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56BASIC EXPERIMENT BOARDS FOR THE MICROPROCESSOR KITS

(VBMB SERIES) 

                   Vi Microsystems offers 3 types of Experiment boards for the Microprocessor lab namely, 

 i) VBMB Series

ii) 8255 Parallel Port based

iii) Non-Bus based stand alone series

                The VBMB series of Experiment boards directly interface to CPU bus through a 50 pin FRC Connector. The 8255 parallel port based Experiment boards interface to 8255 port through a 26 pin FRC Connector. The Non-bus based is the stand alone Trainer board or Products The VBMB series of boards act as a very powerful Experiment Modules for the Beginners/Students,

i) To learn the use of the microprocessor peripheral devices.
ii) For an in depth understanding on the programming flexibility of the peripheral devices.
iii) To interface the peripherals to the external world.
iv) To debug the Hardware Circuitry.

        All the VBMB boards can be interfaced to any of our Microprocessor/Microcontroller kits using an unique Bus namely VXT-Bus. Most of the VBMB Boards can also be interfaced to an IBM PC through our VAD-107 Board.

        8255 Parallel port based Experiment boards are cost effective, works thorough 8255 port and it can be interfaced with an IBM PC through our VAD-125 card. The Non-Bus based Experiment boards, Trainers etc. are works in standalone mode. It needs an external power supply.

FEATURES:

  • VBMB boards are compatible with all the Vi range of Microprocessor/Microcontroller Kits (8/16/32 bit Microprocessors / Microcontroller).

  • The complete circuit diagram, component layout, sample softwares and full component description are presented in the application manual, which accompanies every VBMB boards.

    		•

                        1. Key board/display interface board (VBMB-001)

                        2. 2 channel DAC interface board (VBMB-002)
                         3. 8 channel ADC interface (VBMB-003)
                        4. 16 channel ADC interface (VBMB-003A)
                        5. 8251 & 8253 interface (VBMB-004)
                        6. Printer interface (VBMB-005)
                        7. Printer simulation interface (VBMB-005A)
                         8. 8259 Simulator Interface Board (VBMB-006)
                        9. 8259 Interface Board (VBMB-007)
                        10. 8255 Interface Board (VBMB-008)
                        11. High Speed ADC Interface Board (VBMB-009)

                        12. CRO Interface Board (VBMB-010)

                        13. DMA Interface Board (VBMB-011)

                        14. FDC interface (VBMB-012)

                        15. Stepper motor controller (VBMB-013A)

                        16. Real time clock/calender board (VBMB-015)

                        17. 8 Digit Multiplexed Display card: [VBMB-016]

                        18. DC Motor Speed Measurement & Control [VBMB-017]

                        19. LCD Interface Card: [VBMB-018]

                        20. Elevator Simulator Interface: [VBMB-022]

                        21. Dual Slope ADC Interface [VBMB - 023]

                        22. EPROM Programmer Interface Board: [VBMB-024]

                        23. RAM Interface Trainer: [VBMB-024A]

                        24. ROM Interface Trainer: [VBMB-024A]

                        25. GPIB Interface Trainer: [VBMB-026]

                        26. VGA VIDEO Display Board: [VBMB-027]

                        27. Object Identifier and Detector [VBMB-029]

                        28. ADC & DAC / Measurement & Control Module [VBMB-030]

                        29. FLASH Memory Programmerr [VBMB-031]

                        30. ADC & DAC Interface Board : [VBMB-033]

                        31. VXT Bus Extender: [BUS EXTENDER]

                        32. Keyboard and Display Module : [VLIM-001]

                        33. ADC & DAC Interface: [VLIM-002A]

                        34. 8/16 Channel  ADC Interface Board: [VLIM-003A]

                        35. 8253 Demonstration Board: [VLIM-004]

                        36. Stepper Motor Condroller With Motor: [VLIM-013A]

                        37. Real Time Clock  / Calender Board: [VLIM-015]

                        38. 4 Digit Display Card: [VLIM-016]
                        39. Elevator Simulator Interface: [VLIM-022]

                        40. Matrix Display: [VLIM-023]

                        41. Switches and LED module [VLIM-024]

                        42. PC Based LCD Interface Card [VLIM - 025]

                        43. Cinstant voltage & Current Source card [VLIM - 02C]

                        44. Hexa Decimal KeyBoard: [HKEY]

                        45. Stepper Motor Interface Board: [STEP III]

                        46. Traffic Light Control System: [TRAF]

                        47. Logic Controller Board:[PLC]

                        48. 12-BIT Data Acquisition Board [VDAS-12L]

                        49. 12-BIT Data Acquisition Board [VDAS-12]

                        50. IC Tester Simulator Board

                        51. Crystal Clock Divider:[XTAL-CLK]

                        52. Tone Generator and  Audio Cassette Interface: [TGEN]

                        53. Function Generator and DAC study module: [VSTM-02]

                        54. DAC stand alone study module: [VSTM-02A]

                        55. ADC 8 channel standalone module : [VSTM-03]

                        56. Logic Trainer board on ALU (using PALs) with power supply [VSTM - 04]

                        57. RAM study card : [VSTM-024R]

                        58. EPROM study card:[VSTM-024E]

    1. Key board/display interface board (VBMB-001):                                     [TOC]
  • INTEL 8279 Keyboard/Display Interface
  • 6 Digit Display and 18 keys  keyboard
  • Provision for Control and  Shift Keys
  • Facility for  Interrupt  I/O Transfer
  • Provision  for  test  points  & fault analysis points
  • Provision  to connect IRQ, output lineof 8279 to any one of Interrupts RST 5.5, 6.5 or 7.5
  • All Address, data and control  lines are  terminated  in  a 50 Pin FRC OEN  make  male connector to interface with VXT bus
    		•
    2. 2 channel DAC interface board (VBMB-002):                                          [TOC]

