We found this circuit in a Radio Electronics from October 1976. The components are still common, but the circuit applies to older car models with contact breaker ignition.
This circuit indicates the resistance of the skin of those who hold the electrodes. RV1 makes the...
This sensitive receiver of 7 germanium transistors was manufactured in the 1960s in Japan. The...
This circuit was found in an Analog Devices manual and can supply a 3 mA current or drain a 10 mA...