In addition to tone control, this circuit of the SGS 1982 linear integrated circuit manual has a loudness control. The supply must be made with a 24V voltage source.
This circuit is from a Radio Electronics magazine from August 1990. The circuit uses components from the...
The circuit we show is part of an article that taught its complete assembly. The article is from...
This ultra-simple polarity indicator uses common green and red LEDs and can work with 3 to 9 V...