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Stronger PSU wanted
#11
I forgot my 12v beast @60 amp!
I ordered some step down converters for a other experiment(12a max).
Lets try it with them.

Those pc psu's, even if i connect 15000uF/25v the tc/tp and the zb will keep on blinking.
The output is 5v and 20amp from the pc psu, i was asking 9.5 amp.

Thanks for sharing your thoughts, ideas are still welcome
Still learning English. Learning Li ion and solar technology.
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#12
If the psu was still blinking, I'd say the unit is about dead. There's no reason why it should struggle when your pulling 1/2 of it's max rated current. what brand is the psu and how old?
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#13
They are pretty old, year of build: 1988-1995,
The pc psu's are stored in my woodworking shed uninsulated, temps below -10 degrees and up to 40 degrees celsius.
Some other industrial psu are also broke and some working if nothing happened.
(One of the industrial psu's got his capacitors smoking and the transistors red hot within 2 minutes....  Confused)
Before taking into use, i clean them thoroughly in and outside with high air pressure.

I get a feeling it could be the capacitors, also 10-20 years of age.
There was also no voltage drop

Sorry didnt make any picture while it was in the setup.







Why are my photo's up side down?
The big blue one is 7500uf at 25v the big grey one is 22000uf

Thanks in advance
Still learning English. Learning Li ion and solar technology.
+/- 3500 Li ion cells harvested, none checked and counting.

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
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#14
For image issue, go here: https://secondlifestorage.com/t-Image-rotation-issues

Ahhh, ooooold psu's. Yeah, if the internal caps are going bad, you'll get bad voltage drops. There might be other parts failing too.

Pretty good that you got the length of life out of them as you did. Nice vintage units. They don't make it like that anymore, to last.
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at Discord Chat (channels: general, 3d-printing, linux&coding, 18650, humor, ...)
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#15
Those old one were built for 5V as primary, so they are definitely better than today's 12V ones for your purpose.
I'd just replace some of these capacitors with some good ones (new or even old Soviet-era high durability ones) and keep using them.
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