three-level touch control (CB7040E)

Found in Popular Electronics this circuit uses common components to control an incandescent lamp with three levels of intensity

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Bootstrapped Emitter Follower Stage (CB25619E)
This circuit with low impedance output and 900k input impedance was found in the October 1993...
LM317 Power Supply (CB25552E)
This power supply circuit was obtained from the February 1993 Radio Electronics magazine. The...
Moving scale DC voltmeter (CB7341E)
This circuit was found in an American publication in 1966. The circuit uses a general-purpose FET that...