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Some good Projects 

http://www.techzonemind.com/solar-powered-water-level-sensor-module-using-esp8266/
https://jjssoftware.github.io/esp8266-lithium-charging-breakout-pcb/
http://sq5eku.blogspot.tw/2017/01/solar-powered-esp8266-weather-station.html
https://www.youtube.com/watch?v=KoHtxZG7leQ DIY: Lithium 18650 Cells Charger By Using TP4056 Modules
 

 


 

 

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