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.
This circuit, when connected to the 110 V power grid makes it possible to test capacitors with...
We can make an oscillating relay producing a rectangular signal taking advantage of the inductance of...
This basic voltmeter circuit has an input resistance of 2 M. The instrument is 100 uA and the...