The MOSFET can handle 110A continuously and 390A as pulse current so that isn't going to be a problem. The gun isn’t exactly creating plasma discharges with its launches, but it’s a fascinating project nonetheless. You know those permanent magnet guns? 26 Comments . I got two 3 cell ones and connected them in series. Whenever we see a coil gun project on the Internet, it seems to involve a bank of huge capacitors. Plus, you get much higher efficiency out of a linear motor than you do out of a pulsed coil. Solder everything together, wrap the connections in electrical tape, and test it. Materials used in making coil gun: 1) Coated magnet wire 2) PVC pipe 3) 400V full bridge rectifier 4) 100 W incandescent bulb 5) Multimeter 6) Capacitors 400 V, 3300uF. I liked his video editing, as for the rest of it…. pinMode(7,OUTPUT); I Just want to go over couple of this I haven't mentioned yet. And full info that how to place that part correctly . I mean shooting stuff. I used a photoflash charger to charge a bank of capacitors rated for 350v, 880 uF. I need to make a circuit which can increase input voltage of about 12V to 300-400V. It's just an infrared LED and an infrared photo transistor. I have tried to include some subsidiary information regarding the basic theory behind a simple single-stage coil gun and how to go about constructing one in your home electronics lab. IRF3205 to be exact. 2 years ago How to make a coil gun. Pry a new or used disposable camera apart with a screwdriver. They can fire a magnet with a fair bit of a ping. You've probably heard of these before, and their devastating effects on electronics. It is explained in the video quite well at 4:20 :D. To toggle the coils we'll using MOSFETs. Question B.B liked ESP32 Tiny Basic with VGA output and PS2 keyboard. Voltage. Once you finish all 6 layers you can drill another hole for the wire and tie this and around the pole to keep it in place. Another thing to look out for is the heat sink on the MOSFETs. The Arduino Nano is powered separately by a USB cable using either power bank or wall adapter. Must contain a lot of iron so it is ferromagnetic. Whilst it's kind of useless it's a lot of fun to play with. Again first coil being 7 and second being 8. Many coil gun and rail gun builds have made it to our pages over the years, including his ridiculously powerful gun that uses a capacitor bank so large it needs its own car. Be sure to check out the video I made. How to: First you need the capacitor charging circuit ⦠After that, take the insulation tape and wrap around the pipe from a distance of 1-2 inches from its end. Using capacitors may not be the best idea if you are looking to make an efficient gun. 8mm or 7mm steel rod. The Coil Gun: Concept. On a small ⦠Yeah, I was baffled as to why he would have used such a high Vgs…or how he would have even found such a part. What is the initial triggering device? The current decay depends on the voltage across the inductor, since U = L * dI/dt. A linear motor in contrast has a copper or aluminium slug as a projectile, and it works by inducing an eddy current into it, which in theory has no limit except proximity and skin effects that apply at high currents and switching speeds. Since we need 20V to trigger our MOSFET we'll use comparator to take 5V signal from Arduino and turn it to 20V. If you don't have 3D printer then you'll have to figure this out on your own :D. To detect projectile being exactly in the center of a coil we are going to use infrared sensor. Learn how your comment data is processed. My coil is 70 feet of 26 AWG wire wound on a plastic drinking straw. The capacitor used was chosen for improved efficiency over the ceramic capacitors used in the original Plasma Gun. I have no clue what will happen to the 6x6mm Nd-magnets, will they keep up while accelerated. Price Try designing a system with multiple coils, capacitor banks, and a switching device. Lv 4. It's the same thing when you're building a coilgun :D. I'll be going into details of the electronics here but I'll not be making any fancy case. I'd suggest using Li-po batteries. When firing, the coil of wire induces an intense magnetic field that draws the ⦠Great suggestions. In this example, I have used electrical tape to create ends that prevent the coil from moving and/or unwinding. 2 years ago pinMode(8,OUTPUT); Whenever we see a coil gun project on the Internet, it seems to involve a bank of huge capacitors. A small capacitor, of similar size as the used LiPo batteries should outperform the batteries in delivered peak energy. Hi Mehdi, Iâm a high school student competing in a science fair, and you inspired me to build a coil gun for my project. I starts and sets up which pin is output and input. Thanks for the feedback. I like the adjustable delay for switching the MOSFET but it’s going to be pain in the butt with 6 coils. 