This is my camera cap charger circuit (the wire goes through the board for wire stress relief) connected to a AA battery (the blue tape is for wire stress relief).

The unique (probably) part of this project is that I used two small magnets from a computer hard drive to make the capacitor detachable.

Remember to comment and rate, Thanks!

BTW Sorry I couldn't get more pics, I was fighting with the camera, it eats those puny AA batteries in minutes
can you 'trickle' charge a capacitor? <br> <br>I understand that a capacitor must be charge by the same voltage that the capacitor can hold before the plates reject incoming. I.e. - a 9v battery can charge a capacitor to 9volts. No more no less. <br> <br>There is though, no mention of amperage. Can you trickle charge a capacitor at 9volts, but 0.001amps, and over time, achieve a fully charged capacitor capable of discharging 9v worth of energy? Or is there a pre-determined 'amp' rating that capacitors must be charged at? <br> <br>Thanks.
Yes, you can trickle charge a capacitor. Just throw a resistor inline with it to limit current. When it is fully discharged it will look like a short circuit, so it'll try to draw the most current there. With a resistor it'll be pretty constant.<br><br>Also, if you charge at too low of a current (very very small) you may experience the leakage overcoming the charge rate, so you may have to feed it more to get to higher voltages.<br><br>Cheers.
what if I trickle charged a 5v rechargable battery, and then released the battery into the resistor? would this work?
That should work.
And would amps be more important, or volts? If stair-step trickle charging? Should I use a something like a 3 volt 45mah battery, or a 3v 7mah battery?
Capacitors charge in a very exponential (I think that's the word) manner, see <a href="https://upload.wikimedia.org/wikipedia/commons/d/da/Capacitor_Charge_Graph.jpg" rel="nofollow">this graph</a>. It really depends on what you want to get out of it, a smaller battery (capacity, mAh) will reduce the number of times you can charge the capacitor, not necessarily the charge rate.<br> <br> Once the capacitor is charged, it is charged. Short it out or put a load on it, either will release the charge.
the big question of the day morning then, is 'how' do I get the battery to do release, upon reaching 5v threshold to the capacitor, so that the capacitor has 400+mf? <br><br>
Or, if the battery is being trickle charged, will the battery's charge feed into the capacitor, and then once voltage is equalized, will the battery then continue to charge - then once the battery is charged higher than the capacitor - the cycle begins anew, until both the capacitor and the battery have equally high charge? <br><br>In essence, if they were hooked up in parallel, would they just 'stair-step' charge themselves to a maximum charge?
i actidently touched the leads of a camera capacitor it scared the S#!T!!!!!! out of me and it left a burn mark on my finger
if you conect the leads or both sides of the flashbulb to wires and re case it you can make a really good shocker. but for more fun with capacitors check out <strong><em>disposible camera coilgun</em></strong> it is awsome.
283 views and no comments? C'mon
Same thing happened to me except ~less~ more views before I had a comment.<br />
~~less.~~<br />
Ah.<br />
but nice idea

About This Instructable




Bio: I am a high school student in Cairns, Queensland. Most of the time I am either at school, sleeping, doing stuff on my computer, making ... More »
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