This circuit is from 1999 documentation. However, it can still be easily assembled, as all components used are common. The sensors can have their quantity increased, being connected in parallel.
This sensor circuit from a 1967 Ferranti documentation uses components from the era. The circuit...
This circuit was found in the November 1992 issue of Radio Electronics magazine. The circuit has...
This circuit eliminates hiss and other noise from audio sources by cutting frequencies above 10...