I found tis circuit in na old documentation from 1958. The circuit uses germanium transistor availble that time and hard to obtain today. The circuit is indicated for phono applications using variable reluctance transducer.
This circuit activates an incandescent lamp at dusk and goes out at dawn. The sensor is an LDR and...
This circuit that simulates the sound of a drum is part of an article published in the Radio...
This version of the Pierce oscillator with the 2N3904 was found in the January 1994 issue of...