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It can supply this current because its own series resistance is much lower than that of the battery stack. Also an OPAMP as Comparitor as a gate driver is a kinda bad idea, you want a dedicated driver for power applications like this fot fast switching times. From now on you'll also need to try keeping the winding as close together as possible as they will act like a spring. However, as with most things, when it comes to making a coil gun that performs well, that is, converts a significant portion of the energy stored in the capacitors into kinetic energy, even the best designs -the ones on this web site included- achieve at best a meager couple of % efficiency. When you trigger the coil gun, the capacitator is discharged very quickly at a very high current. I'll have to lower that down. Once all the tabs are released, pull t⦠I'm using 6 cells and if you've seen the video it does some damage but it isn't anything spectacular. I am designing a coil gun using a schematic that specifies a capacitor bank of 10 1500uF capacitors in a 2x5 arrangement to provide an effective 600uF at 1000V. A coil gun in its basic form consists of a launch coil, a high-voltag⦠The capacitor loses its charge, the spark gap stops conducting and it all starts again with the camera circuit charging the capacitor. I use the flash circuit harvested from an old disposable camera as the basis for a handheld coil gun. But they don’t really get hot. An extra capacitor was added for increased performance. }. by: John Baichtal. This is a probelem even for the LiPO pack, so you need a different type of capacitor that can tolerate hundreds of volts and has a very low ESR, which means you have to use capacitors the size of soda cans to get any performance out of a coilgun. You don't need it but it's quite convenient. You can also find eagle files if you want to play with it. I will make a coil gun with only one coil, because it's extremely simple compere to device with few coils, you need to synchronize all coils, use some kind of sensors to detect position of the bullet, also multi-stage device simply would not fit in the form factor of the pistol, even now body is completely filled. how to make a coil gun without a disposable camera . I've often been asked how to make a coil gun. 7) IGBT of 50 A 8) Switches 9) 9 V batteries 10) High gauge wires. Also these quantities are for 2 coils so you might adjust depending on how many you'll be making. Question plastic tube. I've tried to make it fairly safe in that it won't fire the projectiles with too much power as long as you charge the capacitors to only around 100 volts. ⦠I have a working coil gun, but i fried the circuit that charges my cap that i took out of a disposable camera. A working model of a electromagnetic mass accelerator (mobile test bench) in HD quality. All that will happen about 20 times a second. The coil is 28mm long and has 6 layers. My projectile is a finishing ⦠When triggered, the Arduino Nano activates a pair of IRF3205 MOSFETS with logic signals stepped up to 20V, shooting lengths of 7mm or 8mm steel rod. The ones that are almost perpetual motion except nobody’s managed to “close the loop”? Mechanically and electrically it works but I'll be making 3D printed enclosure and sorting out every details of the gun so if you want to see that subscribe to my YouTube channel as it'll there the soonest. while(analogRead(A0) > 50 && timer < 1000){ digitalWrite(13,LOW); It does. Itâs powered by quadcopter LiPo batteries, 2x 1400 MaH drone batteries. This article documents the build of the simplified edition of my electromagnetic coil gun, capable of firing a small ferromagnetic projectile at a moderately high speed. Since this will be handling high current I recommend using perfboard or some PCB. Did you make this project? Vgs max is the max difference you can have between gate to source. I've been planning to build a real coil gun for about 2 years now. If you've the video then you know how it can just blown up. Relevance. Regular breadboard isn't going to hold up. Li-po battery - at least 6 cells recommended. 9 years ago. That will be my future video so subscribe if you want to see that. Note that PE is proportional to voltage-squared, so it is a great advantage to use higher voltages. After all we are making a coilgun. It would turn the electromagnet on and off really quickly, which makes those capacitors perfect for a coil gun. Thanks in advance! You don't even have to use 6 cell battery. I got them from hobbyking.com They have a ton of batteries. Answer Save. (Comment Policy). The high voltage coil then puts out a very high voltage spark on the other side. [miroslavus] took a different approach with his gun–he wanted his project to be built without those monster caps. Afterwards it fires the coils. This project like many others is using Arduino even if it might not be necessary. Nevertheless, this opinion is mistaken - modern technological the base has long been able to realize an electromagnetic mass accelerator with an acceptable efficiency and high reliability I am looking for interested in making. You can of course just connect step down converter to the battery and get 5V but I didn't bother. 