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Automatic switch-on when it gets dark, 6V or 3V battery operation This design was primarily intended to allow automatic switch-on of push-bi...

This circuit is a video line driver specifically intended for use with a single-ended power supply. As a matter of fact, the synchronised ou...

The digital lock shown below uses 4 common logic ICs to allow controlling a relay by entering a 4 digit number on a keypad. The first 4 outp...

Build a Bootstrapped Amp Current Source Circuit Diagram. This circuit responds to the difference between Vj and V2. Rq on sets gain. Resisto...

This is Simple linear Regulator Circuit Diagram . Intended for extreme temperature, radiation-hardened environments, this linear supply is c...

While we have now published quite a few LED driver circuits, to date we have not published a design to drive a bunch of high-brightness whit...

This dual-polarity, multivoltage power supply circuit diagram can be built for a very small investment. The circuit is built around 78XX an...