This circuit supplies a continuous voltage at its output, which is the peak value of the alternating input voltage. The circuit is from a 90's EDN, making use of Maxim integrated circuits of the time.
This lie detector was obtained in a Japanese publication in 1967. The component with a different symbol...
This crystal-based circuit can generate accurate 50 or 60 Hz signals. The circuit is from a...
This circuit with 117 V output was found in a 1969 Electronic Design. Drive transistors admit...