For this problem first you need to ensure that your connection is correct, the second is aa4988 extremely easy to burn, if all the attachment no problem is easy to burn, you do in the motor power supply interface chip that pick up 8-35 vv must be a large capacitor in parallel, otherwise it is easy to put the motor drive burnt, met the quality good film still perhaps can run twice, poor quality of what reaction also have no!
This is my own experience, have any need to give it a try!!!!!!

CodePudding user response:

CodePudding user response:

If not see you this, I have been going to burn his own hands the fourth module,
The three chip all the way walk good

CodePudding user response:

I have burned out four, beginner's a hole in one step