Published with a power amplifier in the January 1985 issue of Radio Electronics, this circuit indicates overexcitation by a strong signal that causes distortion.
The figure shows how to obtain a capacitance digitally with 4066 switches. The table shows the...
Scratch is the scratching noise that occurs mainly with old records. This high frequency noise is...
The sensor of this circuit can be any phototransistor and the SCR can be the TIC106. The circuit and...