This circuit has a gain of 6 dB for low frequencies from 85 Hz and can be used in a mini subwoofer. The circuit is from a Radio Electronics from March 1990.
This transistorized oscillator, a modification of the Colpitts oscillator, was found in the...
This simple 2004 circuit uses a common sensor used in television and other equipment. It checks...
This crystal oscillator circuit for equipment calibration, generates a 100 kHz signal from a 1 MHz...