Introduction: Green Power Solar Free Energy Generator Homemade for Electricity DIY Recharge Mobile
Green Power Solar Free Energy Generator Homemade for Electricity DIY Recharge Mobile
Materials:
Solar Panel 5 Watt
5 Volt Regulator Board Circuit ( You can DIY or buy from Ebay )
Led Light - USB DC line
Comments
7 years ago on Introduction
LM7805 does waste energy since it is a linear regulator: It is a self-regulating resistor.
It would be much more efficient if a buck-boost or inverting DC/-DC-Converter would be used. a bit more costly, but could also charge if dim light and panel gives <5V and does not waste this much energy (Normal eff is 80-96% normally).
something like http://www.aliexpress.com/item/Auto-DC-Boost-Buck-... as an example...