steven

:)audio guru there we are 3.0 amps forward current ha ha ha ha as said and the wire size of the diode well my 10 watt resister has bigger legs than that. oh thats a good idea that used car parts hey well im looking for a v8 engine to put in me coilgun to drive it to the test zone lol ha ha ha ha

:)heres the more detailed bit of the circuit i borrowed the 3 diode idea from

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:)audio guru those 1n5408 diodes in my dicksmiths catalouge says they are rated at 3 amps so i dont know where ya got the amps details on them from, as for the diodes well i got the idea of useing three of them from the circuit schematics for the high velocity electromagnetic launcher or ring shooter so i thouth id borrow that and use it for this coil gun gee it sure goes better now anyhow that circuit i posted agers ago to the topic chargeing of capacitor by bakr its in the high voltage stuff section as for the circuit i used to charge the capacitor with not includeing the modifications here it is

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:)heres the latest picture, this time ive solderd the protection diodes in place and ran the input wires to the coil , i used 3x 1n5408 diodes and when i charged up the 200 volts 1200uf electro and dumped the charge into the coilgun it went faster, maybe the settings on the high voltage photo flash capacitor charger, i got in the right positions so i got a better charge

:)hello mr heckles ive just biult my first coilgun really simple to and ive been testing it and i used the high voltage photo flash capacitor charger, which allso charges non photo flash capacitors and i get great results to ,

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:)the high voltage photo flash capacitors dont take to long to charge up, but there values aint so high so at 330 volts they charge qiuckly. but when i use an electro like 1200uf at 200 volts they take longer to charge as it seems but the charger neon dosent come on then, so the capacitor charge indicater would have to be relyed on to light up its led when the charge in the higher value electro is high enougth. now heres what ive tested the charged up 1200uf 200 volts electro on after i charged it for a short time without waiting for the neon to come on , and without setting the capacitor charge indicater to flash its led when charged up to certain voltage. now its my first super simple coilgun here so i needed a charged up capacitor to test on it so the high voltage photo flash capacitor was perfect for it , the coil i dident have to wind as it was allready on the plastic roll and the 16 or 18 gauge wire on it was ok and the black thin tube for projectile launching was a perfect fit , through the center hole in the plastic reel with the wire allready on it so i used a short screw and charged up one 200 volts capacitor at 1200uf and then dumped the charge into the coil and the screw shot out about 5 or more feet before it hit the cuboard so it works great for a coilgun power source so ill be doing some more construction here to make and test a ring launcher useing the same high voltage photo flash capacitor charger

easy to make and non conducting and can be made to hold any shaped capacitor , more to come yet .

:)thankyou audio guru im working on it ill post details and pictures when all done and finished

:)i did some more tests with the high voltage photo flash capacitor charger, now if i hook up a photo flash capacitor to the charger outputs when it charges up the neon comes on and when i put a 1200uf large 200 volts electrolytic capacitor the neon doent come on in the same time frame as it dose when i charge the photo flash capacitor up in. but anyhow i used my judgement and assumed the cap had got enougth charge in it so i isolated it from the capacitor charger and used the charge to test an exsperimental coilgun with it , i used a pen caseing and wound ignition coil wire about 66 turns thats ten turns then another ten on top of that and so on and the last 6 turns on top then i use a short thin steel thin screw and inserted it into the coil so its front was about half way inside the coil then i dumped the charged 1200 uf 200 vdc cap intoi it and it flew 5 and a half feet so it worked , even though the coil could of been made with a better gauge wire , more thicker. and i charged a photo flash cap up of unknown value and tried the same thing i discharged it into the coil with projectile in it and it flew out a short distance for the ,low value of the photo flash cap, at 330 volts ,

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:)heres a view to illiustrate what they look like from above with the electros removed . by the way these electro holders are for an exsperimental coil gun i plan to biuld

:)its allways handy to have a electrolytic capacitor holder , especially if you want to isolate the electro from the main board in oder to make more space on the same main board, in the back ground of this picture is another capacitor holder made to hold 2x 40 volts 5800uf electros

