Tutorials Index

The coil on the left is coil#1, and has 17 taps. The other coil is coil #3. The vertical...

This wide-range light dimmer circuit uses a unijunction transistor and a pulse transformer to...

This simple three-phase tester, uses only a small current thyristor as a main element for testing...

This is a sensitive, mini-powered FM transmitter consisting of an rf oscillator section...

The ESR Meter is basically an AC Ohmmeter with special scales and protective circuitry. It...

Here the simple audio mic pre amplifier circuit based on single IC LM358. The circuit is very...

The 220-240V AC mains source is stepped down to 9V AC by transformer X1. The transformer output...

This is a low power voltmeter circuit that can be used with alternative energy systems that run...

This oscillator circuit is designed to generate both a rectangular wave and a triangle waveform,...

Do you drive an older car without an automatic "lights-on" warning circuit If so, you`ve probably...

A common-emitter transistor amplifier, the opposite phase output signal of the input signal, also...

Electric start and stop the timer circuit diagram shown in the following cycle, LM555 adjustable...