Powering Arduino Uno over CNC Shield V3

Other Hardware Motors, Mechanics, Power and CNC
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I have connected my Arduino Uno with CNC Shield V3 which has 4x DRV8825 step motor drivers. I am just using this combination to run 4x Nema 17s at certain speed. When my UNO is connected through USB and power the CNC Shield V3 with 12V 2A, the system runs perfectly. But I want to use this setup in offline mode, i.e., without connection to the computer with USB cable.

  • Is there a way that I can power the UNO from CNC Shield V3 power input? For Motor Shield V1, I remember that there is a jumper setup for this option, I just wonder if this is possible for CNC Shield V3.
  • Should I power the UNO from power port or are there other possible options?

Thank you.

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I'm also using a V3 shield but I don't remember any 5 volt output on it. Try using an USB charger or a power pack.

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There is no jumper like on the motor shield.

I would not attach the 12V to the power plug or Vin. That would use the weak onboard regulator. I would use a 12V to 5V buck converter and connect to a 5V pin on one of the CNC shield headers.

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