4 ms·

I wonder if it's possible to power one of these boards off ethernet?

by leke 6y ago

duskwuff 6y ago
I don't know about this board, but there's an official kit for doing that on the Raspberry Pi: https://www.raspberrypi.org/products/poe-hat/ https://www.raspberrypi.org/products/poe-hat/
- tracker1 6y ago
  Don't seem to be able to buy it, it blocks being able to actively cool the cpu and no idea on fit with 3rd party cases, but it looks small enough that it wouldn't be an issue with many. I kind of wish they'd have a new release with a form factor for those wanting to play with a pi cluster, all the i/o on one side, and PoE on board.
  - StavrosK 6y ago
    Why can't you actively cool the CPU? It has its own fan.
    - tracker1 6y ago
      because the board covers the pi board underneath?
      - StavrosK 6y ago
        Plenty of room for the air to escape from the sides though.
  - tjoff 6y ago
    Don't know much about it but wouldn't that be something more in line with the pi compute module? I know there are boards that take 4 compute modules for instance. They might be better to stack as well.
- youngtaff 6y ago
  Official board is horribly noisy when the fan is running. Basically the fan's too small (despite their being room for a much larger one) I'm hoping for a POE board for the new compute module - I want ethernet (w POE), USB and storage in a small package, something the size of original Ubiquiti Cloudkeys would be ideal. Gumstix have a POE board for the CM4 but it comes with a Coral chip also but it's out of the price range for what I need - https://www.gumstix.com/manufacturer/raspberry-pi/cm4-poe-smart-camera.html https://www.gumstix.com/manufacturer/raspberry-pi/cm4-poe-sm...
- Macha 6y ago
  Having got one of these and a PoE -> ethernet + microusb power splitter for my 2 pis, I have to say I've been much happier with the splitter than the hat - the hat uses space that could be used to install other things and has quite an annoyingly noisy fan.
cosmotic 6y ago
I have not yet seen a pi or pi-related board that supports 802.3af right into the jack and right out of the box. A few support surprisingly large add-on boards that connect to the GPIO pins and to a set of pins near the RJ45 so you can still use the built in jack for data and power. You can always use a non-standard or even standard injector/tap but that's probably not what you're after. I have a side project where I disassembled a 802.3af tap and USB ethernet board and wired it all directly into a PiZero. The POE tap and USB ethernet boards are pretty small internally. The POE tap has a cat5-like header that comes off I just wired straight into the pads the ethernet controller was using while removing the RJ45 plug on the board. https://imgur.com/0gBj23G https://imgur.com/0gBj23G

I wonder if it's possible to power one of these boards off ethernet?

by leke 6y ago

I wonder if it's possible to power one of these boards off ethernet?

I don't know about this board, but there's an official kit for doing that on the Raspberry Pi: https://www.raspberrypi.org/products/poe-hat/ https://www.raspberrypi.org/products/poe-hat/

tracker1 6y ago
Don't seem to be able to buy it, it blocks being able to actively cool the cpu and no idea on fit with 3rd party cases, but it looks small enough that it wouldn't be an issue with many. I kind of wish they'd have a new release with a form factor for those wanting to play with a pi cluster, all the i/o on one side, and PoE on board.
- StavrosK 6y ago
  Why can't you actively cool the CPU? It has its own fan.
  - tracker1 6y ago
    because the board covers the pi board underneath?
    - StavrosK 6y ago
      Plenty of room for the air to escape from the sides though.
- tjoff 6y ago
  Don't know much about it but wouldn't that be something more in line with the pi compute module? I know there are boards that take 4 compute modules for instance. They might be better to stack as well.
youngtaff 6y ago
Official board is horribly noisy when the fan is running. Basically the fan's too small (despite their being room for a much larger one) I'm hoping for a POE board for the new compute module - I want ethernet (w POE), USB and storage in a small package, something the size of original Ubiquiti Cloudkeys would be ideal. Gumstix have a POE board for the CM4 but it comes with a Coral chip also but it's out of the price range for what I need - https://www.gumstix.com/manufacturer/raspberry-pi/cm4-poe-smart-camera.html https://www.gumstix.com/manufacturer/raspberry-pi/cm4-poe-sm...
Macha 6y ago
Having got one of these and a PoE -> ethernet + microusb power splitter for my 2 pis, I have to say I've been much happier with the splitter than the hat - the hat uses space that could be used to install other things and has quite an annoyingly noisy fan.

cosmotic 6y ago

I have not yet seen a pi or pi-related board that supports 802.3af right into the jack and right out of the box. A few support surprisingly large add-on boards that connect to the GPIO pins and to a set of pins near the RJ45 so you can still use the built in jack for data and power. You can always use a non-standard or even standard injector/tap but that's probably not what you're after. I have a side project where I disassembled a 802.3af tap and USB ethernet board and wired it all directly into a PiZero. The POE tap and USB ethernet boards are pretty small internally. The POE tap has a cat5-like header that comes off I just wired straight into the pads the ethernet controller was using while removing the RJ45 plug on the board. https://imgur.com/0gBj23G https://imgur.com/0gBj23G