genuine leadshine stepper motor 42hs08 rated current 1.5 a with 0.6 nm torque body length 57mm

the light of the light-emitting diode is turned on the psensitive tube inside the pelectric coupling device, converted into an electrical signal, and then the power amplifying circuit of the stepping motor is driven, and the current amplifying interface is a pre-amplifying circuit of the stepping motor power amplifier circuit. its function is to amplify the output signal of the opto-isolator to provide a sufficient driving current to the power amplifier circuit.