This sensitive receiver for the medium wave range was found in Radio Electronics magazine from December 1960. The circuit has a headphone output and is powered by just 3 V.
This low frequency circuit was found in documentation from the 1980s. The values of R and C...
This source for devices for automotive use was found in a 1985 documentation. The power...
Found on Popular Electronics in the 1980s, this circuit detects a change in air pressure using a...