3v OU Flashlight

[magpwr]

Я хочу повторить то, что вы сделали, и не против, как это работает, но если вы думаете, что мы не должны быть в состоянии простого копирования, то я понимаю, но зачем создавать головоломки?
Пожалуйста отправлено феррита чашку Magpwr, он был одним из первых, кто хотел повторить из вашего видео.

спасибо

I wish to replicate what you did and don't mind how it works but if you think we should not be able to simple copy then i understand but why create puzzle?
Please sent ferrite cup to Magpwr, he was one of the first who wanted to replicate from your video.

Thanks

hi scratchrobot,

I might be the first person to be interested in the device but i am definitely a lousy presenter through youtube video.Hence i am not the right candidate maybe TinselKoala would do.

Do reveal to us if your replication is a success since you have the exact same Russian made ferrite pot core.

I have read this somewhere in internet it looks some of the old soviet made ferrite core are irradiated as part of the manufacturing process."Sorry i am unable to validate if this is true".

I am just thinking if this irradiation process do play a important "OU" role from the particular Russian Yoke to this recent ferrite pot core.

I have recently received the MC34063 but not the ferrite core from ebay yet.

[TinselKoala]

Your copper foils are wrong...


watch the video again, they're both connected on the secondary. (secondary being the lower uH coil)

the first cut he makes; the outside foil; leaves a short wire; 


This is the start of the unwind of the secondary.  The primary has two long leads on it that he start to unwind and finishes with; without connection tot he copper foil

Hmmm.... that won't be easy for me to fix on this bobbin, but I am going to make another one shortly anyway. Good that you told me this before I started! Thanks, or spasibo...   

What do you think about the inductance value discrepancy? milliHenries, microHenries, or something in between? Who said what? Do you know how many turns in each winding? I can't watch the video.

[TinselKoala]

Just for fun here's another scopeshot, at the same parameters as above.

The shot below is as described above, with a 1.7 mm thick wooden spacer between the two halves of the flyback core outer leg. Inner leg is probably still touching inside the bobbin. 3.0 V and 50 mA input.

[d3x0r]

Hmmm.... that won't be easy for me to fix on this bobbin, but I am going to make another one shortly anyway. Good that you told me this before I started! Thanks, or spasibo...   

What do you think about the inductance value discrepancy? milliHenries, microHenries, or something in between? Who said what? Do you know how many turns in each winding? I can't watch the video.

I dunno... the m could be a scribbled greek u ... wide lead and tail... so micro probably
it's definatly not enough to be milli; tesla coils are 30mH++... which thousands of turns...
and I doubt it means nano


you said yours were about 55 and 22...  but 1/10 of that inductance is only 1/3.1 the windings (cause there's a square in there)

[TinselKoala]

There is something wrong here somewhere.   

The sinus I am seeing seems to be at the local powerline frequency. I know it is coming from the coil and mosfet switching though, because I can feel and hear the coil vibrating.

I set up the measurements to read the p-p voltage and frequency of the sinus. The two shots below are first, with the core and spacer and spring clamp installed, and second, with the core unclamped and no spacer, chattering away, and retuned for a stable waveform set. Current draw went up to over 300 mA.

OK, I'm done with this coil I think, and I'll be winding another one shortly. Akula couldn't be picking up a harmonic of his powerline frequency, could he?