Program only runs on USB power?

MickTheMechanic / Shiftlight

An opensource shiftlight project using Arduino and Neopixel products

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Program only runs on USB power? #1

Closed drftrds87 closed 3 years ago

drftrds87 commented 3 years ago

I'm trying to use an external power source to power the Arduino nano but the program will not run with an external 12v to VIN. Any help would be appreciated.

MickTheMechanic commented 3 years ago

You cannot run the Arduino Nano on 12v, it is a 5V Board. You need to build the circuit shown in the schematic, there is a voltage regulator included (LM7805).

You may need to purchase a new board, I would imagine the 12v directly to VIN has done some permanent damage.

MickTheMechanic commented 3 years ago

Also note: the LM7805 has NO polarity protection, if you accidentally switch the wires during installation, the regulator will be permanently damaged