Chriszz11 Posted October 2, 2011 Share Posted October 2, 2011 I am builing a coilgun, and was looking into getting more powerful capacitors. i am using a normal photoflash charger, and 10 parallel wired flach capacitors. The capacitors i was looking into getting, are from radioshack, 1000uf 35v or 50v. Would my flash charger still work with these capacitors, or would i need to get a new charger? also if i get ten of these and wire them together, it would still have 10000uf and 350v right? that could come to 1250J energy stored. Link to comment Share on other sites More sharing options...
TonyMcC Posted October 2, 2011 Share Posted October 2, 2011 The capacitors i was looking into getting, are from radioshack, 1000uf 35v or 50v. Would my flash charger still work with these capacitors, or would i need to get a new charger? also if i get ten of these and wire them together, it would still have 10000uf and 350v right? that could come to 1250J energy stored. You can have 10000uF with a working voltage of 35V (parallel connection) OR 100uF with a working voltage of 350V (series connection). You can't have it both ways! Link to comment Share on other sites More sharing options...
Chriszz11 Posted October 2, 2011 Author Share Posted October 2, 2011 oh my appologies. i am a little new to this. the bank i am using now is made of 10 330v 120uF caps. and i charge it to 600v. what would you recommend that i do? Link to comment Share on other sites More sharing options...
Chriszz11 Posted October 3, 2011 Author Share Posted October 3, 2011 i just built a new capacitor bank, out of 18 photoflash capacitors. I lost some power from the gun. Could anyone tell me why that happened, and how i could fix that problem? Would increasing the coil wire size help? Link to comment Share on other sites More sharing options...
lightning diety Posted June 4, 2012 Share Posted June 4, 2012 there is a video on instructables.com at http://www.instructables.com/pages/search/search.jsp?cx=partner-pub-1783560022203827%3Anpr2q7v5m6t&cof=FORID%3A11&ie=ISO-8859-1&q=coil+gun, this website is great because it can help with a lot of projects in any number of fields Link to comment Share on other sites More sharing options...
Enthalpy Posted July 19, 2012 Share Posted July 19, 2012 First, put a string of resistors in parallel with your capacitors if you connect them in series, so the resistors will share the voltage equally, or it's guaranteed to end in a bang. Then, you need something to discharge the capacitors automatically, for safety. Don't forget that chemical capacitors have a memory effect: some charge (like 10% of the voltage) reappears slowly after you discharged them and open the circuit. And finally, you should have a look at the energy and capacitor size needed to make even a miniature coil gun. Link to comment Share on other sites More sharing options...
Lance Posted January 20, 2013 Share Posted January 20, 2013 i just built a new capacitor bank, out of 18 photoflash capacitors. I lost some power from the gun. Could anyone tell me why that happened, and how i could fix that problem? Would increasing the coil wire size help? The discharge time was too high. Thicker wire, more voltage, or less capacitance. Link to comment Share on other sites More sharing options...
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