UNISTEP TECHNOLOGIES
Wireless control modules for the industry, science, educators, and the hobbyists
Prices are in CAD -- A Currency Converter can be found at the bottom of the page.
   Home      Educational Products      Electronic Troubleshooting
  CIRCUITS with BUILT-IN FAULTS for teaching ELECTRONIC TROUBLESHOOTING

The products in this group are designed as tools for teaching electronic troubleshooting skills. In addition to fully-functional versions, variants of these boards are available with different built-in faults. Students do not have prior knowledge of the faults; they are expected to figure out what is failing and why. The instructor has detailed information about the faults to create an efficient and effective teaching environment.
 
In general, boards in this group are offered in three variants:
 
    Type-A - The original board in operational working condition, tested at the factory, intended as references for troubleshooting.
    Type-B - Boards with built-in faults that can be 'discovered' by visual inspection, such as shorts, missing or 'wrong' components, etc.
    Type-C - Boards with a single hidden fault that cannot be discovered by visual inspection.
 
Since these boards are designed as troubleshooting tools, functional circuit sections and configuration features help the student isolate circuit sections and still be able to troubleshoot while the board is powered up.
 
For an effective troubleshooting session, it is recommended that the lab groups be provided with a Type-C board and a fully-functional Type-A version as a working reference.  
 
 

 TCT - Twisted-Pair Cable Tester

Troubleshooting timer circuits, counters and combinational logic circuits
 
In addition to illustrating a good application of digital combinational logic circuits, TCT board is well-suited to serve as a circuit board to teach electronic troubleshooting skills. It has distinct circuit sections with well-defined functions that can be analyzed, understood, and worked on. Test points and jumper pins built into the circuit will enable the student to isolate circuit sections, observe and measure critical signals and inject signals into the circuit to drive the sections under test.
As can be seen in the Block Diagram (via the link below) the following circuit blocks help provide a rich troubleshooting experience.
  • Time-Base Oscillator
  • Beeper Circuit
  • Counter and Cable Driver
  • Progress Indicators
  • Fault Detector
  • Fault Indicators
  • Start-Stop Logic
  • Power Supply
Instructor will be provided with circuit diagrams showing the details of all of the built-in 'faults'. This enables the instructor to achieve the most efficient use of the lab time by providing measured help to students who may need more or less assistance.
 
If you are interested in finding out more or if you are interested in ordering, please contact us for a price and delivery quote.
 

 DFM - Digital Frequency Meter

Troubleshooting a fully functional frequency counter circuit
DFM module is a very capable frequency counter that can measure the frequency of digital signals up to 90 MHz and analog signals up to 20 Mhz. Complete with a wideband JFET input amplifier stage, a divide-by-10 prescaler, steering logic, a MCU, and a multiplexed 5-digit, 7-segment display, it makes a rich learning environment for sharpening troubleshooting skills..
 
The board was designed to provide nine (9) separate faults for the Type-C variants. Presently DFM does not have any Type-B variants with visible faults.
 
Complete DFM circuit is made up of the following circuit sections: 
  • Input signal limiter and wideband amplifier
  • Prescaler and steering logic
  • Linear voltage regulator
  • Range selector and MCU 
  • Multiplexed frequency display
A User Manual for the students and a Fault Description document for the instructor is provided complete with circuit descriptions, circuit operation, electronic circuit diagrams, and component placement assembly diagrams. Detailed fault descriptions and troubleshooting hints provided to the instructor enables the instructor to achieve the most efficient use of lab time by providing the appropriate level of help to students who may need more or less assistance.
 
DFM boards are designed and manufactured with thru-hole parts to avoid having to use small SMD parts that do not work well in inexperienced hands. As can be seen in the picture, each board comes mounted on a sturdy acrylic base complete with binding posts for supplying power to the board, and non-slip polyurathane rubber feet .
 
If you are interested in finding out more or if you'd like to place and order, please contact us for a price and delivery quote.
 
 

Please contact us if you wish to order more than qty 10 of any single item.
    Copyright (c) 2011 Unistep Technologies