Hey there!
I´ve been working on my bench HHO generator for a year now and ran into all kinds of set backs, the latest being my 12V 60A power supply blowing up (my mistake) and not being able to get proper/accurate readings from many of my Voltmeter/Ammeters LED displays with external shunts.
After blowing my first PSU, I ordered another one, virtualy the same one, and as soon as I plug in the AC my house lights went out. It obviously came untested and defective.
I open it up and couldn´t find a fuse, anything burned or a phisical short. What could I do about it?
Here is the link: https://www.ebay.com/itm/110V-220V-to-DC5V-12V-24V-48V-Switch-Power-Supply-Driver-Adapter-LED-Strip-Light/142462540092?ssPageName=STRK:MEBIDX:IT&var=441462113857&_trksid=p2060353.m2749.l2649
I should mention that I´m using a 100A capable PWM, even though I will only be pushing 50A through the 21 plate Cell (12V), wich was starting to push the PSU to it´s max. So I ordered the meter with a 100A Shunt so it would have some margin.
Regarding the ammeter/voltmeter display, I bought many of these cheap LED displays with external shunt off ebay (100A shunt):
https://www.ebay.com/itm/DC-100V-50...8a083b7eb:m:mHY20U0Ke_v6ujQYuW3PEOg:rk:1:pf:0
I wired the led meter as it shows in the pretty diagram. This way it powers it self from the same source and should give me both V and A reading but that´s not the case. It shows V alright but stops at 2A
(In my drawing, forget the "yellow and blue", that´s from a different meter, I wired it has it shows in the diagram.)
*The only time I got a good reading was when I used a smaller 50A shunt and a diferent meter with only A reading. It would read all the way to 60A despite heating up quite a bit. Using that same meter but with the 100A shunt, It only climbed to 20A! I think part of the problem is the shunt I´m using idk.
I tried moving the shunt between the PSU and PWM, instead of between PWM and Cell (It´s how it is now), with the same result.
If you spot any error on the diagrams, please let me know!
If my meter is somehow broken, I was considering buying this one from Ali:
https://www.aliexpress.com/item/ATO...&terminal_id=0f866152f0af467ba52d4c68b8f7b64a
Any thoughts on this one? Could it handle the 50A? Or are there better ones considering my set up?
I´ve been working on my bench HHO generator for a year now and ran into all kinds of set backs, the latest being my 12V 60A power supply blowing up (my mistake) and not being able to get proper/accurate readings from many of my Voltmeter/Ammeters LED displays with external shunts.
After blowing my first PSU, I ordered another one, virtualy the same one, and as soon as I plug in the AC my house lights went out. It obviously came untested and defective.
I open it up and couldn´t find a fuse, anything burned or a phisical short. What could I do about it?
Here is the link: https://www.ebay.com/itm/110V-220V-to-DC5V-12V-24V-48V-Switch-Power-Supply-Driver-Adapter-LED-Strip-Light/142462540092?ssPageName=STRK:MEBIDX:IT&var=441462113857&_trksid=p2060353.m2749.l2649
I should mention that I´m using a 100A capable PWM, even though I will only be pushing 50A through the 21 plate Cell (12V), wich was starting to push the PSU to it´s max. So I ordered the meter with a 100A Shunt so it would have some margin.
Regarding the ammeter/voltmeter display, I bought many of these cheap LED displays with external shunt off ebay (100A shunt):
https://www.ebay.com/itm/DC-100V-50...8a083b7eb:m:mHY20U0Ke_v6ujQYuW3PEOg:rk:1:pf:0
I wired the led meter as it shows in the pretty diagram. This way it powers it self from the same source and should give me both V and A reading but that´s not the case. It shows V alright but stops at 2A
(In my drawing, forget the "yellow and blue", that´s from a different meter, I wired it has it shows in the diagram.)
*The only time I got a good reading was when I used a smaller 50A shunt and a diferent meter with only A reading. It would read all the way to 60A despite heating up quite a bit. Using that same meter but with the 100A shunt, It only climbed to 20A! I think part of the problem is the shunt I´m using idk.
I tried moving the shunt between the PSU and PWM, instead of between PWM and Cell (It´s how it is now), with the same result.
If you spot any error on the diagrams, please let me know!
If my meter is somehow broken, I was considering buying this one from Ali:
https://www.aliexpress.com/item/ATO...&terminal_id=0f866152f0af467ba52d4c68b8f7b64a
Any thoughts on this one? Could it handle the 50A? Or are there better ones considering my set up?
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