The coils of this circuit will determine the transmission frequency of this device. The circuit is from the 1960 Mullard transistor reference manual and makes use of germanium transistors.
This circuit works with small 5 V incandescent lamps but can be modified to operate with LEDs. The...
This circuit found in Radio Electronics can be used in games to produce a random pulse train. The...
This photometer is based on a Wheatstone bridge that must be balanced by the linear potentiometer P1. The...