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## making a coil gun help

when i make a coil with magnet wire,i have enamelled wire, do i have to sand the whole thing so the copper touches in the coil, or just the ends going to where im hooking it up? EDIT: i changed my title, because i have more questions about coil guns in general.

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MJRSnyder8 years ago
is there a way that I could charge some 200v 330uf capacitors from an old PC power suppy with the camera flash circuit? because it charges up to around 330 volts and i don't want to hook up my other capacitors to that much voltage
um0123 (author) 8 years ago
if my capacitors are rated at 330V and i have a 250 V switch, will it lessen its power?
8 years ago
lets just say this switch will fuse and won't work. you need to use an scr
8 years ago
as in you will fuse the contacts together
um0123 (author)  guyfrom7up8 years ago
yea i know what fuse means. what about a switch rated at 350V? but the amps you go the lower the voltage rating, and i dont know how much amps 20 capacitors will generate.
8 years ago
high current rating is more important than voltage current is what fuses stuff
um0123 (author)  110100101108 years ago
well its 20 capacitors, but its only powered by a d-battery, so the voltage is only 1.5 V, i think i should switch to a 9 volt to make the coil more powerful, my firing swtich its rated at 50A 12VDC and 25A 24VDC so i think im good.
8 years ago
the voltage in the capacitors depends only on the inverter circuit. you can make 300 V and more with either D or 9 V battery the D battery stores more energy than 9 V. it will last longer (more shots off 1 battery) the current of the switches is not bad but the voltage may be too low. 300 V is at all not 12 or 24 can you give photos of the switches from inside ? maybe they are isolated enough for 300 V after all
um0123 (author)  110100101108 years ago
i cant take the switch apart, but the guy at radio shack said if im charging the capacitors with - lets say - 1.5 volts, the charge that comes off the capacitor will be 1.5 volts. he also said that there is no such thing as a switch that is rated at 330V or higher. he said try online, but normally nothing requires that much. whats an inverter circuit?
8 years ago
why you cant ? an invrter is a circuit that changes voltage. its basically built of transistor and transformer. sometimes more components in a coil gun it converts the battery voltage to 300 V that are charged into the capacitors they are used also in lcd screens / computers (the power supply is basically an inverter) / flash cameras / emergency lighting systems and other stuff you can get high voltage high current switch in industrial electrical parts center. but you often can use smaller switch
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