  • Two  numbers  of DAC 0800
  • Analog Output: +5V to -5V
  • DAC  outputs  are   terminated  at  a suitable connector available on- board
  • Provision  for  test  points  & fault analysis points
  • All Address, data and control  lines are  terminated  in a 50 Pin FRC OEN make  male  connector  to interface  with VXT bus
    • 3. 8 channel ADC interface (VBMB-003):                                                    [TOC]
  • Incorporates ADC 0809
  • Start  of Conversion by manual switch or software
  • End  of  Conversion  (EOC)  monitored through Interrupt / Polling
  • Display  of digital  data using LED's
  • All  the   8  channel  analog  inputs terminated at Screw type connector.
  • Trimpot   is   provided on-board to channel 0 or 3 or 6
  • Provision  for  test  points  & fault analysis points
    		•
    4. 16 channel ADC interface (VBMB-003A):                                                   [TOC]

  • Incorporates two nos ADC0809

  • Start of conversion by  Manual or Software, selectable by jumpers.

  • End of conversion (EOC) monitored through interrupt or by polling, selectable by jumpers.

  • Display of digital data using LED's

  • All the 16 channel Analog inputs are terminated at J801 screw  type connector

  • Trimpot is provided onboard  for connecting to channel 0 or 3 or 6 of both the ADC0809.               

  • All Address, data and control  linesare  terminated  in  a 50 Pin FRC OEN  make male  connector  to   interface with VXT bus.

    • 5. 8251 & 8253 interface (VBMB-004):                                                             [TOC]

  • Incorporates INTEL 8253 timer & USART 8251

  • Provision  to give External/Internal/Manual input clock to 8253         

  • Output of channel 2 to CPUs interrupt

  • Baud  rate  generation for 8251 using 8253

  • Standard  RS232C  serial  port in a 9 Pin 'D' Male Connector

  • All  timer  inputs/outputs terminated in a 10 Pin Header

  • Loop  back  provision  to  check  the serial port

  • Provision  for  test  points &  fault analysis points                       

  • All Address, data and control  lines are  terminated  in  a 50 Pin FRC OEN  Make  male connector  to   interface with VXT bus.

    		•

    6. Printer interface (VBMB-005):                                                                      [TOC]
     

  • Centronics     Compatible     Printer Interface

  • Loop-back  provision  to  check   the working of the port          
    Facility  for  Interrupt  based   I/O transfer

  • Printer  Control and  status  signals monitored using LED's

  • Provision  for  test points  &  fault analysis points                     

  • All Address, data and control  lines are  terminated  in  a 50 Pin FRC OEN  Make  maleconnector to interface  with VXT bus.                        

    •  

    NOTE : This interface board is compatible with dotmatrix printers only.
    7. Printer simulation interface (VBMB-005A):                                                 [TOC]
     

  • Specifically designed to demonstrate the centronics printer interface

  • Only needs an external +5V power supply

  • Can be set in manual or auto mode

  • Facility  to send ASCII DATA  to  the printer with eight SPDT switches

  • Facility  to print a particular  data continuously

  • LED's are provided to show the status of the printer                                     

  • Provision to give strobe using debounce circuitry of NC/NO switch.           

    •  

    EXTERNAL POWER SUPPLY

                 (5 Volt @ 500ma)                     

     

    NOTE : This interface board is compatible with dotmatrix printers only.
    8. 8259 Simulator Interface Board (VBMB-006):                                              [TOC]
     

  • Specifically designed to learn the internal  operation  of INTEL 8259            

  • 3 DIP Switches decide the starting address of ISR

  • Options to choose either with 8085 CPU or with 8086/88 CPU

  • Provision  to  study  the complete internal  timing  of  INTEL   8259

  • Provision  for test points & fault analysis points                      

  • All Address, data and control lines are  terminated in a 50 Pin FRC OEN Make  male connector to interface with VXT bus.                        

    		•

    9. 8259 Interface Board (VBMB-007):                                                              [TOC]
     

  • Incorporates INTEL 8259, Programmable Interrupt  Controller Chip

  • 8 switches provided for giving interrupts

  • 8 IRQ lines terminated at a 10 Pin Header

  • Compatible with 8085, 8088/86 CPU Based Microprocessor Kits

  • Provision for test points & fault analysis points

  • All Address, data and controllines are terminated in a 50Pin  FRC OEN Make male connector to interface  with  VXT bus.

