Restoring A Vintage German EV

When you think of EVs from the 90s, GM’s EV1 may come to mind, but [bleeptrack] found a more obscure CityEL three wheeler to restore. This Personal Electric Vehicle (PEV) is no spring chicken…

Converting On-Grid Electronics To Off-Grid

Husband and wife team [Jason & Kara] hail from Canada, and in 2018, after building their own camper, sold up their remaining earthly goods and headed south. If you’re not aware of them, t…

This Open Hardware Li-Ion Charger Skips The TP4056

There’s a good chance that if you build something which includes the ability to top up a lithium-ion battery, it’s going to involve the incredibly common TP4056 charger IC. Now, there&#…

Are LiFePo4 Batteries better? How to Use them For Small Projects

For years we have used rechargeable Li-Ion batteries for our projects. They are widely available, but are they still the best solution? Let’s have a closer look at the newer kid in the block, the LiFe...