Capacitor ? - Electronic Circuits Projects Diagrams Free

1Steveo · 19th March 2007, 05:28 PM

Is there any reason I should not use a Photo Flash Capacitor to replace a Electrolytic. Its part of the TV power supply ?

**Nigel Goodwin** · 19th March 2007, 05:33 PM

It doesn't sound a very good idea! - but you don't give many details for us to base a judgement on. Exactly which capacitor in what sort of power supply is it?.

1Steveo · 19th March 2007, 07:13 PM

Sorry I looked at the cap, and thought it was deformed! But its ok! The cap is part of the switch-mode power supply. The cap is 270uF 200 volts , but going through my junk The only thing I had close was a photo flash cap rated at 300 volts. I was just thinking that the Photo Flash might of worked
.

Keruskerfuerst · 19th March 2007, 07:43 PM

You should use a switch mode capacitor.
Lower |Z| at high frequency.

Sceadwian · 20th March 2007, 02:30 AM

Photoflash caps are electrolytics. But they're not usually rated for continuous duty. I'm not sure if you can compare the capacitance and voltage rating on the package as being equivalent to a general purpose electrolytic. Probably not a good thing to try.

Hero999 · 21st March 2007, 06:12 PM

I wouldn't think there would be a problem, providing the capacitor has a low enough ESR it'll be fine.

Sceadwian · 22nd March 2007, 04:49 AM

I know the exact model number of photo flash I have and they don't even list a ESR There's a reason for that, they're produced in bulk and cheaply with wide variances to reduce cost, so the individual device to be used would have to be tested in order to determine if it were okay for use under anything but short pulses infrequently. Even a badly manufactored capacitor is going to last a pretty long time when used at the rate that a disposable camera flash is. I've never taken any apart (they're expensive obviously) so I don't know what kind of capacitors higher end cameras use.

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19th March 2007, 05:28 PM	#1
1Steveo	Capacitor ? Is there any reason I should not use a Photo Flash Capacitor to replace a Electrolytic. Its part of the TV power supply ?

19th March 2007, 05:33 PM	#2
Nigel Goodwin	It doesn't sound a very good idea! - but you don't give many details for us to base a judgement on. Exactly which capacitor in what sort of power supply is it?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

19th March 2007, 07:13 PM	#3
1Steveo	Sorry I looked at the cap, and thought it was deformed! But its ok! The cap is part of the switch-mode power supply. The cap is 270uF 200 volts , but going through my junk The only thing I had close was a photo flash cap rated at 300 volts. I was just thinking that the Photo Flash might of worked .

19th March 2007, 07:43 PM	#4
Keruskerfuerst	You should use a switch mode capacitor. Lower \|Z\| at high frequency.

20th March 2007, 02:30 AM	#5
Sceadwian	Photoflash caps are electrolytics. But they're not usually rated for continuous duty. I'm not sure if you can compare the capacitance and voltage rating on the package as being equivalent to a general purpose electrolytic. Probably not a good thing to try. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

21st March 2007, 06:12 PM	#6
Hero999	I wouldn't think there would be a problem, providing the capacitor has a low enough ESR it'll be fine. __________________ I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong. Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.

22nd March 2007, 04:49 AM	#7
Sceadwian	I know the exact model number of photo flash I have and they don't even list a ESR There's a reason for that, they're produced in bulk and cheaply with wide variances to reduce cost, so the individual device to be used would have to be tested in order to determine if it were okay for use under anything but short pulses infrequently. Even a badly manufactored capacitor is going to last a pretty long time when used at the rate that a disposable camera flash is. I've never taken any apart (they're expensive obviously) so I don't know what kind of capacitors higher end cameras use. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."