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by bullen
Tue Mar 24, 2015 4:59 pm
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

The Foundation will never produce a non-standard setup for PoE. That would be insane, even if it were possible. I doubt they will even produce a standard PoE device - simply too expensive for a limited market when you can buy adapters to do the job for you. Yeah, I have given up. This is my new pat...
by bullen
Sat Mar 21, 2015 11:16 pm
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

I use 50 cm ethernet cables, no problem. So I guess that splitting would have to be custom, there are no ethernet jacks that provide the 4, 5, 7, 8 leads bare to the pcb? Also, to put a nail in the OP coffin, RPi 3 will certainly have USB type-C for power and ethernet? Is it bidirectional, so you ca...
by bullen
Sat Mar 21, 2015 11:06 pm
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

I don't care about standards and people that buy regular PoE for non PoE devices. I care about being able to build a switch that powers and connects 50 pis with ethernet cables only. To end this particular debate my flavour of PoE is not called PoE, lets call it "two pins on the ethernet plug can ta...
by bullen
Sat Mar 21, 2015 11:03 pm
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

yes but its the third time i say low voltage over short cable! As the schematic of the magnetics ports shows they have 75 Ohm termination resistors inside that make it impossible to put any kind of DC voltage on the pins you want to use for POE, and all the connectors with magnetics I have ever seen...
by bullen
Sat Mar 21, 2015 10:50 pm
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

You now need a voltage regulator / SMPS that can handle 7V0 to 30V0 and has to drop that to 3V3. That is going to take more PCB real estate and is going to cost a lot more for something that 99.9% of ALL users do NOT want and do NOT need. I'd prefer my Raspberry Pis complete with regular power adap...
by bullen
Sat Mar 21, 2015 8:43 am
Forum: Other projects
Topic: A DIY PoE solution
Replies: 36
Views: 87183

Re: A DIY PoE solution

Nice, wish the foundation did this on all Raspberries but directly without transforming and we'd make 5V switches!
by bullen
Sat Mar 21, 2015 8:39 am
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

Successful hack for desperate enough to void warranty! Exactly! Thanks for finding this, this is what I want the foundation to do on all pi's but without the transforming... @mahjongg http://www.rut500.net/wp-content/uploads/2013/03/RUT500-POE-Cable-Wiring-Diagram.gif Why cant you connect the 4 & 5...
by bullen
Fri Mar 20, 2015 9:43 pm
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

People who say that without the high voltage conversion its easy to add POE to the PI design forget that the PI by design uses an ethernet connector with built in magnetics, that do not allow POE, to adapt for POE the very least that would need to be done is to get rid of a connector with built in ...
by bullen
Wed Mar 18, 2015 6:32 pm
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

Ok Heater, sounds good, do you know when they have a deadline for something I can buy and what OS support do they have planned?
by bullen
Wed Mar 18, 2015 10:51 am
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

The 96boards specifications are aimed that way. Nice find: https://www.96boards.org/ . But it has wifi and other expensive stuff servers don't need. You may have noticed that the Raspberry Pi Foundation is an educational charity not a corporation seeking to make billions. I'm not interested in FIAT...
by bullen
Wed Mar 18, 2015 10:37 am
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

If there were a market for such a Pi based system, then it would be using custom boards and Compute Modules, not the standard Pi boards. PoE would not be required as the boards would have their own shared PSU. Yes, there will be, but that will take longer. Also the compute module is actually more e...
by bullen
Wed Mar 18, 2015 10:24 am
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

How would you guarantee exactly 5v0 (OK, not exactly but within +/- 5%) at the board when using PoE? The reason 48V is used is because of the volt drop in the Ethernet cable. Short cables. This "RPi cluster industry" does only exist in your mind. Yes, I know, but if you add the figures = 10x (1000%...
by bullen
Wed Mar 18, 2015 9:48 am
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

But the PoE spec, which the RPF would have to stick to (or folks would fry their RPis) is 48V0. You can't say "We've got PoE, but by the way don't send 48V0 because we're expecting 5V0". You don't have to call it PoE, you can just say: "For the hacker/maker crowd out there, we added a way to power ...
by bullen
Wed Mar 18, 2015 9:32 am
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

DougieLawson wrote:
bullen wrote:All it requires from the foundation is two leads from the ethernet port power to the board power.
And some heavy voltage regulation to drop 48V0 to 5V0.
Please read my post... we will use 5 volt PoE... no transformation, short cables.

