Capacity meter


In Polish magazine 'Elektronika dla Wszystkich' ('Electronics for Everyone') there's a 'Constructors School' section with new design task given every month. In March 2014 the task was to design a device to measure capacity of lithium betteries. I decided give my skills a try and built the circuit described below.


What I've learned

This project was interesting for me as it combines two worlds of electronics: digital and analog. I learnt a bit about R-2R DACs and designing simple transistor circuits.