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in this picture is a capacitor holder made from a flattend peace of pvc water pipe, the same stuff i used to make the home made pvc circuit boxs , the electrolytic capacitor i made the holder for is a 400vw 22o uf and on the right is an allready cut pvc peace that needs to be heated to soften it then wrapped around the electro and held till its cooled down and gone hard then the bottom bits where the srew holes go these are bent out with a pair of pliers

now to put some more exsplanation into this ,to strt with the circuit box is my home made circuit box made from pvc water pipes and the framework is plastic corcner moulding , the circuit board is a prototype circuit board and i used tinned copper wires for the tracks, and the timer inetergrated circuit is at the front plugged into a timer socket soldrd to an ic mounting board , so changeing it is easy so its a matter of unplugging it and pluging in a new one when needed and the wires run to the main board where the matrix pins are and the ifr540 n channel mosfet is at the rear its attached to a heatsink and the wires run from it through 3 tniy holes to the orange mov on a tag strip the mov protects the mosfet and the wires run from the tag strip to there positions on the board so less components on the board make it easyer to biuld , the mosfet and the timer would be the most likely parts to ever go first so they are exsternal so replaceing them is easy , with the mosfet just unsolder the 3 wires and undo the nut and slip it off and place a new one on , you can use the irf7040 n channel mosfet to , i used bits of pvc cut to shape and heated till its soft and with a screw driver and pair of pliers shaped them, to use as wire holders to secure them to the inner box

here is the finall picture of the latest high voltage photo flash capacitor charger fully tested and working great

welcome to the world of the mystery electrical phenomenas audio guru. a static charge biult up on your body from combing your hair , i thought would of been hard to measure , even with a multimeter as it wouold disharge so fast even the mioniute you grab ya meter , back in school i used to rub my shoes on the nylon carpet and generate a charge in my body which i discharged into the legs of the girl sitting next to me , and my nabour told me of an incedent where a fellow who wore highly static conductive clothing and generated in school a charge so big that that he actually threw a small ball of electrissity from his fingertips , and i read article some years ago about a perth mechanic here in western australia , whos wife works in a synthetic cloths factory and she even wares these synthetic cloths and everytime she walks across the carpet she generates a charge so big that it even opens the gararge roller doors and would even interfear with the computer and every time he touches her when he wants to get in the mood he describes it as like touching a power socket , as for the charge of static biult up on a comb , only so small i can pick paper up with it but cant even get a spark out of it , so wouldent you think that if a fleece jacket is made of highly static conductive matierial , much bigger than a tiny hair comb would act as a static capacitor and hold a good charge like that and if the air was a bit dryer it wont leach away so it would biuldup more when the man walks on the carpet and if he hops into his car which is insulated from the ground so even a car biulds up a charge as i get shocks on my mums car when i get out so the cars that dont have the static discharge trap runing to ground under them here just seem to act like capacitors for more static charges

today is sunday 18th of september 2005 and this article i cut out of the sunday times here in perth estern australia australia , yous might find this article intresting to say , and relates to high voltage to

audio guru this circuit seems to take a little longer to charge the cap but im exsperimenting with the setttings to get it charged faster i used a 3 way togel switch with center off position to test the capacitor and after that i leave it on more till it charges the capacitor back up as it seems to drain the capacitor a fair bit when i used the charge indicater circuit , unlike before ,with the other capacitor charger the capacitor charge indicater works great with the c ircuit runing and the neon still comes on and the capacitor charge indicater led dose blink when the cap charges . this one here is acting differently but ok ,

hello audio guru i must of got it wrong the diodes are uf4007 high speed diodes and the capacitor charge circuit works different when intergrated into this one ,than it did with the other high voltage photoflash capacitor charger, but ive modified it by adding a switch so i can monitor the cap charge at intervals dureing the chargeing process as this one cuts the neon out so ill use it for short tests for cap charge so the neon stays on whgen charged

the switch wires are finished and all i have to do is get the terminal things for the battery and wire that up , so i used 2 jumper wires with insulated crockadile clips on the ends and ran them from the 12 volts lead acid cell high energy battery and , there was no action so a bit of testing and continiuity checking the thing is going so i put a 330 volts 120uf high voltage photo flash capacitor, up to the outputs and adjusted the 10k and 25k pot. as for the capacitor charge indicater that worked so well when in line with the 350 volts photo flash capacitor whith the unit before this latest one it dident work the same and this one you can hear the high pitch sound of the flyback and the sound seemed to be beeping and the led would flash to indicate a charge but the neon was canceled out so i disconected the wire of the charge indicater and the neon came on so i made a few modifications by installing a switch to switch on the capacitor charge indicater circuit iether when the capacitor is chargeing or when the unit is off and the charged capacitor is still hooked up so i can use it that way with or without the neon comeing on , now the flyback driver circuit or vortex canon circuit which is what the driver circuit really is has the uf4007 high spedd diodes in it and the 1k resisters are metal filom types with 2 per cent tolerence . and the electro in the circuit is 2200 uf but at 50 volts and not 35 volts so the test went ok with these results in chargeing the 330 volts high voltage photo flash capacitor at the value mentioned earlyer , the capacitor charged up fully or more and the feelable voltage across the capacitor terminals was much more stronger or powerfuller so this thing seems to really put a big charge that packs a high current punch when i touch the capacitor terminals with my fingers so now i just have to finish the panel and lid and its ready for some hydrolysis exsperimenting and others

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