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Small coilgun, 70J.

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LAN_403

Harry

Wed Jan 11 2012, 06:46PM

Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139

Over the weekend I needed a project, so I thought, why not build a coilgun?
I have never seen one before in real life, so I am rather pleased with the results.
Rectified AC passes through a rectifier into a bank of small caps salvaged over time from various CRTs. A microwave oven door switch passes the current into the coil, a few turns wrapped round an old pen. A resistor voltage divider lights up an LED when it gets to ~250V. And there is the option of dumping the capacitors into a small lamp.

So where to now? What should I do next?
I haave the option of buying 10 1000uF capacitors for Â£30, or should I improve this design? SCR, better connections, better projectiles? I know I need to improve the safety of it.
Thanks, Harry.

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