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Tiny Electronic Dice @ZakKemble

Zak Kemble designed a simple, tiny electronic dice project using 7 LEDs, an ATtiny25V, a CR1616 coin cell and a few passives. Measuring just 18mm x 18mm and 4.9mm thick while weighing 2.1g.

There’s only one button, the roll button, which when held down will cause the dice to roll through numbers 1 to 6. After releasing the button the rolling will slow down until the last change where it will instead use a randomly generated number sourced from an XORShift random number generator algorithm.  The final value flashes a few times, then after a further few seconds the dice turns off.

Full details on Zak’s Electronics Blog.


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