Muller Dynamo

[hartiberlin]

Great build also from Clanzer.
Looking forward to see your first test results.

Many thanks in advance.

Also to the other builders. Great work so far.
Keep up the faith and let us know your progress !

Many thanks to all the guys who are involved.

Have to do my tax papers the next few days, so I
can not be so frequently here, but I wish you good luck !

Regards, Stefan.

[e2matrix]

I agree fully with the COP point.

About the uC point, I do not.

Even if your control signals are external, (ie external triggering) that is irrelevant to theory.

For fine tuning your timing and creating a device, you should use prototyping tools.  Use a PC as a function generator, ect.

That way you can adjust your timing on the fly, and use complicated algorithms.  Once you find the trigger points, you may no longer need them.   You can revert to properly placed optical or hall sensors and logic circuits.

BUT, with 3.3v tens of uA microcontrollers that can run months off of a coin cell, the use is trivial.

As for prototyping, they should be used.

Microcontrollers are cheap.  There is no need for the projects I have seen to have to use more than a 10f20x PIC. 4MHz is fine for all of this work. 10bit ADC and a built-in capacitive touch option which can be used in place or with a HALL effect sensor.

I know it is out of grasp of many builders, but there is no reason people should not work together.  If you can wire up a 555 circuit, then you can wire up a PIC that a friend sends you.

I am willing to offer code help.

Im sure if you were to use a "send me a new chip, and I will send you a programed chip" type program, designs could happen much faster.

Also, for all of the folks who do not have o'scopes there are PC based soundcard scopes that will work fine at these speeds.

They are free.

You can get a USB based sound card from Deal Extreme for $2.20, so you need not worry about overloading your soundcard.

EVERYONE building should have a dozen of them on-hand.

http://www.dealextreme.com/p/virtual-5-1-surround-usb-2-0-external-sound-card-22472

I'll add that dealextreme is a pretty cool place with great deals and all shipping is always free but expect to wait 3 to 4 weeks and sometimes a bit longer to get something in the U.S. from them.  Also they have a DC-DC converter similar to the one mentioned by Romerouk.  It's only $6.10 but it's 2000 ma instead of 3000 ma so it may be marginal but if you're on a budget it might get you looped for a little while.

[plengo]

As Moderator on the JT topic as well as a few others, I found the best thing to preserve posting numbers is to use the "Modify" option and remove the offending post and in its place type something like "***Post Removed by the Moderator***".

This should solve the problem.

Bill

I agree Bill but i don't that have option available. So i have to do the only thing i can: delete.

Fausto

[lanenal]

You correct, two opposite magnets, distance between ca 35mm, what kind of saturation, what will be saturated? This tiny 6mm x 15mm ferrite rod? Why the hell it must to be come saturated? Flux concentrates out of coil, out from 35mm gap between two magnets and so what, who is waiting there - none
Someone can just walk around his room, one magnet in left hand another in right and make serial pushings between until Monday morning when needs to go to school
cheers,
khabe

khabe, surely there is a point in your post. The opposing magnets case is harder to tell. Imagine you have two very strong men fighting in a small room (there is little room left there), and have a third person to intervene. That's a hard case anyway.

[hoptoad]

snip....

I will say right now, there are more things going on between the magnet and the coils than is easily measurable, as the "Sound" and the "Feel" changes more than the signals, and power drain isn't affected as much as I expected from the loading of the external coils???

snip...

My bold highlight added to above.

Welcome to the world of wonderfully unexpected results from open magnetic systems.
Non linear or unexpected results are common and really frustate Design EE's

Cheers