Cute little DIY project using 8x8 LED matrix module and nRF24L01.
Project tutorial by Hung-Che
This will prevent you from going back to sleep after snoozing that since now you have to solve a math problem to snooze the alarm.
This trick teaches you how to use Micro SD/SD card for Arduino and speaker.
Project showcase by HUNMAN
It technically is possible. The code would be a lot simpler since you don't need those IR Receiver and Remote stuff.
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