LED projector clock
Description:
My bedroom wall projector clock stopped working (not repairable), and I decided to try to build my own model, and this is the result. It consist of a very bright red LED seven segment display with a I2C backpack from adafruit, a DS3231 RTC from eBay, an Arduino Uno, a magnifying glass and a prototype case made of LEGO. Don't worry this is only a prototype I made to show the concept, we plan to build a more finished version with aluminium case later when we have better time :-)
In the meantime feel free to download my code and try to improve it!
Picture gallery:
Click on the picture to enlarge it and read our comments and advice
The realtime clock chip DS3231 has an onboard temperature sensor to compensate the xtal oscillator, and make the clock more accurate. This is readout of this sensor pretty clever.
Check out this video of the LED watch filmed upside down and in a mirror.