Found in an Australian documentation from 1991, this circuit was sold in a kit at the time. It is a small FM transmitter with a very common configuration, also found in other projects on this site.
This circuit, from a publication in the 1970s, uses transistors that no longer exist, but can be...
Indicated as a joke or challenge this circuit shows how it is possible to control two lamps using...
Found in a 1960s RCA documentation, this circuit applies to most common triacs. The trigger device is a...