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Crystalfontz CFAF240400C0-030SC-A1-2 - Quick Start Guide Step 3 - Make sure the voltage selection switch on the Seeeduino is set at 3.3V. Step 4 - Connect the Seeeduino to a 5V power supply using the USB cable. The 5V power supply can be a computer, bench supply, a plug-pack style power supply, or similar.
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