-The Arduino Nano 33 BLE Sense Rev2 operates at +3.3 VDC. Never apply more than +3.3 VDC to its digital and analog pins, as higher voltages will permanently damage the board. The 5V pin (between RST and A7) is not connected by default as a safety precaution. To enable the +5 VDC output on this pin you can create a solder bridge on the VUSB pads or power the board via USB (+5 VDC will not be available when powered through VIN). The 3V3 pin is always available and provides sufficient current for sensors and actuators. When interfacing with +5 VDC systems, use appropriate level shifters to protect the board's inputs.
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