Using 4 operational amplifiers this circuit generates 4 different tones. The circuit is from an American documentation from the 90's. Operational amplifiers are tTL084.
This traditional detector configuration is from an old publication where the MC1555 is the...
In the circuit shown in the figure, the diode operates in the generator mode, that is, generating a...
This sewing machine motor control was found in the December 1997 Electronics Now magazine. The...