This circuit detects changes in the active cycle of the input signal. The circuit was obtained in a 1966 EEE. Transistors are general purpose types of the time.
This distortion circuit was found in an American publication from 1970. It can be assembled with...
This low-current power supply was obtained in Japanese documentation from 1968. The currents are...
In this circuit the output voltage depends on the light that falls on the LDR, decreasing when the...