Reusing the LM4041 voltage regulator to create a precision current source by leveraging the CATHODE pin as a sense pin.

At last, some 'spare' time this weekend, and I learned two things about SCR dc motor control: Permanent magnet dc motors need ...

The resulting 5-Vpp PWM switching by Q1 creates a variable resistance averaged by C1 to R4/Df ... The one pass calibration sequence is: Set Df = 100% Adjust CAL pot for 1.000 amp output current Set Df ...