That board is an LED countdown timer. Inner circle is minutes. Middle—hours. And outer—days. It’s been a hobby project of mine for a few years, and I’m finally using it day to day at work (pomodoro + meeting timer).
That board is an LED countdown timer. Inner circle is minutes. Middle—hours. And outer—days. It’s been a hobby project of mine for a few years, and I’m finally using it day to day at work (pomodoro + meeting timer).