Datasheet

If everything goes smoothly you should see the following (no red error messages) and of course, the red LED on the

trinket will blink on/off once a second

Something Went Wrong!

If you get the error message avrdude: Error: Could not find USBtiny device (0x1781/0xc9f)

That means the bootloader wasn't active. Make sure to press the button on the Trinket to activate the bootloader

before

clicking the Upload button. Also, check that you see the red pulsing LED on #13 that indicates the USB

bootloader enumerated to your computer