Posted in clock hacks, LED Hacks Tagged 7 segment LED display, arduino nano, clock, DS3231, led, neopixel ring, Neopixels, ws2812b ...

For those of us who remember LED calculators, the HP 5082-7400 series red “bubble” displays hold a special charm. Available in 3, 4, or 5-digit varieties, these multiplexed 7-segment displays ...

By using these driver ICs, the complexity of wiring and control is significantly reduced. “I’ve built a digital clock made out of 144 seven-segment displays controlled by an Arduino Nano.