Arduino Universal Battery Charging Shield update

One of my most viewed projects ever (both on Instructables and Github) is my AVR Universal Battery Charger. It was also one of the very first projects I ever published, so there wasn’t a proper schematics or board layout (back then I simply didn’t care), my code was messy and the hardware had some flaws. … “Arduino Universal Battery Charging Shield update”

Read More

3D printed charger for Yi 4K camera battery

I own an action camera – the Yi 4K – and I am very satisfied with it. However, even though it has longer battery life than a GoPro, it still runs for only ~90 minutes on a single battery. For this reason, I bought a bunch of replacement batteries from Ebay for just 6 dollars/piece! … “3D printed charger for Yi 4K camera battery”

Read More

Multicell Lithium Battery Charging & Balancing circuit

You probably know that charging lithium batteries isn’t particularly easy. But if you have just a single cell, you can get an IC to do this for you – the most popular being probably the TP4056 or the MCP73831 (you can get both of them from Ebay). But if you want to have a battery … “Multicell Lithium Battery Charging & Balancing circuit”

Read More