This HeNe laser power supply was found in the March 1989 issue of Radio Electronics magazine. This power supply generated a few thousand volts for gas ignition.
Found in the American 73 magazine for radio amateurs, this circuit can test common quartz...
This circuit for the automatic activation of a small lamp (or high brightness LED) was found in...
This circuit provides a 5 V negative output with a maximum current of 1 A. The circuit is from the...