This circuit was obtained from the March 1994 Electronics Now magazine. The circuit uses a common transistor which can be a low noise type such as the BC549.
This circuit separates the bass from the treble in an audio signal. The circuit is from a Hands On...
We found this circuit in the November 1992 Radio Electronics magazine. The circuit uses an LDR as a...
This simple circuit controls the signal amplitude through a photoresistor optical coupler. The...