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 ...

An Arduino library for driving the monochrome Nokia 5110 LCD. It has a rather small footprint and is therefore able to run on many ATTiny microcontrollers. There are many nice libraries for the ...

Inspired by Educ8s.com tutorial, that use a DS1302 RTC module. See his video on Youtube. This modified version works with DS1307 RTC. You must, first of all, upload ...