Monostable 4047 (CB25123E)

This re-triggerable circuit was found in the April 1988 Radio Electronics magazine. Timings are given by R1 and C1.

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...