DC to DC Converter

The circuit below is a DC to DC converter using a standard 12 VAC center tapped power transformer wired as a blocking oscillator. The circu...

Simple Intercom

   Simple Intercom with IC = LM390

Intercom

A diagram of the modified mini amplifier as a two-way voice communication. Very easy to assemble and fun.

Equivalent Series Resistance Meter (ESR Meter)

Project Description This project was conceived as a way to enhance the collection of test equipment on my test bench. I buy a lot of o...

Bench Power Supply

Introduction After some fooling around with batteries every hobbyist should think seriously investing into a decent power supply . You cou...

AC Current Monitor

AC Current Monitor Senses high current-flow into power cables No wire-cutting, three versions available Circuit diagram: Parts: R1,R2...

Simple Capacitance Meter

Simple Capacitance Meter Operates in conjunction with a voltmeter 1pF to 22µF in six Ranges - 9V Battery supply Parts: P1_____________4...

Fox and Hound cable tracer

The "Fox" and "Hound," made by Triplett Corporation (http://www.triplett.com), are a transmitter and receiver for traci...

Fox - Hound, Cable Tracers

Fox - Hound, Cable Tracers, Signal Tracers, Line Tracers - whatever you want to call them   This is the device that allows you to trace wire...

Cable Tracer

The transmitter is built on a small length of PC board, cut into lands with a file. The photo clearly shows how all the components are moun...

Square wave oscillator as wire tracer

The tracer works by placing a square-wave signal on the line to be traced, The square wave is full of harmonics. small radio placed close ...

CPU Power Supply tester

Cara test PS CPU tanpa terhubung Mainboard: Sambungkan kabel warna hijau dengan kabel warna hitam /Ground ,.jika fan power supply(PS) jala...