Found in the 1990 special issue of Radio Electronics Experimenter magazine, this circuit uses an automobile ignition coil. Adjustments can be made to suit the coil.
Using a zener diode it is possible to change the linearity of the scale of an analog instrument by...
This circuit causes the relay to be energized when the input voltage exceeds the voltage value of...
This circuit can be used in 0,5 to 37 V Power supplies and output currents up to 3 A. The...