This circuit was found in February 1976, Radio Electronics magazine. The components are from the time and are based on the 555. The power supply must be provided with the indicated voltages.
This circuit uses a 555 (according to the diagram) to generate 50 ms tone bursts at a frequency of 1.5...
The input frequency of a signal applied to this circuit will be divided by one to 9999 in this...
This circuit is the conventional use of the 7805 as a constant current source up to 1 A. The...