    		•
    10. 8255 Interface Board (VBMB-008):                                                            [TOC]

  • Incorporates INTEL 8255, Programmable Peripheral Interface Chip

  • All essential extra hardware provided to operate 8255 in Mode 0 or Mode 1 or Mode 2

  • 8 Nos. of SPDT Switches provided at Port A for giving 8 TTL inputs 

  • 8 Nos. of LED's  provided at Port B  for outputs

  • Provision  to interrupt the CPU in Mode 1 and Mode 2

  • All the ports lines  are terminated in a standard 26 Pin Header FRC OEN make male connector for high reliability

  • Provision   for test points  &  fault  analysis points                                         

  • 50 Pin FRC-OEN type connector for high reliability to interface with VXT with VXT bus.

  • 5 Nos. of LED's provided at port "C"  [Control Port] to indicate IBF A, IBFB, OBFA, OBFB & INTR in Mode 1 and Mode 2.                                        

  • 3  Instrument  type  high  quality switch with debouncing logic provided for generating ACK A, ACKB, STBA and  STBB in Mode 1 & Mode 2.

  • All Address, data and control  lines are  terminated  in  a 50 Pin FRC OEN  make  male connector  to   interface with VXT bus.   

    		•

    SUGGESTED EXPERIMENTS

                 1. Program  8255 in Mode 0 and study all operation.

                 2. Program  8255 in Mode 1 and Mode 2 study all operations & timing  diagram in Mode2.

                 3. Study of 8255 for strobed I/O data transfer in Mode 1.

                 4. Program  in  Mode  2  for  strobed Bidirectional Input/Output

                 5. Program 8255 to generate INTR

    11. High Speed ADC Interface Board (VBMB-009):                                            [TOC]
     

  • Single  Channel  High Speed Bipolar ADC using AD1674 Resolution:12 bits Conversion Time:10 Micro secs (max) Maximum  Input  Voltage:+5V or +10V  (Jumper Selectable)

  • 8 Bit / 12 Bit Bus Support

  • In_Built Sample and Hold

  • Three channel, 16 bit Timer                    

  • An_1 Bus Termination                 

  • All Address, data and control  lines are  terminated  in  a 50 Pin FRC OEN  make  male connector  to   interface with VXT bus.

    		•

    Optional:

  •  Single  Channel  High Speed BipolarDAC Using AD667, Resolution:12 Bits

  •  Settling time:3 uSec                

  •  Output voltage range +5V            

    •  

     Accessory :

  • An-1 16 pin dio extension board     

    		•
     
    12. CRO Interface Board (VBMB-010):                                                               [TOC]
     

  •  Two  8-bit ports to select  character and its position

  •  Two  channel  8-bit DAC for X  and  Y  inputs of CRO

  •  Facility to control the  Z-modulation input of the CRO

  •  8KB  Character generator  for  alpha- numeric or graphic characters

  •  Provision  for  test points  &  fault analysis points                                         

  •  All Address, data and control  lines are  terminated  in  a 50 Pin FRC OEN make  male  connector to interface with VXT bus.

    		•
     
    13. DMA Interface Board (VBMB-011):                                                              [TOC]
     

  • Designed to demonstrate the INTEL 8237 Direct Memory Access Controller

  • One 8-bit input port with DIP Switch

  • One 8-bit output port with LEDs

  • 8K 8-bit static RAM to explain the memory to memory transfer

  • Facility to demonstrate HOLD and HLDA timing

  • Provision to give hardware DMA requests

    		•

  • Provision for test points & fault analysis points 14. FDC interface (VBMB-012):

  • All Address, data and control lines are terminated in a 50 Pin FRC OENmake male connector to interface with VXT bus.

    		•
     
    14. FDC INTERFACE BOARD: [VBMB-012]                                                        [TOC]
     

  • Incorporates the single chip Floppy Disk Controller 8398

  • Supports up to 2 drives (maximum)

  • 1.2MB / 1.44MB format selectable by software which depends on Microprocessor Kit's speed and capacity

  • IBM PC compatible I/O decoding

  • Internal write pre compensation and data separation

  • Data transfer through Polling / Interrupt

  • LEDs are provided to monitor the status of disk drive

  • Sample software to format a track, read and write a sector

  • All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interface with VXT bus.

  • 1.44 MB FDD UNIT:
    # One 1.44 MB Floppy Drive
    # Suitable power supply provided
    # Interfacing cable
    # Housed in a sleek cabinet

    		•
     
    15. STEPPER MOTOR CONTROLLER [VBMB-013A]                                            [TOC]

  • Drivers provided for controlling two stepper motors simultaneously. (one optional)

  • Can control Stepper motors ranging from 2Kg to 20Kg

  • Provision for connecting external power supply of 6V, 12V or 24V, selectable by jumpers.

  • All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interface with VXT bus.

    		•

  • OPTIONAL
    1. Two TTL I/O inputs for sensing limit switch.
    2. Second stepper motor interface board
    3. 2 Kg @ 6 Volt Stepper motor
    4. Stepper Motor (7Kg)/6Volt
    5. Stepper Motor (10Kg)/6Volt
    6. Stepper Motor (20Kg)/6Volt

    •  

  • POWER SUPPLY FOR STEPPER MOTORS
    Special Linear Power Supply (6 Volts @ 6 Amps)

  • Note:

  •  (1) For 2 Kg Stepper Motor, no need for external power supply.
     (2) For other stepper motors, an external  6 volts power supply is required.

