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 power supply was originally designed to power our next circuit (CB18672E) which consists of a...
This encoded lock circuit with alarm for use in homes was found in a publication from the 90s. The...
Indicated for frequency measurements, this circuit can operate with inputs up to 1 MHz. We found...