SpudFiles

The difference is in the numbers, 300v is weaker then 400v and it is a switching component not a amplifier.

Welcome to Spudfiles.

That 300v is weaker than 400v is kinda basic, and that was not what I asked. Please read the question.
And no a capacitor is not a amplifier, thats not what i asked either. I was referring to the transistor on the disposable camera circuit. Im sorry if my previous post was unclear

Regards

kamelhmmvafan wrote:Hi, what difference would it make if I used a 300v .22uF capacitor instead of a 400v one?
What is the purpose of the transistor on the camera circuit? Is it a amplifier?

Thanks in advance

jrrdw wrote:The difference is in the numbers, 300v is weaker then 400v and it is a switching component not a amplifier.

kamelhmmvafan wrote:That 300v is weaker than 400v is kinda basic, and that was not what I asked. Please read the question.
And no a capacitor is not a amplifier, thats not what i asked either. I was referring to the transistor on the disposable camera circuit. Im sorry if my previous post was unclear

Well my answers still apply just simply put. If your wondering will the 300v will hold up on the same circuit it should, give it a try they don't cost much. The transistor is a switching component, it turns a part of the circuit on and off. In this case I think it fires the strobe/flash.

Btw about the "Hotwired" Project, can someone make me a circuit that will work in the same way like the circuit from the disposable camera but with more high voltage in output...
For ex. input 4v battery and output ( 500~1k volt ). Anyone have an idea how to build one "mini" circuit like that, and cheap ofc

The transistor on my disposable camera is marked D1960 or DI960 under that its a C thats over lined like c but above instead of underneath.
I cant find this transistor datasheet anywhere. Suggestions, tips?
My camera circuit is from a focus . I heart my camera

It would be a 2SD1960.

Search under Google images!

http://www.talkingelectronics.com/proje ... asher.html

Thank you dewey-1

Transformers don't work on DC. The transistor is to chop the DC to make AC for the transformer so the voltage can go higher.

Technician1002 wrote:Transformers don't work on DC. The transistor is to chop the DC to make AC for the transformer so the voltage can go higher.

Doesn't "chop" mean the same thing as "switch" in this context?

Basically yes.
The transistor is being switched on/off because it is being used as an oscillator to supply a pseudo "AC" signal to the transformer primary.

I just took my disposable camera circuit apart since the parts were so spread out on the board.
I salvaged the transformer, transistor and diode.
When I put them together I only got about 260v out, so i started to look at the old board and noticed that there were a 220 ohm resistor going from the transformers secondary(?) to +1.5v. So i tried to add a 220 ohm resistor and it went up to 330v instead.

Is that what Im suppose to get out? I know that the capacitor for the flash was a 300v one so seems like its suppose to be 300-ish.

If i charge the original capacitor with the circuit it takes about 20sec to reach 200v, and about 60sec to reach 300, is that normal?

Im kinda new to all this so please have patience with me

Yes, your par for course with the out put but maybe a little slow on the charging. Are you using a fresh battery? Good ground?

Update!
I just soldered the components to a real PCB and guess what, now I get 460v out, and I change the capacitor to 300v in less than 5sec and 350 in 10sec, so there were probably some bad connections on the breadboard.

All seems well, now I just have to sit back and wait for the mailman to deliver my spark gap and high voltage coil.

Thank you all for information and

Since im not native to English it can be hard to find parts sometimes.
Dont know If its ok to keep in i this thread or maybe it should be moved to some other category. I leave that to the moderators to decide.

I would like to know other names for 2 components:
Gas Discharge Tube, Spark Gap
SIDAC

What would the correct search term be for perboard with single squares instead of dots or lines that seems to be standard?

The 2SD1960 transistor, I cant seem to find an equal replacement, can somebody help me out?

What transistor is it on the Kodak board?

I would also like suggestions for where to buy parts (that has international shipping (im located in sweden) I mostly buy from eBay but it can be a hassle to find parts now and again.
Regards

Note: updated 3 times

You should be able to get all your electronics here and Useful Links & Information is a great page to bookmark.