Originally suggested by Harris in the 1990s, this circuit uses an optical tachometer. The circuit is for 12 V motors.
This powerful sound emitter used in defense to intimidate people was found in a 90s Popular...
This circuit was found in a 1965 Electronic Design. Transistor Q2 must be load dependent. The circuit...
In the figure we have the amplifier application in a NOR gate, with reference voltage equal to the...