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Wire Tracer Circuits
Last Updated on:  Tuesday, August 18, 2015 06:50 AM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Beeper to find short circuits -  This circuit uses two 741s or equivalent op Amp to form a beeper that is used to detect short circuits. This design offers a way to trace resistance in the milliohm range, right to a short between bridged traces beneath a solder mask. A1 is configured as a multivibrator. R1 and C1 determine the frequency of oscillation and. . .  [by IQ Technologies Industry, unless otherwise noted online]

 

Broken-Coil Detector Is Simple Yet Robust -  03/04/10  EDN Design Idea   An oscillator, filters, and comparators detect missing wires in an assembly line. . .  [by Juan Pablo Caram, Santiago, Chile]

 

Cable finder seeks out wall conduits -  05/11/00 EDN Design Idea   When you debug home electrical wiring, a tool that determines the location of cable conduits comes in handy, especially when problems arise. Some tools, such as nylon or glass fiber guides, contain small magnets and compasses th. . .  [by Luis Miguel Brugarolas and Manuel RamĂłn, Sire Sistemas y Redes Telematicas, Tres Cantos, Madrid, Spain]

Cable Tester Uses LEDs to Find Faults -  10/22/09  EDN Design Idea   Test as many as 16 wires with LEDs as continuity indicators. . .  [by Pavel Šádek, Apri, Roznov pod Radhoštem, Czech Republic]

 

Circuit tests VCOM drivers -  11-Nov-04 EDN Design Idea   Flat-panel LCD monitors offer excellent image quality andcompact form factor than CRTs—hence, their steadily increasing popularity. Unfortunately, the complexity of their manufacturing process makes LCD monitors considerablyexpensi. . .  [by Soufiane Bendaoud, Analog Devices, San Jose, CA]

 

 

Design Makes Handy Audible Circuit Tracer -  01/09/03  EDN Design Idea   The circuit tracer in Figure 1 is a handy tool for finding connectivity paths on a pc board. Because the sense voltage you use to measure the path is lower than a transistor's VBE voltage, you can use the design in circuits containi. . .  [by Jerry O'Keefe, Cupertino, CA]

 

Detect shorts -  07/08/99  EDN Design Idea   (File contains multiple circuits.   Scroll to find this one. ) hen you manually assemble complex boards, it’s common to short-circuit adjacent component or IC pins. Determining which section of the circuit you have shorted is not too difficult, but finding the precise point where the short exists can be a formidable task, because the short may be under a surface-mount component. . . .  [by Luis Miguel Brugarolas, SIRE, Madrid, Spain]

 

Detect wire breaks with unusual CMOS gate circuit -  02/10/14 EDN Design Idea   TDR in the shop? Try this circuit to detect a wire break. CMOS devices have large input impedance with input currents on the order of 0. 01nA. Adding feedback circuitry can result in a latch-like device that can be used to store bits, and also operate in a more analog mode as shown in this Design Idea, which pinpoints the location of a break in a wire. . . .  [by Raju Baddi]

 

Electroluminescent Wire Sequencer -  Assembly and Operation of the SEQ5 ELWire Sequencer. . .  [John DuBois designer]

 

Fleapower circuit detects short circuits -  07/02/98 EDN Design Idea   (File has several circuits, please scroll to find this one)  Sometimes, the need arises for a short-circuit tester that supplies a low current to the device under test (DUT) and also uses voltages lower than 100 mV to prevent conduction of semiconductors. The circuit in Figure 1 meets these requirements. R1 limits the current in the DUT to 0. 9 mA. The voltage on the DUT can not exceed the value set by the ratio R2/(R1+R2). The NE5230 micropower op Amp compares the voltage on RX (representing the DUT) with the voltage at the junction of R3 and R4. . . .  [by W Dijkstra, Waalre, The Netherlands]

 

Fox-Hound Wire tracer -  The "Fox" and "Hound, " made by Triplett Corporation (www. triplett. com) , are a transmitter and receiver for tracing telephone (and others) wires through walls. You connect the transmitter to the wire, and the receiver helps you trace the wire from several inches distance away. Triplett doesn't say much about how they work, but th Fox and Hound apparently use inductive coupling of a low-frequency signal, maybe around 50 to 100KHz. . .  [Tony van Roon's circuit]

