Muller Dynamo

[neptune]

@ Hartiberlin. Anything is worth a try but perhaps you would have problems . As the number of magnets is different to the number of coils , the coils would be out of phase with each other .Some would be "pushing" while some were "pulling" if you understand what i mean . That is my opinion .

[k4zep]

This might be helpfull for those who cannot find the specified DC/DC supply.

Rhino 3000mA DC/DC Car Adapter:  http://www.walmart.com/ip/Rhino-3000mA-DC-DC-Car-Adapter/16318456?findingMethod=rr

Hi Lasersaber,

They also have a 2500 mA (2.5 amp) available for half the price of the 3 amp one!

http://www.walmart.com/ip/Rhino-2500mA-DC-DC-Car-Adapter/16318457?findingMethod=rr

Boy I wish I could build this economically!   Already have over $200 parts on order for my build.  Whew....


Ben K4ZEP

[hartiberlin]

@ Hartiberlin. Anything is worth a try but perhaps you would have problems . As the number of magnets is different to the number of coils , the coils would be out of phase with each other .Some would be "pushing" while some were "pulling" if you understand what i mean . That is my opinion .

Okay, you are right,
this could lead to avoidable problems so some coils might break then the rotation.
So it is best first to try the original setup, you are right !

Sorry.
Regards, Stefan.

[yssuraxu_697]

I found this supplier:
http://www.alibaba.com/product-gs/443365023/power_amorphous_cores.html

"Material:Ni-Zn DN85H DN100H"

Look the specs:
http://www.chinadmegc.com/chinadmegc/chinese/images/bigarea/niexin.pdf

Seems just rather crappy NiZn ferrite

Since most ppl seem to be from Europe, and here is hardest to get proper stuff. Maybe try group buy if someone finds right stuff.... ? Of course it would be very messy unless someone organizes it properly...

For example these guys have high-end stuff:
http://www.gammamet.ru/en/ster_sl.htm
But would be pointless to try to order 10 cores

[Cherryman]

This one is in the Netherlands and accepts paypal

FERRIETSTAVEN
=============

FAT35    35 x  6.4 mm  Ferrietstaaf                                         0.41
FAT59    59 x  10  mm  Ferrietstaaf, bewikkeld 250 µH
                       //120pF>1MHz  //2n7>130kHz grotere spoelen voorr.    1.14
FAT120  120 x   8  mm  Ferrite (Fairite mix 43)                             3.90
FAT175  175 x  10  mm  Ferrietstaaf                                         5.40
FAT180  180 x  15  mm  Ferrietstaaf                                         6.78
FAT200  200 x  10  mm  Ferrietstaaf                                         4.90

Nog langere staven zijn extreem duur, het verdient daarom aanbeveling ze
samen te stellen uit onze voorraadtypen; dit gaat eenvoudig door verlijmen,
eventueel in combinatie met een kunststof of kartonnen kokertje over de
verbinding.

18x3           Ferrietstaafje                                              0.23

Prices in Euro


Source: http://www.xs4all.nl/~barendh/Indexned.htm