This coil launcher is based on a disposable video camera flash system. It uses the charging system from one video camera plus the the flash capacitors from four cameras. The coil is 200 turns in 10 layers wrapped around a glass tube with a 3mm inside diameter. The projectile is a 2.5mm diameter nail. It certainly isn’t as high powered as some of the systems we’ve featured, but firing at 20-25m/s it can still be dangerous.
[thanks phuzzy3d]
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