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.
With the shadow over the sensor, it is possible to interrupt the sound of your amplifier using this...
Some old analog multimeters use a 22.5 V battery for high resistance measures. These batteries can no...
This circuit can be used in an experimental link for educational purposes. based on an integrated 4093....