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Other, then hold them together until the glue hardens. Peeled off the foil when the glue was hard.) Next, glue two of theseĥ-magnet stacks together side by side so the stacks are repelling each Stack down on aluminum foil, pressed them down to align the magnets, then Glue hardens, adjust the magnets so the sides of each small stack areįlat, and wipe off the excess epoxy. Here's how I did it.įirst I formed four larger magnets: I glued twenty magnets in four Glue them together to form two large magnets. The correct magnets, instead you can use twenty of the 1" magnets 64-1879. Supermagnets, of the same size as above, will work even better, Thousands of RPM (revolutions per minute.) Neo rare-earth Most other magnets are too weakĪnd will not work unless you spin the magnets incredibly fast, at They cost about $2 each, and have no holes through the center. Use the large 2-inch rectangular ceramic block magnets sold by Radio Shack Remove the the big coil, peel off the tape, and wind it on your Better source of wi re:įrom a mail order company, then use Vice-grip pliers to pry open the metalīracket. Then 250 turns will be the size of a grapefruit, and the outer turns willīe too far from the magnets. If the wire is too thick (or if it has thick insulation,) If the wire is way thinner than #30 gauge, the resistance is too highīe very dim. Mail order, or buy larger spools of wire. Even better, buy a few "open frame solenoids" from Be sure to wind the extra wire in the sameĭirection as before. Cover the joint with aīit of plastic tape, if you prefer. Then securely twistĮnd of the new spool to the end of the old one. Scrape the red plastic coating off all the wire ends. Wi re from Radio Shack, then use both spools of the Then your bulb would light up at lower magnet speed.
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If you could wind more turns on your coil, The #30 spool of thin red Radio Shack wire is 200 feet long, If your coil has more than 250 turns of #30 wire, then the magnet doesn't Little wheel on your nail, then rub the wheel on the spinning tire ofĪn upside-down bicycle (don't go too fast or the bulb will burn out.) Hand-crank drill (electric drills don't go very fast). (If they grind against the cardboard, it won't work.) Or perhapsīulb is being missed in a brightly lit room. Make your magnets really whiz likeĪ blur. USE FREAKIN' DIFFERENT PARTS! What, do you WANT it to fail? :) Notice: it's very important that you use the parts Before testing anything else, ask yourself if #30 enamel varnish-coated wire, then it won't work. Use the parts in the partslist, don't make changes. If you used a different bulb, it won't work. If you changed the magnets, it won't work.