This charger was found in the February 1978 issue of Radio Electronics magazine. The circuit is for low current, only 150 mA, and has a 12 V transformer in the power source.
I got this circuit from an English magazine from 1977. It can still be easily assembled, as the...
This two-phase stepper motor circuit was found in an old documentation using an operational amplifier...
This circuit can generate pulses whose width is controlled in the 100k potentiometer and the...