Hey guys,
new here and to electronics, was hoping for some feedback on my current project.
I have an old Antec 350w PSU sitting ehre and I want to turn it into a PSU that I can use for Electrolysis (rust removal). I have a general idea of what to do, but a few things seem to boggle me.
First, a few pics..
There's a bulging cap I was going to replace. The caps used are 'Fuhjyyu' brand.. which I read were rubbish.
Question: Do I need to keep the uF the same or can I go higher?
https://youtu.be/z2oSFpKh_Uw?list=FL...qhwKriX-qQLpoA
http://jumperone.com/2012/12/convert...supply-faq/#Q2
This is the one I'm (sort of) following. Though I wasn't planning on using the 3.3v.. probably just use the 5v and 12v connected to binding posts.
As for the dummy load, that's where I'm having some issues with. A couple of options I'm looking at are
1x led on the 5v (standby)
or
Using the psu fan (as suggested by a member in another forum), connecting it directly to a 12v wire and ground.
However, I'm wanting to use LED(s).. but.. I'm still a little uncertain on Resistors.
I had a look at the datasheet for some LEDs I'm considering getting, but am having trouble figuring out what specs/requirements they are..
http://pdf1.alldatasheet.com/datashe...GHT/L53HD.html
i think the above datasheet has details for all 3x LED's below ?
Kingbright L-53HD - 25mA max? (0.025 Amp)
Kingbright L-53ND - 30mA max? (0.030 Amp)
Kingbright L-53GD - 25mA max? (0.025 Amp)
According to RSOnline (where I'm looking to get from), they say
RED forward V = 2.25 V
Orange forward v = 2.05 V
Green forward V = 2 V
So, say I put the RED LED on the +5v Standby and I want to run 20mA (0.020 amps) through it.
RED LED has 2.25fV drop ? = 2.75v ?
R = V / I
R = 2.75 / 0.020
R = 135.5ohms ? will limit current to 20mA ? = ok to use on that LED ?
(orange R = 147.5)
(Green R = 150)
These are 133ohms,
http://au.rs-online.com/web/p/throug...stors/6833014/
which means
I = V / R
I = 2.75v / 133
I = 0.0206... ?
Is that right?
If so, that would mean the 133ohm resistors would still be ok for the orange and green LEDs (about 0.022A) ?
Appreciated any and all feedback
new here and to electronics, was hoping for some feedback on my current project.
I have an old Antec 350w PSU sitting ehre and I want to turn it into a PSU that I can use for Electrolysis (rust removal). I have a general idea of what to do, but a few things seem to boggle me.
First, a few pics..
There's a bulging cap I was going to replace. The caps used are 'Fuhjyyu' brand.. which I read were rubbish.
Question: Do I need to keep the uF the same or can I go higher?
https://youtu.be/z2oSFpKh_Uw?list=FL...qhwKriX-qQLpoA
http://jumperone.com/2012/12/convert...supply-faq/#Q2
This is the one I'm (sort of) following. Though I wasn't planning on using the 3.3v.. probably just use the 5v and 12v connected to binding posts.
As for the dummy load, that's where I'm having some issues with. A couple of options I'm looking at are
1x led on the 5v (standby)
or
Using the psu fan (as suggested by a member in another forum), connecting it directly to a 12v wire and ground.
However, I'm wanting to use LED(s).. but.. I'm still a little uncertain on Resistors.
I had a look at the datasheet for some LEDs I'm considering getting, but am having trouble figuring out what specs/requirements they are..
http://pdf1.alldatasheet.com/datashe...GHT/L53HD.html
i think the above datasheet has details for all 3x LED's below ?
Kingbright L-53HD - 25mA max? (0.025 Amp)
Kingbright L-53ND - 30mA max? (0.030 Amp)
Kingbright L-53GD - 25mA max? (0.025 Amp)
According to RSOnline (where I'm looking to get from), they say
RED forward V = 2.25 V
Orange forward v = 2.05 V
Green forward V = 2 V
So, say I put the RED LED on the +5v Standby and I want to run 20mA (0.020 amps) through it.
RED LED has 2.25fV drop ? = 2.75v ?
R = V / I
R = 2.75 / 0.020
R = 135.5ohms ? will limit current to 20mA ? = ok to use on that LED ?
(orange R = 147.5)
(Green R = 150)
These are 133ohms,
http://au.rs-online.com/web/p/throug...stors/6833014/
which means
I = V / R
I = 2.75v / 133
I = 0.0206... ?
Is that right?
If so, that would mean the 133ohm resistors would still be ok for the orange and green LEDs (about 0.022A) ?
Appreciated any and all feedback
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