Wouldn’t you like to have a flashlight that does not need batteries that will last a lifetime? Wouldn’t it be great if you didn’t have to shake it every few minutes to keep it lit up? Then what you need is a super capacitor flashlight.

<p> Drakekay,</p> <p> I have been running tests with different motors of various sizes.&nbsp; I have a test set up with a large wheel with a crank/handle on it to step up the rpms on the motors I have tested.&nbsp; It is easy to light up leds with motors but charging a large super-capacitor is a lot harder.&nbsp; My goal is to get 1 hour of light for 2 minutes of cranking.&nbsp; I have only one motor (out of the 20 or so I have collected over the years) that is big enough to meet the goal but it is too big to be portable.&nbsp; I have given the half-hearted effort to making a generator but that has not met my goal.&nbsp; For now I am not pursuing it since the overall goal was to have a way to have lighting off the grid and without batteries for an extended period of time if necessary.&nbsp; That goal can easily be met by having:</p> <p> &nbsp;A solar panel as small as 5 watts</p> <p> A junky old car battery (does not have to be good enough to start a car).</p> <p> A 12 or 14 volt linear regulator (LM7812, LM7814)</p> <p> A charging circuit for this flashlight.</p> <p> And a couple of super capacitor flashlights.</p> <p> &nbsp; </p> <p> So since I have the great big motor in case there is a problem with the solar panel / car battery set up, I&rsquo;m still prepared.&nbsp; If I do pursue the generator thing in the future I have my eye on this one to connect to a bycicle:</p> <p> <a href="http://www.small-generator.com/Small-Alternator-YAF-80B.htm" rel="nofollow">http://www.small-generator.com/Small-Alternator-YAF-80B.htm</a></p> <p> $49.00 here:</p> <p> <a href="http://small-generator.com/buy/index.php?main_page=product_info&cPath=1&products_id=9" rel="nofollow">http://small-generator.com/buy/index.php?main_page=product_info&amp;cPath=1&amp;products_id=9</a></p> <p> I Think I will only be needing 2- 3 amps at under 6 volts.&nbsp; After 2-3 minutes on the bike I get on with my life.&nbsp; Thanks for the comment Drakekay.</p> <p> </p>&nbsp;
<p> <br> <span lang="EN">The Solar set up mentioned in the Sep 10, 2012. 7:03 PM comment is here:</span></p> <p> <font color="#0000ff" size="2">&nbsp;</font></p> <p> <a href="http://www.instructables.com/id/Uses-For-Dead-Car-Batteries-And-Sealed-Lead-Acid-B/?ALLSTEPS/" rel="nofollow"><u><font color="#0000ff" size="2"><font color="#0000ff" size="2"><span lang="EN">http://www.instructables.com/id/Uses-For-Dead-Car-Batteries-And-Sealed-Lead-Acid-B/?ALLSTEPS\</span></font></font></u></a></p> <p> <font size="2"><span lang="EN">&atilde;€€</span></font></p>
<p> By the way if you don&rsquo;t want to build a supercapaitor flashlight but you would like to own one, here is a review of the Lightstorm CL1 flashlight with a crank:</p> <p> &nbsp;</p> <p> <a href="http://www.youtube.com/watch?v=b7Pw6xURVT0" rel="nofollow">http://www.youtube.com/watch?v=b7Pw6xURVT0</a></p> <p> It looks like a good option if you don&rsquo;t mind winding every 20 minutes. The high beam appears to be very bright. It is a mechanical device with gears so it will wear out over time if used often. Perhaps owning both is the best of both worlds. </p>
Hey Luxstar, Greet concept. :D Why not add a hand turned rotor with magnets attached to it, encased in a coiled stator to charge that cap?
<p> Note: When I ordered my capacitors I accidentally clicked on the 2.5 volt capacitor instead of the 2.7 volt. They make both. So I am stuck charging at 2.5 volts. Don&rsquo;t make the same mistake I did.</p> <p> Lux</p>

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