This circuit for music effects and synthesizers was found in a Radio Electronics issue from June 1974. The circuit also consists of a pulse width modulator.
This 2000 circuit can work with one of the many infrared remote-control transmitters described in this...
This receiver for listening on the phone was found in a Japanese magazine in 1967. The circuit uses...
The circuit shown in the figure is suggested by Intersil (www.intersil.com) and makes use of the...