 

Hot-Swap Structure Offers Improved Redundancy -  01/09/03  EDN Design Idea   Design makes handy audible circuit tracer - For redundancy purposes, a number of power supplies, using ORing diodes, can work into the same load. During maintenance, when you can remove any power supply, the minimum possible power perturbation at the load. . .  [by Samuel Kerem, Corvus Corp, Columbia, MD-January 9, 2003]

 

In Circuit Transistor Checker -  It is able to check transistors, in the circuit, down to 40 ohms across the collector-base or base-emitter junctions. It can also check the output power transistors on Amplifier circuits. . . .  [Designed by Randy Linscott]

 

INSIDER V10 -  In-Circuit debugger, created by E. E. Atanasios Melimopoulos. Updated Ver 1r1. . .  [Jose Pino]

 

Milliohm Squawker great at finding shorts and reverse engineering PCBs -  05/23/14  EDN Design Idea   This well thought out tool for “listening to” low resistances really speeds troubleshooting & tracing. . . .  [by Glen Chenier]

 

Quickly find pc-board shorts with low-cost tracer technique -  11/25/04  EDN Design Idea   A predominant failure mechanism for production pc boards is shorted traces. Finding hidden shorts is often time-consuming and frustrating. Typical techniques of cutting traces, lifting pads, and "blowing" shorts are, at best, quest. . .  [by Teno P Cipri, Engineering Expressions Consulting]

 

Scheme detects shorts -  07/08/99  EDN Design Idea   (File contains multiple circuits.   Scroll to find this one. ) hen you manually assemble complex boards, it’s common to short-circuit adjacent component or IC pins. Determining which section of the circuit you have shorted is not too difficult, but finding the precise point where the short exists can be a formidable task, because the short may be under a surface-mount component. . . .  [by Luis Miguel Brugarolas, SIRE, Madrid, Spain]

 

Short circuit tracer/finder uses low power   -  09/07/14  EDN Design Idea   Build this bench tool and become a master at pinpointing shorts. . . .  [EDN Design Idea] by Dan Meeks, 9/07/2014]

 

Short-Circuit Finder uses FeW Parts -  11/05/98 EDN Design Idea   (File contains several ciruits. Scroll to find this one)The simple tester in Figure 1detects short circuits on assembled pc boards and also rings out cables and harnesses. The short finder has a narrow zone of threshold unce. . .  [by Boris Khaykin, Candid Logic Inc, Madison Heights, WI]

 

Signal Injector / Tracer -  A simple test circuit to fault find audio and radio equipment. Can be used to inject a square wave signal, rich in harmonics, or used with headphones as an audio tracer. . . .  [Circuit by Andy Collison]

 

Signal Tracer -  The main part of this circuit is the LM386 Amplifier chip. It also uses a transistor input to buffer the input signal and provide extra gain for the LM386. The little unit has helped me out on numerous occasions when trouble shooting any Amplifier circuit like a stereo receiver, tv / vcr audio section, radios, cd players and car stereos. . . .  [Randy Linscott]

 

Simple scheme detects shorts -  07/08/99  EDN Design Idea   (File contains multiple circuits.   Scroll to find this one. ) hen you manually assemble complex boards, it’s common to short-circuit adjacent component or IC pins. Determining which section of the circuit you have shorted is not too difficult, but finding the precise point where the short exists can be a formidable task, because the short may be under a surface-mount component. . . .  [by Luis Miguel Brugarolas, SIRE, Madrid, Spain]

 

Test VCOM Drivers -  11-Nov-04 EDN Design Idea   Flat-panel LCD monitors offer excellent image quality andcompact form factor than CRTs—hence, their steadily increasing popularity. Unfortunately, the complexity of their manufacturing process makes LCD monitors considerablyexpensi. . .  [by Soufiane Bendaoud, Analog Devices, San Jose, CA]

 

Wire tracer -  Schematic only. . .  [CircuitoZ.net, contact Ruddy]


Wire Tracer Circuits


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