    		•
     
    16. REAL TIME CLOCK / CALENDER BOARD: [VBMB-015]                                    [TOC]
     

  •  Based on MSM 5832 Read Time Clock/Calender Chip

  •  Data/Time programmable by Microprocessor

  •  Four Digit Seven Segment LED Display for Time/Date display

  •  3.6V rechargeable Ni-Cd battery backup

  •  Interrupt facility for interrupting the CPU

  •  Test and fault analysis points for debugging

  •  All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interface with VXT bus.

    		•
    EXPERIMENTS:
  •  Get the current time and store it
  •  Get the current data and store it
  •  Display the current time
  •  Display the current date
  •  Interrupt the CPU for every second
  •  Interrupt the CPU for every hour
    • 17. 8 DIGIT MULTIPLEXED DISPLAY CARD: [VBMB-016]                                    [TOC]

  •  8 Digit Seven Segment Displays

  •  Binary Indication of selected digit thorough LEDs

  •  Independent ports for digit selection and issuing digit data

  •  Fully software controlled multiplexed display

  •  Detailed Hardware & Software Manual

  •  All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interface with VXT bus.

    		•
     
    18. DC MOTOR SPEED MEASUREMENT & CONTROL MODULE : [VBMB-017]         [TOC]

  •  8 Bit DAC to control the speed and direction of DC motor

  •  6V DC motor with slotted disk

  •  Optical pickup with wave shaping circuitry for speed sensing

  •  Speed measurement through 8253 * Channel 1 and Channel 2 of 8253 is fully made available for the user

  • Drivers for driving the DC Motor

  • No external power supply is needed

  • Designed for teaching DC motor control fundamentals.

    		•

  • Counter channel 0 is used for measuring the speed of the DC motor by decrement the counter value using the pulses generated by the opto-coupled DC motor shaft, for a known time and calibrating the count value to RPM

  • All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interface with VXT bus.

    		•
  • Applications:
     # Speed control of DC Motor
    # Study of Proportional Control
    # Speed measurement using Optical  pickup
    		•
    19. LCD INTERFACE CARD: [VBMB-018]                                                             [TOC]

  • 2 Row x 16 Column LCD Dot Matrix Display Alphanumeric Display

  • Relevant Software with detailed Hardware & Software Manual

  • All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interfaces with VXT bus.

    		•
    20. ELEVATOR SIMULATOR INTERFACE: [VBMB-022]                                        [TOC]
     

  •  8 floors and 2 lifts are assumed.

  •  Each Lift is represented by a column of 8 LED's.

  •  Preset thumb wheel switch is provided for the user to select the floor number.

  •  One Momentary switch provided for the user to confirm their request input.

  •  Two Momentary switches provided for UP and DOWN movement request

  •  Buzzer and an LED are provided for Audible and visual Error status indication.

  •  Provision for interrupt driven request service.

  •  All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interface with VXT bus.

    		•
     
    21. DUAL SLOPE ADC INTERFACE [VBMB - 023]                                               [TOC]
     

  •  VXT Bus based

  •  Dual slope AD conversion is implemented using discrete ICs & components (Op-Amps, Counters  etc.)

  •  Six analog input channels

  •  Channel Selection through software using Mux CD4051

  •  All the 6 Input channels are terminated is a FRC 16 pin header

  •  End of conversion (EOC) monitored through polling

  •  Display of digital data using LED's

  •  All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interface with VXT bus.

    		•
     
    22. EPROM PROGRAMMER INTERFACE BOARD: [VBMB-024]                            [TOC]
     

            This module demonstrates the working principle of programming EPROM

  • EPROM Programmer Interface Programs devices from 2716 to 27512.

  • Programming voltage selection through software.

  • Functions: Read, Program, Verify and Blank check.

  • Device and function selection through software.

  • 28 pin ZIF socket provided on board.

  • All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to  interface with VXT bus.

    		•
     
    23. RAM INTERFACE TRAINER: [VBMB-024A]                                                     [TOC]
     

  •  A ZIF socket provided to insert RAM/EPROM under study.

  •  Provision to study the Read/Write waveform timing diagram of popular RAM/EPROMS as 6264,  62256, 2764A and 27256.

  • Study the importance of CE! and OE! signals.

  • All Address, data and control lines are terminated in a 50 Pin FRC OEN type male connector to interface with VXT bus.

    		•
     
    24.ROM INTERFACE TRAINER: [VBMB-024A]                                                      [TOC]
     

  •  A ZIF socket provided to insert RAM/EPROM under study.

  •  Provision to study the Read/Write waveform timing diagram of popular RAM/EPROMS as 6264, 62256, 2764A and 27256.

  •  Study the importance of CE! and OE! signals.

  •  All Address, data and control lines are terminated in a 50 Pin FRC OEN type male connector to interface with VXT bus.

    		•
     
    25. GPIB INTERFACE TRAINER: [VBMB-026]                                                      [TOC]
     

  •  Based on NEC 7210 talker / listener/controller.

  •  VXT Bus based and compatible with all our trainer kits.

  •  Can be directly plugged on to ISA slot of any IBM PC/XT/AT.

  •  Cable to attach IEEE488 compatible instruments.

  •  Can perform data transfer between two trainers using GPIB by Interconnecting a pair of boards.

