This circuit is placed between the instrument pickup and the amplifier input. The same version can be found from other sources in this section. This is from an English magazine from the 80s.
This simple tester was found in a Popular Electronics from the 90s. The circuit is powered by two 9 V...
This circuit was found in a PC documentation from 1996. It can be used as a shield with modern...
This limit alarm was found in a 1980s US documentation. Comparators can be equivalent and the...