Beyond that, it is a normal Arduino program and you can do what you like ... connect the 27th bit of the counter to the LED. If it is low, connect the 21st bit. The rest of the code just makes ...

[Chris] wrote us to share a neat technique he has been using to program ... dead bug Arduino (which he calls an Audioino) using a handful of resistors, a pair of caps, an LED, a reset switch ...

Launch the Raspberry Pi terminal. If all goes well, youll spot the Done uploading message in the Console output, and the Arduino will start blinking the LED every second. With that, youre free to ...