The most popular RTC for the Arduino is the DS1307. However, it does have some drawbacks, the most notable of which is that its operating voltage is 5v, which means it cannot be used with 3.3v ...

The device has a fixed I2C address of 0x51 (81) so only one RTC per I2C bus can be used. The I2C communication supports 0.9-5.0 V so any 3.3V MCU should be able to connect. Do not forget appropriate ...

Posted in cnc hacks, Misc Hacks Tagged 1307 RTC, arcade machine, bluetooth, DHT22 humidity sensor, Nokia 5110 LCD display, PIC 18F2520 ...

RTCの初期化．引数で false を与えると，時刻設定等を行わなず，インターフェイスの最小限の初期化のみを行うので，RTCに時刻設定を行った後にArduinoを再起動した場合に便利です． 第2引数は，RTCデフォルトのI2Cアドレスを用いない場合に指定してください． ...

– Newt hardware is compatible with open-source Arduino libraries for ESP32-S2, Adafruit GFX (fonts), Adafruit Sharp Memory Display (display writing), and RTC RV-3028-C7 (RTC) ...