Found in a 1967 Ferranti documentation, this circuit uses a LDR from that time as a sensor. Transistors can be replaced with modern equivalents.
This circuit is suitable for testing motor starting capacitors. Capacitors from 2 to 8 uF are...
The coil of this small FM transmitter that works as a wireless microphone consists of 4 turns of...
) This circuit is from an old RCA linear integrated circuit manual from 1972, but it can be...