Hello again guys, Per this article I should use 19V/3.2A power supply
Got 12V one with my R4 so I wonder if I could safely use this old universal power supply when set to 19V?
Afaik 12V+ is only for usb-c. It looks like your adapter uses the dc jack,right?
I do not have PRO version, but I could be able to use 19V power source on DC jack of bpi-r4.
On the bpi-r4 PRO could be used 12/24V power source:
Why it is not possible use 12V, 19V and on PRO version even 24V on every connector? Am I missing something?
Oh ok, yes this one has DC jack and R4 is not a PRO version so it’s says only12V on DC port. Got it, thank you!
Sorry, my mistake that I was thinking that you are asking to the PRO version. Can you take a look at this post?
There should be possible to connect 19V power source on DC jack = DCIN(5521) on bpi-r4 NON PRO version.
Yes I got impression from this thread that I should use 19V DC when using WiFi NIC?
Anyway I hooked 45W USB-C now but on the back it says max output: 20V/2.25A is that enough for the board and NIC?
In fact, the power supply voltage that R4 can accept is 9~24V, but the power consumption of R4 is relatively large. When the voltage is too low, the current required increases, which may easily lead to voltage instability and shutdown or restart. Therefore, it is recommended that if you do not use a WiFi network card, Use a 12V power adapter. but use a 19V power adapter when the WiFi NIC card is inserted
Sorry, I will not tell you any precise numbers here, this is only your decision, but…
You should calculate it as sum of maximum power consumption of every thing you connect to the board + the consumption of bpi-r4 itself, and get more powerfull power source.
I have my own “constant” to get power source with at least 50% but ideally 100% more power than i calculate to prevent too much heat of the power source itself (which prolongs power source life) and assure some reserves.
I’ve tried two power supply methods: 20V USB-C via DP and 12V DC. Under the same usage conditions, the CPU temperature is lower with 12V DC.
Yes, that USB adapter was getting really hot. So I took my chances and plugged adapter from the photo set to 19V/4.5A. So far everything is good, power source is cool, BPI stable and even WiFi seems more stable to me. Dunno, I will keep it this way for now.
I’m using an idle MW LRS-100-12 power supply, which has a ground connection. Connecting its chassis directly to the BPI-R4’s case might help with Wi-Fi, but since I’m not using the Wi-Fi BE14 module, I haven’t tested it. However, when powering both an 8-port SFP 10GbE L3 switch and the BPI-R4 (with one NVMe disk) using the LRS-100-12, the total power consumption is only 12W.
As I am using bpi-r4 as a NAS and gw and I have connected to it many sata hard drives, I am using dual voltage output ACDC power source. Therefore I do not know exact power consumption of r4 itself. But I am thinking, how it is possible that the CPU itself have bigger temperature when powering up from USB-C? It have to have stable voltage and therefore exactly the same consumption, or am I missing something?
Do you think, that it is possible to connect 12V power supply to the VH-2PIN connector?
Supplying 12V DC directly is closer to the BPI-R4’s design voltage, with shorter conversion paths and less heat. USB-C PD 20V adds an extra high-voltage buck stage, making the power management IC work harder, which increases the CPU’s temperature.
I really don’t wanna take it apart and test again – already wasted too much time on this board. The DC5021 plug’s easy to get, but that 2-pin one’s a pain. Don’t really see the point of faffing with the 2-pin.
OK, understand. My goal is, that I am using bpi-r4 in much bigger case and it will be powered using internal 12V power source instead of the external one. Therefore I want use internal connector, therefore I was asking if it is ok to connect 12V to the VH-2pin internal connector as there is DC 20V only on the documentation.
Does there is missing information if it is ok to use 12-20V on the VH-2pin?