This 3-digit digital gauge was found in the July 1900 issue of Radio Electronics magazine. The circuit is based on the CA3161 and CA3162 A/D converters of the time.
This is an amplifier circuit from the 1960s using Sanyo's SK003 15W hybrid module. The hybrid...
Three 4011 NAND gates and two more components - a resistor and a capacitor make this oscillator very...
This bistable touch sensitive must not be powered by a source without a transformer. The outputs can...