  •  All Address, data and control lines are terminated in a 50 Pin FRC OEN make male connector to interface with VXT bus.

    NOTE: 2 Nos of VBMB-026 are required for experiments with uP Kits.

    		•
     
    26. VGA VIDEO DISPLAY BOARD: [VBMB-027]                                                    [TOC]
     

  • VXT Bus Based

  • 640 x 350 Resolution

  • Based on 6845 chip

  • TTL Video outputs

  • 16K Display RAM (STATIC) and 8K character generator EPROM

  • On board IBM PC Keyboard Interface

  • IBM PC Key board

  • 14" Monochrome Monitor

    • Applications : 

    1. CRT Monitor Interfacing

    2. IBM PC Key board Interfacing

    3. Operation of Video Interfacing

     
    27. OBJECT IDENTIFIER AND DETECTOR [VBMB-029]                                          [TOC]
     
  • The main aspect of the board is to detect the object with photo diodes.
  • The photo diodes are arranged in 12 x 12 matrix form. Totally 144 photodiodes are used.
  • 24 transistors are used for 12 rows & 12 columns to drive the current
  • This board can be interfaced with Micro 85 eb kit and Micro 85 AD kit
  • With the help of photodiodes, we can identify whether the object is present or not
  • The Object position can be detected and display the row and the column on which the object is present
  • The area of the object also be calculated.
    •  
     28. ADC & DAC / MEASUREMENT & CONTROL MODULE [VBMB-030]                  [TOC]

  •  One Channel 8 Bit DAC 0800

  •  Incorporates 8 channel 8 bit ADC 0809

  •  Start of conversion by manual switch or software

  •  Provision for test points & fault analysis points

  •  Display of digital data using LED's

  •  AD590 circuit for temperature (or) input

  •  End of conversion (EDC) monitored through Interrupt/Polling

  •  All the 8 Channel analog inputs teminated at Screw type connector

  •  One VXT Bus Extender for interfacing with all of our Microprocessor kits

  •  DAC and ADC Outputs / Inputs are terminated at suitable connector

  •  All address, data and control lines are terminated in a 50 pin FRC OEN type male connector to interface with VXT Bus

    		•

    ACCESSORIES
                 

               1. AD 590 Transducer with signal conditioner for Temperature measurement
               2. Water Bath with relay provision for ON/OFF control  This water bath is provided with a heater to generate a  Temperature up to 99oC for temperature measurement by  a transducer. A N/OFF controller with 31 digit display is provided with set point control with which the student can set the desired temperature.

     

  • A 31 Digital Temperature Indicator with ON/OFF control to set the temperature to the desired value by a front panel potentiometer.

  • Signal conditioner with thermocouple provided for the ON/OFF controller.

  • This thermocouple sense the water bath Temperature and keeps it at the desired value by ON/OFF control method.

  • Provision to insert input AD590 Transducer or any Temperature Transducer.

  • Provision to control the Relay directly from a uP or an IBM PC computer

  • The driving signal : TTL @ 20mA

    		•

    V. BASIC LAB TRAINERS
    29. FLASH MEMORY PROGRAMMER [VBMB-031]                                              [TOC]

  • Interface with 8086 Trainer Kit

  • 512K of flash RAM is provided (AM290F40B)

  • Erase, Read & Write operations can be done

  • Fully buffered address, data & Control signals terminated at a 50 pin header (VXT Bus) for interfacing with trainer

  • Provision for higher order address and data lines termination

    		•
     
    30. ADC & DAC INTERFACE BOARD : [VBMB-033]                                             [TOC]
     

  • 12-bit bipolar Intergating ADC (Intersil 7109) Input Voltage range -5 to +5 volts Sampling rate upto 7.5

  • 12-bit D to A Convertor (DAC 1220)Accuracy + LSB Settling time : 2 micro secs.

  • 8 Single ended input (or) Single channel is used

  • All Analog inputs, one DAC output are terminated at An-1 Bus & J801 Connector

    		•
     
    31. VXT BUS EXTENDER: [BUS EXTENDER]                                                       [TOC]
     

  •  Extends the standard VME_Microbus to VXT_bus for using VBMB-Series of boards.

  •  Address, Data and Control signals of 8-bit CPUs are terminated at 50 pin FRC Connector - VXT_bus

  •  Addition Address, Data and control signals of 16-bit CPUs are terminated in a separate 16 pin FRC connector (Optional)

  •  50 Core cable of 1 meter length to connect VBMB-Series of boards

  •  16 Core Cable of 1 meter length for 16-bit boards (optional)

  •  All Address, data and control lines are terminated in a 50 Pin FRC OEN type male connector to interface with VXT bus.

    		•

    Note: For using VBMB-Series of boards, at least one VXT_Bus  Extender is to be purchased for each Trainer Kit.  All "eb" series of kits like Micro-85eb, Micro-86/88  eb have VXT-Bus on board, here there is no need for  separate "VXT Bus Extender"
     

     II. 8255 Parallel Port based experiment boards
     
    32. KEYBOARD AND DISPLAY MODULE : [VLIM-001]                                         [TOC]
     
  •  Parallel Port Based
  •  16 Keys in 4 x 4 matrix.
  •  4 Digit 7 Segment display.
  •  Can be hooked up to any parallel port (Dio-1 standard)
  •  Termination : Dio-1 bus at 26 pin IDC Connector.
  •  Application : 1. Keyboard Design. 2. Interfacing Keyboard.
    		•
     
    33. ADC & DAC INTERFACE: [VLIM-002A]                                                         [TOC]
     

  • Parallel Port Based

  • Two numbers of DAC 0800 - Digital to Analog Convertor,

  • Analog Output: +5V to -5V, DAC  can be used as ADC using successive approximation technique by software.

