Found in an Electronics Now from the 90s this mixer has several inputs. The integrated circuit can still be found easy and the power supply need not be symmetrical.
This circuit consists of a traditional version of dimmer with triac and was found in a 2000...
This circuit was obtained in a 1978 magazine, but it can be easily assembled. What the circuit does...
In the figure we have the way to connect an LED on the output of a power source to indicate the...