At long last - I’ve mangaged to create a bespoke device for heartbeat chess. It measures the players heart beats - every 40 beats they get a go, or rather, they can take as many goes as they want for 12 beats. The exact number can of course be changed in the software running the device.

I don’t have time at the mo to write up a full tutorial, but if you want to make one as I have, you’ll need the following components:

• Arduino Uno
• Grove chest strap heart sensor
• Grove base shield - optional but makes things more secure
• 4 LEDs (3 green/yellow, 1 red)
• 9v battery and arduino battery connector
• Piezo buzzer
• Breadboard
• Hookup wire
• 5 resistors (1 x 170ohm, 1 x 470omh, 3 x 820ohm - only needs to be roughly correct)
• A tuperware container to house it
• A drill to make holes in the tuperware.

I’ve uploaded circuit diagrams and the program to upload to the Arduino to the Jokes in Systems git.