note

RTCモジュール（DS3231）を試す（1）

DS1302、40NTD（約150円）と格安なのはいいのですが、どうも誤差が大きくて一日で十秒以上もずれてしまいます。およその時間を取得するにはいいですが、 みたいなことをやったところ、誤差が大きすぎて、かなり「残念！」な時計になってしまいました。
GitHub

Clock with alarm built using Ardiuno Uno and built in old pigeon clock

Notifications You must be signed in to change notification settings Clock with alarm built using Ardiuno Uno and built in old pigeon clock with an Arduino, breadboard, RTC module DS3231, LCD display ...
Geeky Gadgets

Arduino Touchscreen Music Player, Alarm Clock (video)

Dejan Nedelkovski has built a stylish DIY touchscreen Arduino music player and alarm clock which has been created using a folded piece of sheet metal to provide a minimalist yet clean enclosure to ...
GitHub

HuzaifaIrfan-Firmware/Alarm-Clock-Arduino

LCD Keypad Shield to display date and time and Alarm controls Android App connected through bluetooth Python GUI App connected through UART/USB Real Time Clock Module Set and Save Alarm Time in EEPROM ...