Muller Dynamo

[scratchrobot]

Congratulations Romeruk with this achievement and thank u for sharing all the info.

I'm really impressed and have to replicate this one for sure
Ordered some parts already and will keep you updated.

I wish you and your wife all the best in future and hope you can fulfill your dreams.

Regards,
scratchrobot

[Rosphere]

romerouk,

Nice work.  Thank you for sharing.

Stop risking a floor crash, keep it on a table!  Some will simply say that you could have thin wire routed along with your cotton string, (just out of focus of your camera,) powering your device externally.  What have we gained?

I agree with you: get more successful-replications running.

I agree with EMdevices: document the details and try to discover the fundamentals.

We would appreciate some more graphic details, maybe arrows and lines on top of actual photo images, showing these timing adjustment ranges that you wrote of earlier.  Please include some 'if-then' situations from your experience.

Stop and review some of your replies here and elaborate upon those those not yet covered in your original document.  The more detail that you provide in one document, the better chance you have of achieving your goal of sharing the stage.

Thanks again, man!

[bourne]

Better material for the core will improve substantially.
People should pay attention for the core material, that is one of the most important keys in this setup togheter with the spacing arangement.

After reading what EMdevices posted about the h curves, and what Bill Muller said about the 'amorphous polycrystalline ferrite' used in his cores (from Muller.doc posted by skywatcher123 reply102) I also think this is very important.

@romerouk Am I correct in thinking you acquired the cores from inductors/chokes salvaged from a computer power supply? Can you remember the component? I would like to start to identify the ferrite used by you so we can compare it to other materials of known values of operation. With lots of replications about to come together we could possibly all try different materials and compare the results, to find a better replacement, if you think this part could be improved upon.

I have started to cut some 10mm dia. ferrite rods I have (typical AM radio ferrites the ones with flats on either side to prevent rolling off your desk). I would like everyone's opinion as to whether these will be suitable?

Kindest regards

bourne

[neptune]

@Romerouk .Some of us are having problems finding suitable ferrite cores. The use of pieces cut from ferrite rods from old radios has been suggested . These are usually 10mm diameter .What is your opinion on using these . Also there will be millions of old CRT televisions dumped as the analogue transmitters are switched off . Would the multistrand wire from these degaussing coils be suitable ?

[hoptoad]

Well I have started, does that count? lol

Rgds Ron

It sure does Ron!
I'm looking forward to seeing your build. I've seen previous results of your mechanical skills
so I know you'll do good.

Looking forward to (hopefully) some more positive results and the ensuing lively discussion.

Heres something Romero said back on page 5.

"The distance between the coils and the rotor must be adjusted depending on the magnets used, core... Too close is not neccesary good."

Sound familiar to you Ron ?. Someone I know has mentioned this in detail before, on another site?.
It may have even been me !! LOL.

P.S. - Thinking aloud ... Open Magnetic Sytems. They're full of surprises!  LOL

Cheers all .... KneeDeep