Collaborate Disseminate
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) …read more Continue reading Restoring a Vintage German EV
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 …read more Continue reading Converting On-Grid Electronics To Off-Grid
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, …read more Continue reading This Open Hardware Li-Ion Charger Skips the TP4056
For the price of a mid-range Android phone, [Kenneth Finnegan] turned a 50 caliber ammo can into a 50 amp-hour portable power supply. The battery pack uses four 3.5 V LiFePO4 cells wired in series to achieve a nominal 12 V supply that stands in for a traditional lead-acid …read more
Continue reading Ammo Can Battery; 50 Ah LiFePO4 Clad in Army Green
Over the last decade or so, battery technology has improved massively. While those lithium cells have enabled thin, powerful smartphones and quadcopters, [patrick] thought it would be a good idea to do something a little simpler. He built a USB power bank with an 18650 cell. While it would be easier to simply buy a USB power bank, that’s not really the point, is it?
This project is the follow-up to one of [patrick]’s earlier projects, a battery backup for the Raspberry Pi. This earlier project used an 14500 cell and an MSP430 microcontroller to shut the Pi down gracefully …read more
You can go to any dollar store, gas station, big box store, or your favorite Internet retailer and get a USB power bank. It’s a lithium battery mashed into a plastic enclosure with a USB port, probably poorly engineered, but it does serve as a great power supply for the Raspberry Pi. For the Raspberry Pi Zero contest we’re running over on hackaday.io, [Patrick] built a lithium phosphate battery pack that’s much better engineered and has some features a simple USB power bank will never have.
[Patrick]’s Raspberry Pi UPS isn’t just a battery and charge controller attached to the …read more
