This circuit was found in a 1971s English magazine. We can still assemble it using BC548 transistor. The other components are common. The supply voltage of 6 or 12 V depends only on the relay.
This 1974 circuit uses two 555 integrated circuits in a very traditional configuration. The...
This circuit was found in Electronics Now magazine and can be applied to any JFET. The circuit has high...
The receiver shown above was sent in by contributing reader Adriano Muniz Moura and is used for...