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I would like to do PoE for some Pies, but I dont like the real-estate the PoE hat takes up. what exactly is required for the PoE to work? what pins must I use on the raspberry PI, and what does the PoE hat do?
An electronic schematic would be nice. I saw the mechanical drawing of the PoE hat, its pretty vague.
my guess is that PoE comes in at ~48VDC, and that gets converted to +5VDC, with maybe some noise filtering. But is that all?
what are the 4 POE pins on the raspberry PI?
networking power-supply poe
asked 8 hours ago
j0hj0h
1,1504 gold badges14 silver badges27 bronze badges
add a comment |
I would like to do PoE for some Pies, but I dont like the real-estate the PoE hat takes up. what exactly is required for the PoE to work? what pins must I use on the raspberry PI, and what does the PoE hat do?
An electronic schematic would be nice. I saw the mechanical drawing of the PoE hat, its pretty vague.
my guess is that PoE comes in at ~48VDC, and that gets converted to +5VDC, with maybe some noise filtering. But is that all?
what are the 4 POE pins on the raspberry PI?
networking power-supply poe
asked 8 hours ago
j0hj0h
1,1504 gold badges14 silver badges27 bronze badges
This is a standard Gigabit PoE connection; not specific to the Pi, although Peter Green's answer is correct, you should ask on an EE site.
– Milliways
5 hours ago
It's pretty uncommon to see devices that expose the cable side center taps in the way the pi 3B+/4 do.
– Peter Green
4 hours ago
add a comment |
I would like to do PoE for some Pies, but I dont like the real-estate the PoE hat takes up. what exactly is required for the PoE to work? what pins must I use on the raspberry PI, and what does the PoE hat do?
An electronic schematic would be nice. I saw the mechanical drawing of the PoE hat, its pretty vague.
my guess is that PoE comes in at ~48VDC, and that gets converted to +5VDC, with maybe some noise filtering. But is that all?
what are the 4 POE pins on the raspberry PI?
networking power-supply poe
asked 8 hours ago
j0hj0h
1,1504 gold badges14 silver badges27 bronze badges
I would like to do PoE for some Pies, but I dont like the real-estate the PoE hat takes up. what exactly is required for the PoE to work? what pins must I use on the raspberry PI, and what does the PoE hat do?
An electronic schematic would be nice. I saw the mechanical drawing of the PoE hat, its pretty vague.
my guess is that PoE comes in at ~48VDC, and that gets converted to +5VDC, with maybe some noise filtering. But is that all?
what are the 4 POE pins on the raspberry PI?
networking power-supply poe
networking power-supply poe
asked 8 hours ago
j0hj0h
1,1504 gold badges14 silver badges27 bronze badges
asked 8 hours ago
j0hj0h
1,1504 gold badges14 silver badges27 bronze badges
asked 8 hours ago
j0hj0h
1,1504 gold badges14 silver badges27 bronze badges
asked 8 hours ago
j0hj0h
1,1504 gold badges14 silver badges27 bronze badges
asked 8 hours ago
j0hj0h
1,1504 gold badges14 silver badges27 bronze badges
1,1504 gold badges14 silver badges27 bronze badges
This is a standard Gigabit PoE connection; not specific to the Pi, although Peter Green's answer is correct, you should ask on an EE site.
– Milliways
5 hours ago
It's pretty uncommon to see devices that expose the cable side center taps in the way the pi 3B+/4 do.
– Peter Green
4 hours ago
add a comment |
This is a standard Gigabit PoE connection; not specific to the Pi, although Peter Green's answer is correct, you should ask on an EE site.
– Milliways
5 hours ago
It's pretty uncommon to see devices that expose the cable side center taps in the way the pi 3B+/4 do.
– Peter Green
4 hours ago
This is a standard Gigabit PoE connection; not specific to the Pi, although Peter Green's answer is correct, you should ask on an EE site.
– Milliways
5 hours ago
This is a standard Gigabit PoE connection; not specific to the Pi, although Peter Green's answer is correct, you should ask on an EE site.
– Milliways
5 hours ago
It's pretty uncommon to see devices that expose the cable side center taps in the way the pi 3B+/4 do.
