This low-power circuit was found in the March 1990 issue of Radio Electronics magazine. It consists of a tone control solution for portable turntables.
This thermometer, which uses common diodes as sensors, was found in a 1975 magazine -...
This low-frequency circuit for alternating signals is from an early American 1980s documentation. The...
This boost amplifier was found in a Popular Electroniics from the 90s. The circuit operates up to...