Blinking LED?

When I connect the Arduino to my laptop, the LED blinks 3 times and goes out. If I disconnect the Arduino and reconnect, it blinks 3 times again!!

bekathwia8 months ago

Yep, that would be the chip running it's startup routine, which flashes to let you know it's on and checking for a new program through the USB cable. If no code upload is detected, it then goes on to run whichever program has been uploaded most recently!