This low power circuit was obtained from an American 80's documentation. The circuit indicates the voltage of a battery being trimmed by the trigger point. The transistors can be the BC549.
This circuit is from a 1970 publication. The time constant is given by 1.3R x C where R is the...
This regulator with current boost and short circuit protection was found in the LM2931 manual that...
This high impedance driver was found in a 1980s documentation. The integrated circuit is a type of...