A linear regulator is the wrong way to go. You will dissipate most of the energy in heat. What you want is a switching regulator. The easy way to go is to pick up on of those USB chargers for the car and hack it apart. They are designed for 12V in and 5V out. They usually use a 34063 which is an older switcher and not the most efficient. You could also pick up full modules from eBay or just build your own.Hi.
Have this solarpanel that generate 12-30v with no load,
How would be best to extract 5v 500mA from this.
Either with 7805 or zener diode, or any ???
Ah, OK. It's difficult to get enough light to simulate sunlight.Have no sun these days in denmark so use very bright light to light the panel up.
Ah, 14 x 20 inches, yes, that makes sense. Kyocera is also a reputable manufacturer.apologies, google matches are so .....
only looked for the wattage rating, didn't check the size that was imperial :/
on a good note, got the new transition glasses today
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by Jake Hertz