This circuit was suggested by National Semiconductor and is present elsewhere on this site. The LM2575 is not very common today and should be mounted on a heatsink.
The frequency of this circuit can be varied from zero. The circuit uses the CMOS 4046 and was...
This circuit detects the sound of thunder, assessing its intensity and thus the distance of a...
This circuit was found in a 1965 General Electric manual. It is intended for cars that have...