This is a very simple countdown timer I build with my daughter every year in the fall to make 16x2 countdown timers for Halloween, Thanksgiving, Christmas, and her birthday. I used the schematic from ...

We selected Digispark(Default-16.5MHz) option. Click Sketch/Upload options from Arduino IDE. You will be prompted to connect Digispark board to the USB port of your PC. As soon as the board is plugged ...