We found this circuit in the June 1991 issue of Radio Electronics magazine. The circuit can be used with a resistive sensor or in demonstrations.
This fish flame circuit was found in a 1971 magazine. The circuit can still be mounted with BC558...
The purpose of this circuit is to amplify the signal of a medium or high impedance microphone,...
This simple circuit is from documentation from 1964. It can be created with current transistors. It...