This circuit can be used as an amplifier for musical instruments or even with your cell phone. The circuit is old and was found in the 1990 edition of Radio Electronics Experimenter magazine.
Found in a Popular Electronics from the 90s, this circuit triggers an indicator when these lights...
This common circuit using a multivibrator causes two lamps to alternately flash at a frequency and active...
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...