Lie Detector (T1534E)

This circuit was found in a Popular Electronics from December 1956. Power is provided by batteries.

Moving scale DC voltmeter (CB7341E)
This circuit was found in an American publication in 1966. The circuit uses a general-purpose FET that...
Voltage Controlled Monostable (CB9423E)
The time constant for this circuit found in a 1973 publication is given by R and C. The shot is...
3 to 6 V x 3A power supply (CB19306E)
This 3 A adjustable source uses the LM350 integrated circuit, which must have a good heat...