This circuit indicates when the voltage of a 12 V battery is low. With changes, for example, the zener, the circuit can be used to monitor other voltages.
This remote listening device was found in documentation from the 50's. The transistors used are...
Found in a 2005 Linear Technology application manual, this circuit provides outputs from a current...
Found in the September 1992 issue of Radio Electronics magazine. This circuit generates pulses that...