LED Monitor for Stepper Motor Operation (MEC166E)

This circuit was included in my book Robotics, Mechatronics and Artificial Intelligence (sold out) published in the United States. It can be used in mechatronics or robotics projects or as a building block for more simple projects. 

The circuit shown in Figure 1 can be used to monitor the operation of each phase of a stepper motor. The LED corresponding to each phase will glow when it is activated. The resistors’ value depends on the power supply voltage .



Figure 1    LED monitor.
Figure 1 LED monitor.