  • DAC and ADC Outputs/Inputs are connector terminated at suitable

  • Detailed Hardware & Software manual.

  • Power supply
    - Input : 230V A.C.
    - Output : +5V / 3.5 A , +12V / 150 mA.

    •  
    34. 8/16 CHANNEL ADC INTERFACE BOARD: [VLIM-003A]                                  [TOC]
     

  •  Parallel Port Based,

  •  Incorporates two nos of ADC0809, All the 8 channel Analog inputs are terminated at suitable connectors,

  •  Trimpot is provided onboard for connecting to channel 0 or 3 or 6, selectable Jumpers

  •  Detailed Hardware & Software manual

    		•
    Optional :
    Additional 8 Channel ADC
     
    35. 8253 DEMONSTRATION BOARD: [VLIM-004]                                               [TOC]
     
  • Provision to give External/ Internal/Manual input clock to 8253 available in the trainer
  • Baud rate generation and other applications using 8253
  • SPDT switch and jumpers are provided to control the gate and clock inputs of 8253
  • Detailed Hardware & Software manual
    		•
     
    36. STEPPER MOTOR CONTROLLER WITH MOTOR: [VLIM-013A]                     [TOC]
     

  •  Parallel Port Based

  •  Driver for controlling a stepper motor, Can control Stepper motors ranging from 2Kg to 20Kg

  • One 2Kg / 6 Volt Stepper Motor Module

  • Provision for connecting Internal or external power supply of 6V, 12V or 24V, selectable by jumpers

  • Detailed Hardware & Software manual

  • Power supply
    - Input : 230V A.C.
    - Output : +5V / 3.5 A , +12V / 150 mA.

    		•
    37. REAL TIME CLOCK / CALENDER BOARD: [VLIM-015]                                    [TOC]
     
  •  Parallel Port Based
  •  Based on MSM 5832 Real Time Clock/Calender Chip
  •  Date/Time programmable by Microprocessor
  •  3.6V rechargeable Ni-CD battery backup
  •  Seconds adjust provided on board by shunt
  •  Detailed Hardware & Software manual
    		•
     
    38. 4 DIGIT DISPLAY CARD: [VLIM-016]                                                              [TOC]
     
  •  Parallel Port Based
  •  4 Digit Seven Segment Displays
  •  Independent ports for digit selection and issuing digit data.
  •  Fully software controlled multiplexed display
  •  Detailed Hardware & Software Manual
    		•
     
    39. ELEVATOR SIMULATOR INTERFACE: [VLIM-022]                                          [TOC]
     
  •  Parallel Port Based
  •  4 floors are assumed
  •  Separate request and status buttons for each floor
  •  Lift is represented by a column of 8 LED's
  •  Movement of Lift is controlled by software
  •  Detailed Hardware & Software manual
    		•
     
    40. MATRIX DISPLAY: [VLIM-023]                                                                     [TOC]
     
  •  Parallel Port Based
  •  To display 2 character of Alphanumeric
  •  LEDs in Matrix 5 x7.
  •  Detailed Hardware & Software manual
    		•
     
    41. Switches and LED module [VLIM-024]                                                          [TOC]
     
  •  8 Nos. of SPDT Switches provided through buffers
  •  8 Nos. of LEDs provided and Drivers are provided to drive the 8 LEDs
  •  All the inputs / outputs are terminated at 26 Pin FRC connector.
       (Compatible with 8255 port)
  •  5V @ 500mA External power supply
    		•
     
    42. PC Based LCD Interface Card [VLIM - 025]                                                   [TOC]
     
  •  2 Row * 16 Column LCD Dot Matrix Display Alpha Numerical Display
  •  Relevant Software With Detailed Hardware & Software Manual
    		•
     
    43. CONSTANT VOLTAGE & CURRENT SOURCE CARD [VLIM - 02C]                   [TOC]
     
  •  Parallel Port based
  •  One 12 bit DAC and Op_Amp circuitry to give constant voltage output of 0-12 volt @ 0.2 Amp.
  •  One 12 bit DAC and Op-Amp circuitry to give constant current output of  0-50 mA.
  •  Power supply
    - Input 230V AC
    - Output +12 V, -12V
    		•
     

    III. 8255 PORT BASED EXPERIMENT BOARDS [Ebm Series]
     

                    These boards are designed specifically for Vi Range of trainers to suit the Syllabus of BE, B.E.S, BSc, DCA, DCS, MSc, MCA & Diploma Courses. These boards can be used for BASIC Microprocessor and Interfacing Lab., Advanced Microprocessor and Interfacing Lab., Microprocessors and its Applications Lab., and Microprocessor and Microcontroller Lab.
     

