About: I'm a maker and engineer... I make mad stuff... check out Dubious Engineering on YouTube

I have had enough of buying cheap solar phone chargers that do not work, and have developed my own.

Ingredients...

Clear plastic PELI case available on eBay.

Arduino NANO available on eBay.

0.96 inch OLED Display - available on ebay and adafruit

Simple SPST Switch

2.5v High power 3 watt LEDs

Solar panel (approx 6v 100mA) that fits the PELI case lid

4.3volt Zenner diode

1N4148 silicon diode

18650 holders, 18650 batteries available on eBay

5 volt 2 amp USB regulator charger available on eBay.

Please read-on for instructions on how to make this! Also, the code for the arduino for this project can be downloaded from GitHub and is included in the following pages.

Once the switch is turned on, the OLED display shows On-Time, Battery Voltage and % charged.

Overcharge is prevented by the 1N4148 and the 4.3v Zenner diode.

This has also been translated into Chinese by my wonderful wife-to-be!

I have a YouTube channel that includes a video overview - please see below... Please subscribe to my Instructables site and my YouTube channel (link below) to see more mad maker projects in the future!

https://www.youtube.com/user/howitee

我受夠了會買到一些不能用的太陽能充電器，所以自己研發。

組成配件:

透明的PELI盒

Arduino電路板

開關鍵

二個高功率LED燈

太陽能板 (需能置入 PELI盒蓋)

一些18650電池座

一個5伏特的USB調節器充電器

完整的視頻說明如下...