This 1974 circuit uses two 555 integrated circuits in a very traditional configuration. The circuit can be powered by voltages from 9 to 12 V and for greater volume an amplifier stage can be added.
This dynamic mixer allows for smooth adjustment of the signal's passage from one channel to...
Using this circuit a low current switch can be used in the control of heavy duty loads, powered...
We found this circuit in an old American documentation for hams. The circuit serves as a telegraph...