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Signal Injector Circuit

GaryC - 01/06/14

A signal injector is a very useful and quick troubleshooting tool for signal tracing in a circuit. Using [...]
Functional Schematic

Troubleshooting Automotive Ignition Systems – Part 2

Jim Keith - 11/14/13

The intermittent stalling problem was solved by replacing the distributor. This is the sequel to troubleshooting my ‘86 [...]
automatic pest repellent

Automatic Pest Repellent

T.K. Hareendran - 11/05/13

Automatic Pest Repellent is a non-chemical, clean, harmless and effective solution to unwanted pests. The circuit described here [...]
Bedwet wet diapers circuit

Bedwetting/Wet Diaper Alert System

T.K. Hareendran - 08/24/13

Bedwetting is one of the most common childhood problems that can have a significant impact on a child’s [...]

9 Reasons for Studying Electronic Engineering

Jim Keith - 07/11/13

I am writing this largely in the 1st person in order to convey how I, myself, feel about [...]
Computer Engineering

Computer Science or Computer Engineering, What to Choose?

P. Marian - 07/03/13

This guy has the best argument if you cannot decide what to choose between CE (Computer Engineering) and [...]
Troubleshooting Car Ignition Systems Schematic

Troubleshooting Automotive Ignition Systems – Part 1

Jim Keith - 06/22/13

Automobile ignition systems have never been more reliable, but when not, how does one troubleshoot? and is it [...]
555 Ignition Coil Driver Schematic

555 Ignition Coil Driver

Jim Keith - 06/21/13

This ignition coil driver is a HOT one! From my recollection, it delivers a nastier spark than the [...]
Battery Reverse Polarity Protection Schematic

Battery Reverse Polarity Protection in LV Applications

Jim Keith - 05/25/13

Accidentally connecting a battery reverse can be a real killer in electronic circuits. There are a number of [...]
electrical live wire detector circuit schematic

Electrical Live Wire Detector

P. Marian - 05/19/13

This circuit can detect only electrical wires connected to the mains (live wire). It has an LED for [...]
automatic fan controller circuit schematic

Automatic Fan Controller

P. Marian - 04/17/13

The automatic fan controller circuit shown in the schematic has 2 comparators with different triggering points that are [...]
Trailer Stop & Turn Converter Schematic 2

Trailer Stop & Turn Signal Converter

Jim Keith - 04/05/13

If you ever wondered why your trailer Stop/Turn signal lamps are so dim you are not alone. The [...]
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