Driver Current Regulation:
Verf measures the voltage of Gnd and potentiometer middle.
Please DO NOT connect the motors when measuring the voltage, or it's easy to burn .
Please connect the power supply when measuring voltage as well, do not connect only the USB power.
Please pay special attention to the direction, do not insert wrongly!

Driver Current Algorithm:
I=Vref Default I=1.25A
Parameter:
Default current:1.25a
Max current:2.5a
Logic voltage:3.3v/5v
Input voltage:5.5v-28v
Microstep:up to 1/256
Mode:dir/step,uart
Colour: blue + black
Material: metal

Package Contents:
3 * TMC2209 Stepper Drivers
3 * Big Heatsink