     8255 PORT BASED BOARDS

    44. HEXA DECIMAL KEYBOARD: [HKEY]                                                            [TOC]
     

  •  Parallel Port Based

  •  16 keys in 4 x 4 matrix

  •  Can be hooked up to any parallel port (Dio-1 standard)

  •  Termination: Dio-1 bus at 26 Pin IDC Connector

  • Applications : 1. Keyboard Design
    2. Interfacing keyboard

    		•
     
    45. STEPPER MOTOR INTERFACE BOARD: [STEP III]                                        [TOC]
     
  •  Parallel Port Dio-1 bus Based
  •  Controls 3 Stepper motors simultaneously
  •  Drivers provided for driving up to 15 Amp Stepper Motors
  •  Imported Connectors are provided to connect stepper motors easily
  •  Power Connector provided on the board for external power supply
  •  Can be connected to Parallel port (Dio-1 Bus) of all the kits
    		•
    Applications : 
    1. Operating Stepper Motor
    2. Robotic Control
    STEPPER MOTOR (7kg, 10 & 20 kg)
    1. Stepper Motor (7Kg)/6 Volt
    2. Stepper Motor (10Kg)/6 Volt
    3. Stepper Motor (20Kg)/6 Volt
    4. POWER SUPPLY FOR STEP-III BOARD Special Linear Power Supply for STEP-III (6 Volts and 6 Amps)
     
    46. TRAFFIC LIGHT CONTROL SYSTEM: [TRAF]                                                  [TOC]
     
  •  Connected to parallel port (Dio-1 bus) of all the kits
  •  32 LEDs provided to Simulate Traffic Control System
  •  Buffers provided for individual LEDs 
    • Applications : 1. Traffic light simulation
     
    47. LOGIC CONTROLLER BOARD: [PLC]                                                              [TOC]
     
  •  Parallel Port (Dio-1 bus) Based
  •  12 TTL Buffered outputs
  •  12 LEDS at all the outputs
  •  12 TTL Buffered inputs
  •  12 LEDs at all the inputs
  •  Software to control various logic combinations
    • Applications : 1. Control outputs either sequentially or combinationally depending upon inputs.
     
    48. 12-BIT DATA ACQUISITION BOARD [VDAS-12L]                                              [TOC]
     

  •  Parallel Port Dio-1 bus Based

  •  12-bit bipolar Integrating ADC (Intersil 7109) Input voltage range -5 to +5 Volts Sampling rate upto 7.5 conversions per second very high accuracy

  •  All Analog inputs, are terminated at An-1 Bus

    		•
     
    49. 12-BIT DATA ACQUISITION BOARD [VDAS-12]                                                [TOC]
     

  • Parallel Port Dio-1 bus Based

  • 12-bit bipolar Integrating ADC (Intersil 7109) Input voltage range -5 to +5 Volts Sampling rate upto 7.5  conversions per second very high accuracy 

  • 12-bit D to A Convertor (DAC 1220) Accuracy + LSB Settling time: 2 micro secs.

  • 8 single ended input/4 differential input

  • All Analog inputs, one DAC output are terminated at An-1 Bus

  • Termination: An-1 bus at 16 Pin IDC Connector

    		•
    Applications : 
    1. 12 bit ADC Interfacing
    2. 12 bit DAC Interfacing
    3. Voltage measurement
    4. Temperature Measurement
    5. Waveform Generation
    6. Signal Gain Control
    7. Thermocouple Interface.
    ACCESSORIES :
    1. An-1 Extension Board with 16 Core Cable [AN1EB]. This board converts 16 line from the IDC connector to 16 screw type connectors, arranged in two rows, for easy connections
     
    50. IC TESTER SIMULATOR BOARD: [VICS]                                                       [TOC]
     
  •  Circuitry for generating signalsfor 14/16 Pin ICs
  •  Connected to parallel port (Dio_1 Bus)
    		•
     
    51. CRYSTAL CLOCK DIVIDER: [XTAL-CLK]                                                        [TOC]
     
  •  It can be operated in as a stand alone unit by giving external supply of +5V dc.
  •  Can be connected to 8255 I/O port.
  •  Fundamental clock is generated using a 1 MHz crystal
  •  13 different frequency (TTL clock) outputs are generated using clock dividing circuits.
    i) From 1 MHz to 1 Hz in steps of  10 [1MHz, 100K, 10K, 1K, 100Hz, 10Hz, 1Hz]
    ii) From 200 KHz to 2 Hz in steps of 10 [200K, 20K, 2K, 200Hz, 2Hz]
    		•
     
    52. TONE GENERATOR AND AUDIO CASSETTE INTERFACE: [TGEN]                   [TOC]
     
  •  Can be connected to the 8255 I/O port.
  •  Tones of various frequency ranges can be generated by programming the 8255 output.
  •  Miniature speaker provided onboard
  •  Provision for connecting Timer output to generate continuous musical tones.
  •  Interface circuitry provided to write or read datas to or from an Audio Cassette.
  •  Two connectors (EP-socket) are provided for connecting EAR and MIC of tape recorder.
    		•
     

    IV. NON BUS BASED EXPERIMENT BOARDS
     
    53. FUNCTION GENERATOR AND DAC STUDY MODULE: [VSTM-02]                      [TOC] 
     
                    This module is designed to demonstrate the working principle of Digital to Analog Converter and the principle of generating various waveforms like square wave, sine wave, triangle wave, sawtooth wave and special waveforms
    Specification:

  • The digital data is converted into Analog one, using this module.

