Found in a Popular Electronics from the 90s, this circuit applies to flashes with xenon lamps. The transistor admits equivalent and the phototransistor is of the Darlington type.
The A3906 integrated circuit from Allegro Microsystems (www.allegromicro.com) consists of a PWM...
This Hall effect sensor circuit was found in the July 1998 issue of Electronics Now magazine. It...
This circuit was found in an American 1980s documentation. The transistorized step is the...