This circuit consists of a bass filter that can be used as a subwoofer in a sound system. The circuit is from a Radio Electronics from May 1988.
Found in American documentation from the 1970s, this circuit employs an integrated circuit from...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This assembly circuit using a small motor as a generator was found in Radio Electroics magazine from...