  • 8 bit D/A converter.

  • 8 SPDT switches provided to give digital data

  • Digital input can be given manually through 8 SPDT switches or automatic mode.

  • 8 LED's monitoring the status of data to DAC 0800.

  • Analog output waveforms terminated at screw type connector

  • One trimpot is provided to vary the amplitude of the generated waveform by varying the reference level of the DAC.

  • Another trimpot is provided to vary the frequency of the generated waveform by varying the clock frequency of the counter

  • Additional hardwares like EPROM stored with data, Counter for generation of address etc. are provided to generate the Sine, Square, Sawtooth, Triangle and special waveforms

  • 100 conversion per second.

  • Jumper provided to select different waveforms and modes of operations.

  • POWER SUPPLY
    - Input : 230V A.C.
    - Output : +5V /1A , +12V/150mA

    • 54. DAC STAND ALONE STUDY MODULE: [VSTM-02A]                                      [TOC]
     
    This module is designed to demonstrate the working principle of Digital to Analog Converter
    Specification:

  • The digital data is converted into Analog one, using this module.

  • 8 bit D/A converter.

  • 8 SPDT switches provided

  • Digital input can be given manually through 8 SPDT switches or automatic mode.

  • 8 LED's monitoring the status of data to DAC 0800.

  • One trimpot is provided to vary the amplitude of the generated waveform by varying the reference level of the DAC.

  • 100 conversion per second.

  • Timer provided for generating clock pulse to the Ripple counter

  • POWER SUPPLY
    - Input : 230V A.C.
    - Output : +5V / 1A , +12V/150mA

    		•
     
    55. ADC 8 CHANNEL STANDALONE MODULE : [VSTM-03]                                [TOC]
     
    This module is designed to demonstrate the working principle of Analog to Digital Converter.
     

  • 8 Channel 8 bit ADC.

  • 8 bit A/D conversion based on ADC 0809

  • Start of Conversion by Manual switch

  • All 8 Channel analog inputs are available at screw type connector

  • A potentiometer is provided for demonstration Analog Input

  • A Metha key switch is provided for ALE

  • LED provision for SOC indication

  • Digital data is displayed using the LED's.

  • Status of end of conversion signal is monitored using LED's.

  • Test points are provided for SOC, EOC & ALE signals.

  • POWER SUPPLY
    - Input : 230V A.C.
    - Output : +5V / 1 A , +12V/150mA,

    		•
     
    56. Logic Trainer board on ALU (using PALs) with power supply [VSTM - 04]       [TOC]
     
  • Standalone PAL demonstration board to conduct the Arithmetic and Logic Unit Experiment
  • Arithmetic Operation Mode
    # Addition
    # Subtraction
    # Shift Operand A one position
    # Magnitude one comparator
    # Plus twelve other Arithmetic operation
  • Logic Function Mode
    # Ex-OR comparator
    # AND, NAND, OR, NOR
  • Two 4 bit words input
  • 4 bit output
  • 8 SPDT switch provided to simulating the two 4 bit words
  • 4 LEDs provided at the output of the ALU for mounting the outputs.
  • Built-in Power supply
    •  
    57. RAM STUDY CARD : [VSTM-024R]                                                                    [TOC]
     
            A standalone trainer to study a most popular static RAMs used  in a Microprocessor system. This trainer would be very useful in training the student in various timing diagram of  the popular these static RAMS.

  • A highly reliable machine, gold plated, socket provided to insert RAM under study.

  • Provision to study the Read /Write waveform. timing diagram of popular RAM like 6264, 62256 etc.

  • Read & Write operation can be selected by jumper

  • 12 bit counter for address generation.

  • 12 LED's are provided to indicate the address of the RAM.

  •  8 Bit data can be written in to the RAM through a buffer.

  • Data selection by jumper pins.

  • 8 LEDs provided to indicate the Data In or Data Out of RAM.

  • Circuit provision for WRITE PROTECTING the RAM.

  •  5V Power Supply

    		•
    Experiments:
  •  Study the chip select signal of RAM
  •  Study the Read signal of RAM
  •  Study the WRITE signal of RAM
  •  Study the "WRITE Projected"signals.
  •  Write known pattern of Data in RAM
  •  Read the RAM Data & Verify
  •  Study the timing Diagram of the RAM.
    		•
     
    58. EPROM STUDY CARD : [VSTM-024E]                                                              [TOC]
     
                A standalone trainer to study the most popular EPROMs used in a Microprocessor system. This trainer would be very useful in training the student in various timing diagram of the popular EPROMS.
  •  A highly reliable machine gold plated socket provided to insert EPROM under study.
  •  Provision to study the Read waveform. timing diagram of popular EPROM like 2764, 27256 etc.
  •  12 bit counter for address generation.
  •  12 LEDs are provided to indicate the address of the EPROM.
  •  8 LEDs provided to indicate the "Data Out" of EPROM.
  •  5 V power supply
    		•
    Experiments:
  • Study the chip select signal of EPROM
  • Study the Read signal of EPROM
  • Read the EPROM data & verify
  • Study the Timing Diagram of the EPROM.
    		•
     

    .

       
     

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