Think outside of the box!
by bullen
Wed Mar 18, 2015 9:29 am
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

All it requires from the foundation is two leads from the ethernet port power to the board power. Hell at this speed you can use two leads on the ethernet port as dedicated power leads.

It's important to get the ball rolling on this in order to get the RPi cluster industry moving.
by bullen
Wed Mar 18, 2015 9:25 am
Forum: General discussion
Topic: POE support on Rpi 3
Replies: 107
Views: 17973

Re: POE support on Rpi 3

Like others here I find PoE on a future pi highly implausible, add up the cost of the beefier transformers, the control chip and the isolated DC-DC converters and you end up with something that adds a substantial chunk to the BoM cost of something like the Pi for an application that is outside the ...
by bullen
Sun Mar 08, 2015 8:35 am
Forum: General discussion
Topic: Any news on official Raspberry Display?
Replies: 260
Views: 96995

Re: Any news on official Raspberry Display?

http://core0.staticworld.net/images/article/2014/10/raspberrypidisplay-100526238-orig.png http://www.pcworld.com/article/2837433/new-raspberry-pi-goodies-inbound-official-display-accessory-revamped-a-model.html I don't really like that bezel, had hoped for a hardcore finish... also what is the poin...
by bullen
Sun Mar 08, 2015 8:28 am
Forum: Java
Topic: Could not initialize class gnu.io.CommPortIdentifier on tomc
Replies: 7
Views: 3659

Re: Could not initialize class gnu.io.CommPortIdentifier on

-cp and -jar don't work well together.

Try: java -Djava.library.path=/usr/lib/jni -cp /usr/share/java/RXTXcomm.jar:myApp.jar path.to.the.main.Class

Also if you wan't HTTP hot-deploy take a look at this.
by bullen
Thu Mar 05, 2015 10:25 am
Forum: Java
Topic: Remote Java programming
Replies: 15
Views: 9676

Re: Remote Java programming

Well, you won't know for sure until you have tried. I can deploy anywhere, port 80 is always open, to a cluster of raspberry pi's for example in my radio development, which is something you won't be able to do. Basically I found one way I can work remotely on every project involving HTTP, and it's a...
by bullen
Thu Mar 05, 2015 10:06 am
Forum: Java
Topic: Remote Java programming
Replies: 15
Views: 9676

Re: Remote Java programming

Fair enough. But there's a difference between fully pledged, stand alone java app vs specific app container. If you are making your own java app then there's different approach to developing for your app container. Yes, but once you get it working you won't be able to believe you ever worked in any...
by bullen
Wed Mar 04, 2015 7:32 pm
Forum: Java
Topic: Remote Java programming
Replies: 15
Views: 9676

Re: Remote Java programming

But with this you restart your java process, which takes time. My solution is instantaneous = ~1 sec total round trip. Turnaround is important!
by bullen
Wed Mar 04, 2015 7:29 pm
Forum: General discussion
Topic: Pebble Time Screen for RPi?
Replies: 4
Views: 784

Re: Pebble Time Screen for RPi?

That's it, I gave in and pledged. That screen looks so awesome, I know it is the future!
by bullen
Sun Mar 01, 2015 11:21 pm
Forum: General discussion
Topic: OpenGL
Replies: 4
Views: 759

Re: OpenGL

Ok, sounds like I'm not the only one who likes old school rendering (btw finish and flush are only called every frame and is not a problem, at least if you use lists <- this is buffering on the GPU) It's really sad how the high-poly, content heavy, boring game-play, brainwashed industry, managed to ...
by bullen
Sat Feb 28, 2015 10:50 pm
Forum: General discussion
Topic: OpenGL
Replies: 4
Views: 759

OpenGL

So I like the direct rendering mode better than ES vertex buffer style 3D programming.

Does the GPU on the Pi allow for OpenGL 1.0 begin/end drawing of triangles directly?
by bullen
Sat Feb 28, 2015 10:30 pm
Forum: General discussion
Topic: Pebble Time Screen for RPi?
Replies: 4
Views: 784

Re: Pebble Time Screen for RPi?

Ok, shame the screen is so small compared to the board.

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