Muller Dynamo

[hartiberlin]

You even do not need 16 or 24 volts, the only thing you need is the tommyrot talking,
And of course you can change one big supercap to number of smaller sizes  - rersult will be the same or even better
In reality your coil (pair of) unit gives out only few volts and you use DC-DC step up converter to get 12v,
Others will buy a lot of stuff, will spend the last family money for superalloy, for Metglas and for etc ... and everyone will wonder "why my replication does not work?" 
And of course you need to be very resentful when someone surmise about hidden batteries or about invisible wires ... you must to be good actor, bringed to tears and after that you need to to blab out to someone from forum, that "two men visited you and offered ... millions ... oh sorry, I have no rights anymore to continue with public discussion.
cheers,
khabe

NB !!!
I do not accuse anyone - I just abridge one of scenario how it could be done, the OU 

Khabe,
stop the discussion with the supercapacitor.
There was no one.
ALso in the first video he has only the coils output directly via the bridge rectifiers to the lamp
and it was also 24 Watts out and only about 11 Watts input
with NO capacitor !

[scratchrobot]

well, whatever call it litz, in UK is called Stranded Enamelled Copper -
Bunched copper conductors each strand individually enamelled
http://wires.co.uk/acatalog/st_wire.html
7 X 0.125MM SOLDERABLE STRAND EN.Cu
Ref: ST01250007-500

No more 7 X 0.125MM SOLDERABLE STRAND EN.Cu Ref: ST01250007-500 on http://wires.co.uk/acatalog/st_wire.html

Did they sold out already ? It was there a few days back when i checked 

[gyulasun]

Hi David70,

Would you mind taking a close-up picture of the opened converter, please?
Would like to see it, not because I do not believe you but to see how big heat sink is involved (I suppose it is a switch-mode converter).
(You can attach max file individual size of 500kB here, it is more than enough for a closeup, I think.)

Thanks,  Gyula

I just bought that DC converter from Maplin and opened. The circuit takes all space inside, leaves no room for a battery.If the circuit is removed will be removed with the voltage switch too as is soldered direct on the board. If there is a battery is not there.

[nul-points]

greetings pop-pickers!

(... a little bit of nostalgia there, for sad old Brits like myself    )


the main supply switch is NOT at the position shown in the schematic!
(page 1 this thread, as at 12:33 GMT 11 May '11)

when Romero switches off the device at the end of the "self-run test 1" vid (18:48), the DC converter is no longer connected to the joint output of the FWBRs - but it is STILL CONNECTED to the buffer cap

IF there was a battery in the cap then it would be STILL CONNECTED to the motor drive when Romero disconnects the FWBRs!

yet, instantly he disconnects the FWBRs (at 18:48) you can hear the rotor start to spin down

the FWBR o/p is across the only 2 connections on the buffer cap, so IF there was a battery inside the cap, then we'd then have to claim that Romero has also hidden an extra circuit into the cap which detects that the battery terminal voltage has dropped slightly (because no i/p now from FWBRs) and therefore disconnects the battery from those same 2 terminals

of course, at start-up, such a circuit would then need to be able to detect that the FWBRs have just been connected and connect the battery to those same 2 terminals again

so to avoid extra sensing complexity, our 'Cap-Spoofing' circuit would probably need to be continuously connected to the 'hidden' battery (or have a 2nd battery available) so that it could re-connect the main battery to the terminals again

got to admire this Romero guy's ingenuity & dedication to spoof...

we can see there's already plenty of work gone into building the Dynamo - but just look at what he's had to achieve to make a battery look like a cap, eh? 

the whole 'battery-in-cap' objection starts to look just a tad, shall we say, 'far-fetched'?!?


OK, so getting back to reality...

the DC Conv was switched to 12V at ~18:10 (DVM shows 12V)

Romero states that at 12V DC conv setting he reads ~15V at buffer cap

energy for 15V in 47000uF cap (at switch-off, 18:48) ~= 5.3 Joules = 5.3 Watt-seconds

at 12V i/p the motor draws 12W

so - at switch-off, with 5.3 Watt-seconds in the cap, and even IF the DC converter could convert it all (which it can't!) then the cap can only supply enough energy to drive the motor for less than HALF a second!

it's pretty clear, therefore, that the ONLY function of the buffer cap is to filter the FWBR o/p waveform and provide steady, smoothed DC

ie. when Romero disconnects the FWBRs - that baby is just going to spin down
(taking about 100 seconds - replicators please note - good bearings - low cogging - nice work Romero!)


this same argument applies to a SuperCap - IF there was a SuperCap hidden inside the 47000uF case, then it would have to get disconnected by the same sort of circuit i just described - otherwise the rotor would NOT spin down in 100 seconds


my conclusion?

Romero's self-run motor is ONLY getting rotated by the energy obtained from the 7 generator coil-pairs


let the replications continue!
np

...my drink's a Guinness, thanks - Slainthe! 


http://docsfreelunch.blogspot.com

[David70]

@Baroutologos
that was bad ideea....

I was reading all posts for yesterday and I am finding this one strange, bad ideea what?
I am looking before this post and I can see Baroutologos post talking nice there, nothing bad, the post is edited too, maybe there was something before and removed after.
Strange is that before Romero's last post he had some other posts, I think like 2 hours difference, and no sign of leaving, even showing picture with components for the next build.
I think something happend in between this 2 hours that made him change everything.

Gyula,
I need to find the cable to connect the phone to the pc, I have taken pictures already but no cable.