5v.and 3.3v jumper on a4988

Dear support

what purpose for jumper 5v. and 3.3.v. on driver a4988



The A4988 requires separate motor and logic power supplies, so on our A4988 carrier with voltage regulators we included both a 5V and 3.3V regulator. If you do not want to use a separate logic supply, you should connect either the 5V pin or 3V3 pin to VDD with a jumper. More information about providing logic power to the board is available in the Power Connections section of the carrier’s product page.