If you want really minimal, you could go with a 4 LED clock (but you better know the resistor color code). Of course, an ESP8266 can serve as a simple clock and it gets set via NTP which is even ...

It will be a clock that uses a 50cm wide tube surrounded by glow-in-the-dark tape and uses 96 UV LED’s and a stepper motor to print the time/text. I hope to have it finished within a few weeks.

Brent Graham's clock is as unusual as it is beautiful. ... Once the model was completed, it was only a matter of applying the appropriate code to the arduino for control over the LED lights.

The clock displays the time from the top of the minute to 15 sec in, and then displays the temperature (F), then back to time until the bottom of the minute (30 sec.), then it displays atmospheric ...

“So for instance, you can have one Arduino with a button, another Arduino connected wirelessly with an LED, push the button and turn on the LED without any additional single line of code to handle the ...

The Arduino binary clock shield has been made available via the Crowd Supply website with preorders starting from $33 and worldwide shipping available from $6, and commencing during August 2019.

The idea here is to use a cheap clock from IKEA, wire in a bunch of LEDs, connect and Arduino, and then use the 1Sheeld to trigger color changes depending on the traffic time between two points.

The Arduino uses latitude and longitude to help decide when to click on the lights, so it's incredibly accurate. Otherwise, the build just includes an on/off switch, a Tiny RTC, a time adjustment ...