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Disposable camera circuits.

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LAN_403

radiotech

Sun Sept 05 2010, 03:50AM

Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546

Putting the yellow boards in // doesn't increase the current they supply, and a cap charges just as fast with only one. However //ing the blue circuits, they work as expected --charging caps faster...

Blue has a lower wavelength than yellow does hence higher energy level.

Adam Munich

Sun Sept 05 2010, 04:07AM

Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242

I don't think that's the reason. :p

quicksilver

Sun Sept 05 2010, 05:32PM

Registered Member #1408 Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679

Not only is it a nice writeup and pic; but it's unique. Everyone looks for that unique area of a hobby or attraction that separates their page from others.....If that disposable camera concept were taken deeper through areas of HV, utility in other electronic areas, & (whatever) the camera's operation itself - it could make that page stand out in a rather smooth way. - no one else is doing it.

Adam Munich

Sun Sept 05 2010, 09:52PM

Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242

I'll look into it deeper, make schematics etc, but school's starting soon so it may take a little while.

I'm still trying to figure out the yellow board problem. Tomorrow I'll put diodes on the HV outputs, then // them. Maybe that'll do something. As for the nice pics, gotta love my sony dslr.

Also, disposable cameras are a dying product. Most companies are getting out of the film business. I don't think kodak will be making these anymore in 2 years.

pauleddy

Sun Sept 05 2010, 10:34PM

Registered Member #2909 Joined: Wed Jun 09 2010, 12:31AM
Location: fort belvoir, Va USA ( south of DC)
Posts: 145

ya I have actually built one of these to power a photo cap bank for science fair so I have allot of these little chargers.
I found out something strange on day when I replace the transistor of one of the charging circuit with a transistor from a small 12v neon light inverter (I think d1616) and it oddly put out more voltage I was able to power a small x-ray tube (its about the size of a Christmas light) I donâ€™t know why this work but it did.

Xplorer

Mon Sept 06 2010, 08:31PM

Registered Member #2416 Joined: Sun Oct 04 2009, 04:23AM
Location: Oceanside, CA
Posts: 91

Has anyone metered the waveforms and frequency of these little circuits? I'm wondering if they can be used to power EL wire, but I don't think the frequency is high enough.

-Tony

Adam Munich

Mon Sept 06 2010, 09:27PM

Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242

Judging by the squeal they make, I'd say it's at least 10kHz.

Adam Munich

Tue Sept 14 2010, 04:38AM

Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242

So, I just got done playing around with the yellow ones again. Putting a diode on the output before //ing them did not help. I'm stumped! Removing the neon lamp doesn't help either, though it does raise the voltage to 350. It looks like the neon is a corona voltage regulator, which explains why the output voltage doesn't change with the input. Removing it seems to allow the voltage output voltage raise.

I reverse engineered it and here's a schematic. It's very simple, and apparently relies on inductive kick to oscillate. I have no idea where to find the data on the transistors, but they're either both NPN or both PNP. I drew the schematic using NPN transistors. Diode is unknown too. Looks like kodak had all the parts specially made.

64bOx

quicksilver

Tue Sept 14 2010, 02:26PM

Registered Member #1408 Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679

The whole page concept is quite nice. It's productive and clean. But more important....it's original.

You know that it terms of component identification, these things are all China contracted, HK mfg parts. The real likelihood of getting the quality info via datasheets you're used to is not great. You'd be lucky to identify a part similar enough to get close.

They most likely give them specs to follow and the companies have unknowns that come close enough to get the job done.

Killa-X

Tue Sept 14 2010, 02:59PM

Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039

I saw long ago on insteuctables how to mod one with 2 cuts and one wire added. I like to take all the parts off and solder the leads on one another. Charges a lot faster than the normal circuit. I also put many in parallel :)

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