Categories of circuits

Timers, alarms, detectors and other sensor based circuit diagrams

Audio amplifier circuit diagrams, but also preamp, equalizer, mixer and other electrical circuit diagrams.

Build your own electronics instrument for testing components and circuits, or temperature measuring device...

You need a power supply for your laboratory? Here are some electric diagrams of several types of power supply: high power, stabile voltage, battery charger, variable voltage etc.

Very popular circuits! Running lights, stroboscope, light shows

Am, fm transmitters, receivers, RF amplifiers, detectors, VHF, wireless microphones, spy bugs...

Telephone circuit diagrams, phone bugs, custom ring tone... Make your phone glows when someone calls you and similar.

Miscellaneous electronics circuits

In this circuit diagrams category you can find speed meter, courtesy light, siren horns, etc.

Extend your PC using these circuits