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<blockquote data-quote="FAST6191" data-source="post: 570174" data-attributes="member: 32303"><p>My DS charger kicks out (or at least the back says it does) 5.2 V and 320ma which is around 1.7Watts.</p><p></p><p>As for capacitors Ta means Tantalum capacitors because while they are fairly expensive they have massive storage for their size (commercial run into the order of a farads/capacitor) and can just about hang in there voltage and current wise not to mention take temperature drops well (-15 to 60 C is about average). Stick a bunch in parallel (a PCB is your best bet here) and you have yourself a nice rechargeable cell.</p><p></p><p>The maths might get a bit tricky (capacitors drain exponentially and the zener diode equations coupled with solar voltages (when accounting for time) is not going to be back of envolope worthy, more a hour in excel/matlab).</p><p></p><p>Edit:</p><p>Yeah when it is done charging it cuts out and wind would likely be nicer to work with (solar is not the best for really small scale things like this).</p></blockquote><p></p>
[QUOTE="FAST6191, post: 570174, member: 32303"] My DS charger kicks out (or at least the back says it does) 5.2 V and 320ma which is around 1.7Watts. As for capacitors Ta means Tantalum capacitors because while they are fairly expensive they have massive storage for their size (commercial run into the order of a farads/capacitor) and can just about hang in there voltage and current wise not to mention take temperature drops well (-15 to 60 C is about average). Stick a bunch in parallel (a PCB is your best bet here) and you have yourself a nice rechargeable cell. The maths might get a bit tricky (capacitors drain exponentially and the zener diode equations coupled with solar voltages (when accounting for time) is not going to be back of envolope worthy, more a hour in excel/matlab). Edit: Yeah when it is done charging it cuts out and wind would likely be nicer to work with (solar is not the best for really small scale things like this). [/QUOTE]
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