Coil-gun prototype, ~15 J electric energy stored in a bank of 14x 1 mF electrolytic caps loaded to roughly 48 V; hand-wound 3-layer coil; drinking straw barrel. Enough to propel a tiny nail about 3 to 4 meters

Coil-gun prototype, ~15 J electric energy stored in a bank of 14x 1 mF electrolytic caps loaded to roughly 48 V; hand-wound 3-layer coil; drinking straw barrel. Enough to propel a tiny nail about 3 to 4 meters