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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

<p>LM7805 does waste energy since it is a linear regulator: It is a self-regulating resistor.</p><p>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 &lt;5V and does not waste this much energy (Normal eff is 80-96% normally).</p><p>something like <a href="http://www.aliexpress.com/item/Auto-DC-Boost-Buck-Converter-Solar-Panel-Power-Supply-Board-090436/553923040.html" rel="nofollow">http://www.aliexpress.com/item/Auto-DC-Boost-Buck-...</a> as an example...</p>