This control for bass, midrange, and treble was found in the March 1995 issue of Electronics Now magazine. The circuit requires a dual power supply.
This TTL counter was found in the April 1979 issue of Radio Electronics magazine. The circuit is...
This interesting circuit, from a digital documentation two years 1978 shows how to implement a...
In the circuit shown in the figure, when the input voltage rises to 27 V, the TL431 triggers the...