We obtained this circuit in a technical documentation from the 90's. The circuit has its sensitivity adjustment in the potentiometer. The supply voltage can be reduced with a 1k resistor change.
Suggested by a Popular Electronics, this small amplifier that has a detector to follow RF...
We found this circuit in the November 1992 Radio Electronics magazine. The circuit uses an LDR as a...
We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a...