3 years ago, I utviklingen av ideene til Christian Birkland elektromagnetisk masseakselerator https://youtu.be/admghPNkotI A working model of a electromagnetic mass accelerator https://youtu.be/9YQyjPITDho (mobile test bench)https://youtu.be/Sm1rZ-ZeHlc in HD quality https://youtu.be/M6CUHnvI2Ek You can buy what I didhttps://youtu.be/nCgz02bR058https://youtu.be/FFBHuCnkUzUIn the video, the functioning of the working model of the electromagnetic mass accelerator (mobile test stand). Think it’d help? Remove the paper layer from the disposable camera and locate the tabs on the bottom and sides of the casing. The PE (potential energy) depends greatly on voltage. digitalWrite(8,HIGH); I would suggest using one but make sure you use separate heat sink for each MOSFET otherwise you'll be switching all coils at once. You can power this coil gun with a power supply but they are usually very limited and you wouldn't be able to make it portable. The big difference would be a coil gun vs a rail gun, the rail gun using the voltage between two rails being shorted by the projectile creating a magnetic field out of the projectile while heating (and melting) projectile. Wouldn’t an array of permanent magnets (or electromagnets) above and below the rails work better? I wired everything just hanging in the air since it's only couple of resistors. on Step 7. In particular, it stores an electrical charge. I'd recommend hobbyking for batteries but for the rest it's irrelevant. To fire again you need to reset the Arduino. the system stops and if it successfully shot projectile it also stops. on Step 1. 2 years ago. This why I suggest putting pull down resistors on D7 and D8. I am wondering why this configuration is desirable rather than, for example, using all 10 capacitors in parallel. Many coil gun and rail gun builds have made it to our pages over the years, including his ridiculously powerful gun that uses a capacitor bank so large it needs its own car. I'd suggest checking the update schematic on https://www.instructables.com/id/Coilgun-1/. I guess the fets didn’t run long enough to heat up. The rigs have ridges to help you lay the coils down neatly, and they also have mounts for photodiodes, ensuring the gun knows when it’s loaded. It just make building it easier. In almost all coilgun configurations, the coils and the gun barrel are arranged on a common ⦠For now my coilgun is taped to a scrap piece of wood but hey, it works. Of course they never will, but… anyway…. 2 years ago. The bright side of doing this, if it fails as coil gun it still can be useful as linear drive…, Please be kind and respectful to help make the comments section excellent. Even the best coilguns have efficiencies in the single percentage points. I didn’t have any small heatsinks sitting around. http://hackaday.com/2015/11/09/the-most-powerful-diy-railgun/, Very cool magnetic gun. We can detect light coming from the LED with the photo transistor and whenever a projectile blocks the light we know it's position. Otherwise it's a nice design and I'll be patiently waiting for part 2 :). If you have the 3D model there is a hole where you guide the wire in and and twist it around the pole. Reason being that the ferromagnetic projectile saturates fairly easily, and that tops off the pulling force you can apply to it. digitalWrite(8,LOW); Far more than the battery pack or the electronics can supply. There are many details but more importantly TESTING at the end. Thank you! By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Very intreseted .. can't wait to see part 2! Steps for making coil gun: 1) How to prepare coils: Cut the PVC pipe at 6 cm length. Does anyone know where i can find schematics on how to build a cap charging circuit that charges up to about 300v using AA or 9v batteries? Whilst it's kind of useless it's a lot of fun to play with. how much current can it handle? For a faster decay, you should place a resistor or zener diode in series with the flyback diode, such that you nearly but not quite reach the MOSFETs maximum drain to source voltage. Check out the disposable camera coil gun project and the coil guns for newbies posts we previously ran. This site uses Akismet to reduce spam. In ⦠Step 1 â Preparing the coils (DIY make coil gun without camera) Making the coils for the coil gun. Would use 2400mAh, 130 peak C lipo, And an STM32⦠with many outputs, coupled to IR diodes and fiber optic cables to switch the FETs via IR diode – transistor. You'll need step up converter to create these 20V. But it still does involve high voltage and high power so it should be done ⦠How big is a 1400 mega-annus henry battery? That sounds really inefficent since you want peak field strength between the rails. How do you determine the value of the pull down resistor? A simple EMP consists of a capacitor, transformer, trigger, and coil of copper wire. Where would you best recommend getting the batteries. Worse still, the projectile gets permanently magnetized and you lose energy into re-arranging the domains.
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