Dc to usb converter.
Diy solar panels charger.
For lighting with this same battery.
The second would be with the same solar panel but to charge 3 7v lithium batteries.
For simple smartphone charger.
Rocio with diy solar charger the author s wife rocio and their golden archie show off a diy solar charger with internal aa batteries for powering an iphone.
Cost is less than 30.
With 4 high brightness leds.
I have a kit.
The first would be using a 6v 1w solar panel.
Diy solar usb charger altoids step 1.
What you ll need 6v mini solar panel 5v step up inverter usb charger circuit your charger cable flexible and foldable plastic card such as an old credit card.
How the tp4056 work.
These boards gets.
The central brain of our project is a dc to usb converter circuit.
I can make one for under 10 when i buy parts in bulk.
Thank you very much in advance.
With a few odds and ends from around the house this build can be done for about 10.
Looking at this board we can see that it has the tp4056 chip along with few other.