This circuit is from a 1968 documentation. It makes use of thermistors (NTC) to indicate overheating of charged batteries. Modern equivalent components can be used.
This circuit provides two slightly different audio signal outputs from a monophonic audio signal, so...
This simple emergency light circuit uses few components and a standard 12 V car or motorcycle...
Found in an American publication from 1968, this circuit aims to keep the torque of a DC motor...