Datasheet

its safe to use with your sensors and LEDs. On a 3V Trinket, this output will be about 3.3V. On a 5V
Trinket, this output will be 5V so be aware in case you want to swap one with the other. You can
draw up to 150mA output from this pin. If you need more current, you may want to get it directly
from the USB+ pin, which supplies 5V @ 500mA from a computer or wall adapter
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