– Peter Green
4 hours ago
It's pretty uncommon to see devices that expose the cable side center taps in the way the pi 3B+/4 do.
– Peter Green
4 hours ago
add a comment |
1 Answer
1
active
oldest
votes
what are the 4 POE pins on the raspberry PI?
They are the four cable side center taps off the Ethernet magjack.
what does the PoE hat do?
Broadly speaking it
- Rectifies the incoming power from the four cable-side center taps with an extended bridge rectifier (8 diodes, probably Schottky rectifier types)
- Presents the correct impedances during the PoE negotiation phase to turn the power source on.
- Provides isolated conversion from the 48V PoE supply to the 5V needed for the raspberry pi.
- Feeds that back into the Pi through the 5V pins on the GPIO header.
answered 6 hours ago
Peter GreenPeter Green
1,7998 silver badges14 bronze badges
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
what are the 4 POE pins on the raspberry PI?
They are the four cable side center taps off the Ethernet magjack.
what does the PoE hat do?
Broadly speaking it
- Rectifies the incoming power from the four cable-side center taps with an extended bridge rectifier (8 diodes, probably Schottky rectifier types)
- Presents the correct impedances during the PoE negotiation phase to turn the power source on.
- Provides isolated conversion from the 48V PoE supply to the 5V needed for the raspberry pi.
- Feeds that back into the Pi through the 5V pins on the GPIO header.
answered 6 hours ago
Peter GreenPeter Green
1,7998 silver badges14 bronze badges
add a comment |
what are the 4 POE pins on the raspberry PI?
They are the four cable side center taps off the Ethernet magjack.
what does the PoE hat do?
Broadly speaking it
- Rectifies the incoming power from the four cable-side center taps with an extended bridge rectifier (8 diodes, probably Schottky rectifier types)
- Presents the correct impedances during the PoE negotiation phase to turn the power source on.
- Provides isolated conversion from the 48V PoE supply to the 5V needed for the raspberry pi.
- Feeds that back into the Pi through the 5V pins on the GPIO header.
answered 6 hours ago
Peter GreenPeter Green
1,7998 silver badges14 bronze badges
add a comment |
what are the 4 POE pins on the raspberry PI?
They are the four cable side center taps off the Ethernet magjack.
what does the PoE hat do?
Broadly speaking it
- Rectifies the incoming power from the four cable-side center taps with an extended bridge rectifier (8 diodes, probably Schottky rectifier types)
- Presents the correct impedances during the PoE negotiation phase to turn the power source on.
- Provides isolated conversion from the 48V PoE supply to the 5V needed for the raspberry pi.
- Feeds that back into the Pi through the 5V pins on the GPIO header.
answered 6 hours ago
Peter GreenPeter Green
1,7998 silver badges14 bronze badges
what are the 4 POE pins on the raspberry PI?
They are the four cable side center taps off the Ethernet magjack.
what does the PoE hat do?
Broadly speaking it
- Rectifies the incoming power from the four cable-side center taps with an extended bridge rectifier (8 diodes, probably Schottky rectifier types)
- Presents the correct impedances during the PoE negotiation phase to turn the power source on.
- Provides isolated conversion from the 48V PoE supply to the 5V needed for the raspberry pi.
- Feeds that back into the Pi through the 5V pins on the GPIO header.
answered 6 hours ago
Peter GreenPeter Green
1,7998 silver badges14 bronze badges
answered 6 hours ago
Peter GreenPeter Green
1,7998 silver badges14 bronze badges
answered 6 hours ago
Peter GreenPeter Green
1,7998 silver badges14 bronze badges
answered 6 hours ago
Peter GreenPeter Green
1,7998 silver badges14 bronze badges
1,7998 silver badges14 bronze badges
add a comment |
add a comment |
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This is a standard Gigabit PoE connection; not specific to the Pi, although Peter Green's answer is correct, you should ask on an EE site.
– Milliways
5 hours ago
It's pretty uncommon to see devices that expose the cable side center taps in the way the pi 3B+/4 do.
– Peter Green
4 hours ago