Originally suggested by Harris in the 1990s, this circuit uses an optical tachometer. The circuit is for 12 V motors.
This circuit is from a publication by Newton C. Braga in the United States. The transistor can be...
This circuit is from the Motorola Linear Databook of 1990. The values of the components depend on the...
The circuit shown in the figure generates a rectangular signal that depends on R and C, when its...