7i96S PSU
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07 May 2024 00:16 - 07 May 2024 00:18 #299982
by Project_Hopeless
7i96S PSU was created by Project_Hopeless
Would there be anything wrong using a 24 to 5 vdc power buck to power a Mesa 7i96S card?
Or how about a cell phone charger? Got plenty of those.
Or how about a cell phone charger? Got plenty of those.
Last edit: 07 May 2024 00:18 by Project_Hopeless.
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07 May 2024 02:30 #299996
by spumco
The 24v->5v buck converter I had gave me fits with intermitent low voltages that reset the 7i96S and caused what appears as network latency issues.
A 5v cell phone charger I hacked in there has been fine for a few months. I've got a Meanwell waiting for it to die, but haven't bothered to stick it in yet.
A 5v cell phone charger I hacked in there has been fine for a few months. I've got a Meanwell waiting for it to die, but haven't bothered to stick it in yet.
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07 May 2024 08:27 #300016
by tommylight
Replied by tommylight on topic 7i96S PSU
-older original Samsung chargers work perfectly
-avoid cheap china ones
-most buck converters work, but vary voltage with change in temperature, so i set them at 4.7-4.9V.
-never use buck/boost converters to power Mesa or relays.
-avoid cheap china ones
-most buck converters work, but vary voltage with change in temperature, so i set them at 4.7-4.9V.
-never use buck/boost converters to power Mesa or relays.
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07 May 2024 09:37 - 07 May 2024 09:39 #300023
by Unlogic
Given that the 5v supply powers the logic section of the board I'd have to agree with rodw. It's the wrong part of the build to cut corners. The Meanwell power supplies are a safe bet and not too expensive.There have been a number of reports of people having problems with USB/phone chargers.
I would stick to a Meanwell MDR-10-5 (2 amp) or a bit higher... DIN rail mount or similar.
Last edit: 07 May 2024 09:39 by Unlogic.
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09 May 2024 02:19 #300180
by spumco
As long as the OP stays away from cheapo buck converters, that's the important part.
You're both right, of course, about not cutting corners here; no argument from me on that one.
There have been a number of reports of people having problems with USB/phone chargers.
I would stick to a Meanwell MDR-10-5 (2 amp) or a bit higher... DIN rail mount or similar.
Given that the 5v supply powers the logic section of the board I'd have to agree with rodw. It's the wrong part of the build to cut corners. The Meanwell power supplies are a safe bet and not too expensive.
As long as the OP stays away from cheapo buck converters, that's the important part.
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11 May 2024 23:54 #300411
by Project_Hopeless
So a RS style Meanwell would also work?
Replied by Project_Hopeless on topic 7i96S PSU
I was hopping to get away with a single PSU for the system, control boards and step drivers.rodw post=300008 userid=20660There have been a number of reports of people having problems with USB/phone chargers.
I would stick to a Meanwell MDR-10-5 (2 amp) or a bit higher... DIN rail mount or similar.
So a RS style Meanwell would also work?
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12 May 2024 02:32 #300417
by rodw
You have to be careful here. I have a 12v/5v Meanwell power supply (in a frame) that is useless for this because the 5v side needs a load on it for the 12v side to work. The required load far exceeds the power draw of a Mesa card. It was suggested I add a ceramic resistor but the generated heat and power consumption made me scrap the idea. Seperate 24v and 5v DIN rail based power supplies are compact, less risky and much easier.
As fas as steppers are concerned, 48 volts is much better (if supported by your drivers) so you really end up needing 3 power supplies.
As fas as steppers are concerned, 48 volts is much better (if supported by your drivers) so you really end up needing 3 power supplies.
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12 May 2024 10:42 #300432
by tommylight
Replied by tommylight on topic 7i96S PSU
In case anyone needs 5 and 12V only, buy a PC power supply from Seasonic.
All new PC power supplies i have dismantled have a 12V rail only and the rest is done by dc-dc converters.
Word of warning though, they easily do 50 to 100A at 12V so shorts are very sparky!![:) :)](/media/kunena/emoticons/smile.png)
They also have very good protections. In short, they are much higher quality than Meanwell, by far.
All new PC power supplies i have dismantled have a 12V rail only and the rest is done by dc-dc converters.
Word of warning though, they easily do 50 to 100A at 12V so shorts are very sparky!
![:) :)](/media/kunena/emoticons/smile.png)
They also have very good protections. In short, they are much higher quality than Meanwell, by far.
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