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This circuit will allow you to control the speed of an AC motor, for example an electric drill. The way that this circuit works is as follows. The bridge rectifier produces dc voltage from the 120vac line. A portion on this current passes through the 10K ohm pot. The circuit comprised of the 10k pot, [...]
I got this from a dosing pump control circuit.
Source
Stepping motors fill a unique niche in the motor control world. These motors are commonly used in measurement and control applications. Sample applications
include ink jet printers, CNC machines and volumetric pumps. Several features common to all stepper motors make them ideally suited for these types of applications. These features are as follows:
1. [...]
