This circuit was found in the November 1966 issue of Electronics Now magazine. It uses an LDR as a sensor and has a Bargraph scale with the well-known LM3914.
This circuit shows how to implement a negative resistance device with an operational amplifier. The...
This fast Schmitt trigger operates at frequencies from 10 Hz to 100 Hz, with very short rise time....
This circuit detects the presence of strong signals from spy transmitters, enabling their...