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I have just completed my latest version of a single stage halfbridge coil gun & wanted to show it off!
I have spent the last twelve months working on it (on & off)
Booster is based on a UC 3483 pwm controller IC. Capacitor bank is 19 x 140uF 300V flash capacitors connected in parallel.
Switching is done by a high & low side driver ic (IR2110) & drives two banks of 5 IGBT's.
Control is managed by a Picaxe 20X2 running at 32 Mhz. Puklse length, injector solenoid pulse & delay coil activation delay are all programmable via the front panel.
I'm using small bearings as ammo because they're cheap, uniform in size & readily available. Framwork was drawn up in my PCB program & sent to a laser cutting company. This is the first PC board I have had made professionally & I'm very pleased with the result!
With the coil in the picture I am getting 105 FPS. I know it is capable of more, but I have to find the time to wind another coil!
Once main caps are charged, I can fire a shot every two seconds.
Registered Member #3108
Joined: Thu Aug 12 2010, 05:37PM
Location: Worthing, England
Posts: 72
Seriously, that is the nicest looking coilgun I have seen so far! All of my coliguns and circuitry are ugly looking as they are simply slapped together just so I can shoot stuff
I have to agree with ghostnull, using nails or steel rods will work far better than steel bearings. But still if you want to play it around with your mates and don't want to do much damage and harm, it is good enough as it is.
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Single stage Halfbridge coilgun (version 6)
