Introduction: Supercharge and Convert a Unipolar Stepper to Bipolar (28BYJ-48)
this is an easy guide to convert an ultra cheap unipolar (28BYJ-48) stepper to a bipolar stepper
by converting it you will increase the torque from ~ 330 g-cm to ~800 g-cm
since the stepper is super cheap (2-3$) this is an ideal choice for low torque applications. and you will be able to use a4988 stepper drivers
Step 1: Buy Some Stuff
Step 2: Convert It
1- remove the blue covering over the pcb and cut trace as shown in the picture
in the process you are removing the link between the two coils .
2- de-solder the middle wire from the pcb
connect it to the a4988 like a regular bipolar stepper and enjoy;
you might need a cnc shield like this
We have a be nice policy.
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