Monostable 4098 (CIR25124E)

This CMOS circuit is re-triggerable. It was found in the April 1988 issue of Radio Electronics magazine;

Automatic Telephone Recorder (CB5992E)
This circuit turns on an old cassette recorder when the telephone rings, thus enabling the...
6V Charger (CB4790E)
This circuit was found in a Poptronics of the 90's. The circuit limits the load current to 0.6 A....
High Power Switch Using SCR (CB540E)
Incandescent lamps and heaters can be controlled by a low power switch using this circuit. The...