Based on a 555, this 80's American documentation circuit detects the voltage of a battery and can then disconnect the charger. The transistor may be a general purpose type.
This low voltage AC control uses a triac. Any TIC series triac can be used and this device must be...
This circuit was found in a Radio Electronics of July 1984. It consists of the traditional power...
This circuit is suggested by Texas Instruments in old documentation. The components depend on the...