DIY Coilgun very pretty, not so deadly

Want to scare someone with a pretty frightening looking gun? This DIY coilgun will get that job done. With the projectiles going out at only 100 fps this is far from a deadly weapon, but just look at it! The $130 pricetag is almost enough for the looks alone.

Full specs below.

Fully semi-automatic, up to 14 shots.
Capable of delivering over 18J kinetic energy, and speeds up to 110km/h! (42 gram projectiles).
It's a single stage gun, using a 8800uF capacitor bank with max 400v (704J).
Max shot efficiency is 2.8% but reaches almost 4% at lower voltages.

Charge time for 300v (12J kinetic energy 396J capacitor bank) is 8 seconds for the mains connection, and when using the internal batteries about 90 seconds. It also has a Digital voltage display.

Coil overheat after 14 shots at 300v.
Total weight: 5 kilogram.
Total spend: ~ 100 Euro
Construction time: ~40 Hrs

DIY Coilgun via engadget

Picture of DIY Coilgun very pretty, not so deadly
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jj.inc5 years ago
I personally think the light bulb is ugly, I would just use an led, but then again that would require complex wiring and stuff.
sampson1117 years ago
whats the light bulb for
according to the site, it is the charge capacitor
*Charge Resistor* PS just seen the comment's date. oh well, better late then never.
the light bulb is to indicate that the caps are fully charged
it goes off when they are charged
Probably when it shoots, it light up... I'm guessing it's mostly for the looks
the light bulb i would guess is for safely discharging the capacitors when your donr destroying household objects, and or dumping the back emf from the coil after firing.
mistahmaxi7 years ago
Have you atleast tried to shoot at a human being before telling people it's totally safe? A gun with the power of 18 Joules would atleast penetrate the skin, so don't mislead all those people that have been watching this.
if the bullet was smaller, it could probably penetrate easily.
I gave a coilgun with only 8 photoflash caps, and the bullet can go at 140 fps
fungus amungus (author)  mistahmaxi7 years ago
100 fps is still not very fast. Yes, it can put an eye out, but you can do that with a metal bb as well.
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