Self accelerating reed switch magnet spinner.

[TinselKoala]

TK:

If I could make just one clip request it would be this:  Trigger on the pickup coil waveform and display the comparator output on the other channel and play with the 10-turn pot.  That will show the "voltage threshold slicing" in a very dramatic fashion and might blow some minds.

MileHigh

OK, It's coming up in the next video which is processing right now. Go have a beverage, walk the dog, it will probably be ready by then. I'm not sure if it shows what you think it will but it certainly shows how varying the pot setting changes the points on the slope of the sense signal where the mosfet turns on and off.

You know, at this point I still don't know if the thing is working in attraction or repulsion mode! I guess I had better check.

ETA: Attraction mode. I'll have to try repulsion mode too.

http://youtu.be/oDQi4nV-WnE

[MileHigh]

TK:

Thanks for that.... Can you play Free Bird now?  lol

It looks like your tuning has improved yet again, the rotor seemed to be really moving.  The strobe effect also looked great.  There is some peach fuzzyish noise but that could be eliminated.

You can see how you have complete control over the main coil pulse firing a.k.a. pulse triggering.  It's much better than just playing with the value of a base resistor.  Also, the pick-up coil is a "pure EMF" device now and has no load on it at all.  It does not have to push current through the base of a NPN transistor anymore, the op-amp would take care of that if you had a transistor-based design.

When you look at the short-lived "Bedini 10-coiler" I think it was made by creating one humungous 20-watt base input resistor that drove all 10 transistors.  There was a huge load on the pickup coil.  That's about as low tech as you can get and if the transistors didn't match then you would have had problems.

You now have the technology, faster, stronger, the world's first op-ampatronic pulse motor.

MileHigh

[MileHigh]

Just as a frame of reference for Old School, this is a US Navy clip about the positioning systems for the big guns on battleships:

http://www.youtube.com/watch?v=_8aH-M3PzM0

It's a film that has been cut into 6-minute slices so you can watch the rest if you are interested.  What's amazing is that the the big guns were controlled by a team of men putting data into a huge mechanical analog computer.  All of the computing was done in real time using gears and special cams that had mathematical functions built into the physical shape of the cams.   Besically a giant analog mechanical computer to land shells on targets and blow them to smithereens.

MileHigh

[Pirate88179]

Just as a frame of reference for Old School, this is a US Navy clip about the positioning systems for the big guns on battleships:

http://www.youtube.com/watch?v=_8aH-M3PzM0

It's a film that has been cut into 6-minute slices so you can watch the rest if you are interested.  What's amazing is that the the big guns were controlled by a team of men putting data into a huge mechanical analog computer.  All of the computing was done in real time using gears and special cams that had mathematical functions built into the physical shape of the cams.   Besically a giant analog mechanical computer to land shells on targets and blow them to smithereens.

MileHigh

MH:

Didn't click the link yet but this sounds a lot like the Babbage engine? 

TK's device using your idea is, of course, brilliant but, I have a concern that when the Nobel Prize folks see a peanut butter lid used in the device, it might scare them.  We need to come up with a better rotor that is more sophisticated...maybe something like silicon or glass or gold?  At the very least it should be painted flat black.  Then, no one would know what the material actually is.

Great suggestion on this one MH.

Bill

[TinselKoala]

Unfortunately all my good tooling is still up in Canada. I hope somebody is getting some use out of it.  So I am restricted to what I can gnaw out of raw materials with my front teeth.

The rotor and frame are from the project where I helped a newbie to get his Bedini SGM running. It was an excuse for me to build one, so I did. The rotor is a peanut butter jar lid, but you could also use a mayonnaise jar lid, if you don't like peanut butter.

The axle is a long brass screw, 1/4-20, head cut off, ends pointed by chucking the screw in a drill and turning the screw against the running bench grinder wheel until a nice point is made on the exact axis of the screw.

A couple of wooden washers (scrap from the hole saw) spread the force and allow for some radial adjustment before clamping down on the lid. The magnets are inside the lid, of course: never rely on just adhesives to hold your magnets in a moving assembly, always use structure to do it. I sanded or cut away the inner threads on the plastic lid so the magnets would sit flat, then they are glued in place with 3M-Permatex yellow weatherstrip adhesive, the best glue for this kind of thing. Sticks to everything, remains slightly flexible when cured, and is removable if you really need to remove it. The black is not so good, always use the yellow. Takes 10 or 15 minutes to get a good bond, follow directions, it's a "rubber cement" kind of thing.

The points of the axle go into hardened setscrews for the pivot bearings. Good setscrews have a little conical indentation on the end that is perfect for bearings. End play adjustment is critical with pivot bearings so build in an easy way to do it, and have a stable build. The axle will also grow in length as the temperature warms up and this will reduce end play and may cause binding.

Shades of Steorn's Hot Lights Bearings! They actually told the truth about those jeweled bearings being damaged by decreased end play caused by heating of frame and axle parts.