Originally designed to trigger a printer with a delay, this circuit can be used for other purposes. The circuit is from a Radio Electronics from September 1984.
This filter is suggested by the Texas Instruments Linear Circuits Applications, 1986 edition. The...
This CMOS circuit was obtained in a 1980s documentation. The circuit has a 10-second time delay...
This circuit consists of a switched mixer with digital touch control. The circuit was found in old...