This circuit is from a 1969 Electronics World. It generates 100 kHz sinusoidal signals determined by the crystal. Capacitors must be ceramic.
This circuit is a continuation of the previous one, serving as a protector against overloads in...
This circuit can handle 25 A unde a 32 V voltage using a hight power old transistor. This...
This circuit was found in 80's Popular Electronics. Transistors are commonly used. The...