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Vedran
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Posts posted by Vedran
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Making PCB is a bit problem for me, and making two sided even bigger problem , so I will have to satisfy with 3A version. If anyone has one PCB he don't need or can easily made one extra PM me please.
Thanks! -
With the 8.33A transformer, you can build the 5A option for this supply and change R11 to 39k to limit its output voltage to about 27V. -
I have 125W Hg light bulb, and I am going to broke its outer baloon so UV rays will be more intensive!
Can somebody tell me how long should I keep pcb under it, for how long!
Thanks a lot! -
I have old transformer with a secondary winding rated at 24 V / 1.2 A, or you can say 20VA.
Can I use this one with this project with no changes in parts values?
Thanks
I can also buy from my friend transformer 2x12 V that can handle 8,33A...
Maybe i should put this one. I think this one will heat less and buzz less than smaller one??
What do you think?
Thanks! -
I have old transformer with a secondary winding rated at 24 V / 1.2 A, or you can say 20VA.
Can I use this one with this project with no changes in parts values?
Thanks -
some links will be ok too.... :D
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Hello
I have almost unused car audio speakers, and i need amplifier (10W or 15W) for my electric guitar.
Can I use that speakers and how? Can somebody give me some schematics for simple Guitar Amp for home use.
Thanks -
Thanks audioguru!
Ante it is makes effects like distorsion on electric guitar!
Bye! -
Hello
What would be first broken when guitar processor fall from 2 meters height?? Maybe oscillator or what I am looking at it and can't figure out what is broken.... it is not visible...
Thanks -
Thanks Ante! ;D
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Hello!
I have one old Philips radio and cassete player and I like it very much and it sounds great, but it makes big BUM when I turn it on, and is very noisy when I am adjusting volume!
How to fix it??? ???
Thanks!!!! -
Hello!
So NTCR1 is thermisotr for 230V?? Here i attached english version of text that came with schematic, but here is only half of schematic but if somebody needs it, it is whole in Ukrains version!
Bye! ;D -
Hello!
If somebody is interested here is some text about how ATX PSU is functioning!
Bye ;D -
What is NTCR1 on schematic?? Post me a little picture plese so i can find it easily!
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;D ;D ;D
So can I short circuit it? Maybe it doesen't work now with capacitor on its place because it has infinite resistance and MOV doesn't have infinite resistance ??? -
:D
I don't get it? PSU sholud work fine without MOV?? Now there is capacitor instead MOV :-\ -
Yeah i think that was my mistake!!! I thinh that was burned not capacitor... but i don't know what type should i put????
Look at attached picture on one of my before posts i wrote sybmols I can read, ones I can't read are ?
So maybe that was the problem! Yeah it was thicker than regular capacitor.... It was green.... and it was on AC part of schematic....
Thanks! Bye! ;D
...:::Vedran:::... -
I forget to ask you: What is MOV?
Thanks -
Hey,
Ante and audioguru I think attached pdf will be very interesting to you as it was to me! I figure out some things reading it!
Enyoj! Bye! ;D
Keep posting and helping me :D
...:::Vedran:::...Using_an_ATX_computer_power_supply_to_make_a_scalable_mult.pdf
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Hey audioguru,
No i can't see such a jumper wire, but on my PSU there is big sign (only for 230V) so I that isn't the problem. It might be that fuse blowed with my fault, PSU stopped working so I opend it and accidentaly short circuit it when I was testing it. So that you don't be on wrong trace. There is no power on any pinout, it seems it is not getting to the end... Error is somewhere in the middle! ???
...:::Vedran:::... -
Hi Ante and audioguru ;D
Ok I will try that bulb experiment so we will se what happens. Where should i look for the switch for changing input voltage (230,115)?
On pin9 5V_SB there should be always 5V no matter is PS_ON activated (of course if AC is pluged) and i measure it but it is NULL.
I replaced fuse and as i can see rectifier bridge is working fine... i don't know how to test it more further....
Thanks :D
...:::Vedran:::... -
Hey Ante!
I soldered fuse and capacitor and tried to turn it on by short circuiting PS_ON and COM but it wont work!!!
How to turn it on???
Thanks!!
Bye!
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Hi hotwaterwizard,
I would also like to know that! Check website on wich you have link on picture with pinouts!
Vedran -
Hey Ante hello again,
Yes capacitor is broken! Its resistance is 36ohm and it should be much more. I can also see it has mechanical damages! I want to replace it but i can't see the capacity because it has small "like a hole" damages! When I find out what capacity it is and buy new 5A fuse i am going to try it on!
Thanks!
Vedran
0-30 Vdc Stabilized Power Supply
in Projects Q/A
Posted
Thanks audioguru,
I will try, and post here results when I am done!
Bye