This motor speed control with tachometer sensor was found in the 1993 Radio Experimenter Special Projects. The maximum current is 2.4 A.
We found this circuit in the 1982 SGS Linear Integrated Circuits manual. The L78xx is equivalent to 78xx...
We found this circuit in Radio Electronics magazine from October 1962. The article announced the...
This sequential relay actuation system circuit for traffic lights was found in Electronics Now...