This interesting transistor circuit has several effects and an included amplifier. The circuit is monophonic and powered by standard batteries. The number of keys can be changed.
With the circuit shown in the figure, it is possible to connect or disconnect a load controlled by the...
This immobilizer circuit for the car was found in the Radio Electronics magazine of December 1976....
This fast converter using operational was found in a 70s American documentation. The circuit can be...