How long can you keep an Arduino circuit running on three AA batteries? With careful design, [educ8s] built a temperature sensor that lasts well over a year on a single charge of three 2250 mAH ...

# Nokia 5110 LCD library [](https://github.com ...

mxUnifiedIO device library for Arduino. Device specific driver for the PCD8544 Nokia 5110 LCD display, derived from the Adafruit GFX library. Use SPI shift registers or I2C I/O expanders via the ...