Electromagnetic Ring Accelerator

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Published 2021-01-17
In this video i show how to use an electromagnet with an optical sensor to continuously accelerate ferromagnetic / magnetic spheres around a circular track.

A 12V LiPo battery supplies power to a driver board that energizes a 300-turn coil when a sphere approaches, causing it to accelerate into the center of the coil. I've successfully run the device with up to 3 spheres at a time.

The electromagnet is far more powerful against a magnetic sphere, but much more erratic and unpredictable, and the sphere tends to stop suddenly after a few rotations.

STL files:
www.thingiverse.com/thing:4918703

Music:
Kevin MacLeod - George Street Shuffle
Heatley Bros - Dimension Drift

All Comments (21)
  • @F1yb0y1986
    I appreciate that this is entirely done with circuitry and doesn’t require any micro controller or coding
  • @greggoog7559
    The only channel on the internet that's using a WWII microphone that still works!
  • @axontech
    All of your videos are outstanding - I have watched them multiple times. I really appreciate all of your high quality work not just on the videos but on your electronic theory based projects and explanations. I can't get over your using transistors to build a binary adder. I would have used TTL logic gates - but your expertise is way beyond what I know.
  • someone probably mentioned it, but, your mosfet may have been blowing because the gate was only being fed 6 volts at the moment of trigger, which isnt fully turning on the mosfet, that high drain-source resistance is no bueno when you are calling for ALL the amps you can muster. maybe use a buffer transistor and see if that helps enough to be able to use the capacitors again. That will help save your battery from being beat up too. Awesome videos dude, glad I found your channel.
  • @DAVOinIN
    This is quite fun. Contemplating building my own, but instead of just using a fixed delay between opto-sensor and coil-turn-on, use a variable delay that depends on the speed of the ball. This will allow higher efficiency energy transfer and could be pretty easily implemented by comparing each opto-sensor with the previous one.
  • @redsquirrelftw
    This is pretty cool, could have fun with that making an elaborate "train track" system of balls, could even have diverters so they randomly take different paths. Light sensors to track where balls are and more coils throughout to boost or even slow down balls so they don't collide with others. Could be a fun project to tweak all of it.
  • I watched the second version of this and got really inspired, will definitely make one if I ever get my 3D printer
  • Very good quality video. Was surprised to see you only have 70 subs. Seems like the kind of video you'd find on a channel with 100k+
  • @LeonMatthews
    Very inspiring project! Thanks very much for the cool video.
  • @DittoPerson
    Thank you so much, I'm going to use your circuit design for my own, it will use 4 coils instead and should reach speeds up to at least 32 feet per second!
  • @limboe6030
    Really cool and great how you solved all the problems
  • @MaltWhiskey
    This will be a great toy for my cats, they will love this. Thanks for sharing, this is going on my todo list :P
  • @MathIndy
    To help protect your FET from over-current you could put some resistance between the source and ground. This is called "source feedback" and it will work to turn the FET off when the current gets to be too high.
  • @youtuuba
    Very nice video, explains things pretty well. The only thing I would offer a criticism on is the video's title, since by the normal definition, this is not a "ring accelerator". That name is usually given to devices that continuously accelerate something in a ring/circular path, achieving very high speeds, whereas this device only gives a little kick to the ball in order to keep it moving. Yes, it briefly accelerates the ball, but then the ball coasts the rest of the way. It is really just a novel implementation of a DC motor. I own a commercially produced product of this same kind, having six electromagnets distributed around the circular track. I have not attempted to reverse engineer the circuit on each of the circuit boards (each electromagnet has its own identical printed circuit board), but I did note which components are on each board, and from that I assumed that a simple circuit, nearly identical to what you came up with. I think that the only real differences between the two circuits is that A) the one I have uses an IR LED and an IR phototransistor, and a driver transistor (probably a BJT) between the phototransistor and the MOSFET's gate.
  • @user-fd8lj7bt2w
    You did very well Although I don't know what this is for, your technology is ready to be levied😊