Circuit Diagrams

This site contains lots of FREE electronic circuits (schematics) & do-it-yourself (DIY) circuit diagrams for hobbyists, students, professionals etc. Covering a wide range of categories in electronics like:

audio amplifiers, power supplies, home related, computer related, transmitters, receivers, light and LED...

There are also links to sites that offer hobby electronic kits and other electronics hobby related stuff. Use the menu on the right to browse different circuit categories.

If you are looking to purchase electronic equipment, try our electronics store

Touch Activated Light

The circuits below light a 20 watt lamp when the contacts are touched and the skin resistance is about 2 Megs or less. The circuit on the left uses a power MOSFET which turns on when the voltage between the source and gate is around 6 volts.

Curtain Control

This hybrid circuit uses a mixture of transistors, an IC and a relay and is used to automatically open or close a pair of curtains.

02.Feb.2009. - 300 new diagrams!!!

16.Apr.2007. - PIC16F84A discolight effect with bass beat control project updated! New photos, diagrams and texts.

17.Mar.2007. - Ten new circuit diagrams in various categories.

26.Feb.2007. - Four new diagrams in audio category.

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