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.
May 2016 - It can be obtained from Mouser Electronics new display 1092 from VDC. The new LED...
This circuit generates circles on the screen of an oscilloscope. The circuit is from old...
This old configuration using a germanium transistor was designed to operate with variable...