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by hippy
Sun Jul 22, 2018 8:14 am
Forum: Automation, sensing and robotics
Topic: Can RPi3B Supply Power Over Ethernet (POE) for IP Camera?
Replies: 13
Views: 246

Re: Can RPi3B Supply Power Over Ethernet (POE) for IP Camera?

The Pi cannot supply PoE itself. To do that you would need to use an external PoE injector with an additional power supply. The Pi would be able to receive the data back from the camera but you may have to configure your Pi to provide an IP address for the camera - .------------. .-----. | |_| | PSU...
by hippy
Sat Jul 21, 2018 9:59 pm
Forum: Troubleshooting
Topic: Raspberry Pi 3B+ 3.3v short to ground
Replies: 7
Views: 209

Re: Raspberry Pi 3B+ 3.3v short to ground

Momentarily* shorting the 3.3 volt rail to ground should not result in any device other than the PMC putting a permanent short to ground. But it's extremely unpredictable what happens when a device which uses multiple power rails loses one of those power rails. That can have knock-ons, can cause ot...
by hippy
Sat Jul 21, 2018 8:46 pm
Forum: Automation, sensing and robotics
Topic: Can RPi3B Supply Power Over Ethernet (POE) for IP Camera?
Replies: 13
Views: 246

Re: Can RPi3B Supply Power Over Ethernet (POE) for IP Camera?

PoE does not work like you envisage, the unused wires in the Ethernet Cable are used to carry the power: https://en.wikipedia.org/wiki/Power_over_Ethernet PoE can be supplied by separate pairs or by superimposing the supply to the device being powered on data carrying pairs as that Wikipedia articl...
by hippy
Sat Jul 21, 2018 7:34 pm
Forum: Automation, sensing and robotics
Topic: Can RPi3B Supply Power Over Ethernet (POE) for IP Camera?
Replies: 13
Views: 246

Re: Can RPi3B Supply Power Over Ethernet (POE) for IP Camera?

PoE does not work like you envisage, the unused wires in the Ethernet Cable are used to carry the power: https://en.wikipedia.org/wiki/Power_over_Ethernet PoE can be supplied by separate pairs or by superimposing the supply to the device being powered on data carrying pairs as that Wikipedia articl...
by hippy
Sat Jul 21, 2018 5:58 pm
Forum: Troubleshooting
Topic: Raspberry Pi 3B+ 3.3v short to ground
Replies: 7
Views: 209

Re: Raspberry Pi 3B+ 3.3v short to ground

I am guessing the PMIC will shut down all outputs when a short is detected. That seems to be correct from my reading of the datasheet. Though as it's a programmable chip and what it actually does can be programmed, unless how it is programmed is known, it would not be possible to say what the exact...
by hippy
Sat Jul 21, 2018 5:31 pm
Forum: Automation, sensing and robotics
Topic: Can RPi3B Supply Power Over Ethernet (POE) for IP Camera?
Replies: 13
Views: 246

Re: Can RPi3B Supply Power Over Ethernet (POE) for IP Camera?

It's an interesting question as to whether the PoE connections on the Pi 3B+ can be used in reverse; to be a provider for power. It would still need 48V or whatever adding to be injected. It might be possible to put 5V out. I just wish I had money to burn, or a supply of free Pi, then I'd happily tr...
by hippy
Sat Jul 21, 2018 12:20 pm
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness - Or how I learnt to stop worrying and love the new website

The good old days of RSS feeds. I had initially thought and written that but, having checked, the RSS feed only includes the most recent blog entries. One can use the RSS feed to determine if there's been an update, but to have a list of everything means tracking and collating the feed items and it...
by hippy
Sat Jul 21, 2018 11:20 am
Forum: Troubleshooting
Topic: Raspberry Pi 3B+ 3.3v short to ground
Replies: 7
Views: 209

Re: Raspberry Pi 3B+ 3.3v short to ground

From my reading the MXL7704-R3 chip does the voltage regulation on the 3B+. What I want to do is isolate the 3.3v easily to see which direction the 3.3v is shorted without removing the MXL7704-R3. Is there any trace or passive component I can remove/cut to isolate it? My guess, with reference to th...
by hippy
Sat Jul 21, 2018 10:56 am
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness - Or how I learnt to stop worrying and love the new website

I think a bunch of fixes went in yesterday for some browser issues, might be worth trying again. I'm now finding the "Buy" has stopped animating on the home page, works on other pages - where it sometimes jams-up in its mouse-over state, during which time other animations stop working. And when one...
by hippy
Fri Jul 20, 2018 9:06 pm
Forum: General discussion
Topic: Is it suitable? For a Computer Science course?
Replies: 20
Views: 571

Re: Is it suitable? For a Computer Science course?

Hard to say. I'm not against the idea but are you going to provide a monitor and everything else ?

He might be better off with a laptop. Depends what he's doing. Where he's doing it.

Asking him is the probably the best thing.
by hippy
Fri Jul 20, 2018 1:31 pm
Forum: Troubleshooting
Topic: Send Output to Composite/HDMI At Boot Time
Replies: 9
Views: 197

Re: Send Output to Composite/HDMI At Boot Time

procount wrote:
Fri Jul 20, 2018 11:29 am
Even in standby, a HDMI monitor can provide its EDID information, so it will appear connected.
If I reboot my Pi it selects 1080p if my TV is already on, falls back to 640x480 over HDMI if rebooted with the TV in standby.

I've not dug into what's going on, I just reboot if it's wrong.
by hippy
Fri Jul 20, 2018 12:00 pm
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness

grega wrote:
Fri Jul 20, 2018 11:49 am
hippy wrote:
Fri Jul 20, 2018 10:57 am
That should keep everyone happy.
I love your optimism :D
True. Maybe I should have said; will make some people happier.

But what about the idea itself ?
by hippy
Fri Jul 20, 2018 10:57 am
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness

Interestingly, the homepage is now loading (and thus becomes usable) 3x faster than the previous one (mean avg over 13 distributed regions), always plenty more work to do and critical feedback is most welcome True; it loads and renders pretty fast for me, on my desktop PC and on my Pi 3B. It's some...
by hippy
Fri Jul 20, 2018 10:28 am
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness

grega wrote:
Fri Jul 20, 2018 9:53 am
re. Chrome 49 - I'd recommend an update.
So would I but that's the latest version of Chrome which Google supports on the PC I am using.

If anyone wants to send me the money to upgrade my PC and OS or buy me a better one they are more than welcome to do so.
by hippy
Fri Jul 20, 2018 9:52 am
Forum: General discussion
Topic: Gone : install MicroPython on ESP32 - fail to load rshell
Replies: 0
Views: 59

Gone : install MicroPython on ESP32 - fail to load rshell

The "install MicroPython on ESP32 - fail to load rshell" thread started by guyd seems to have disappeared - https://www.raspberrypi.org/forums/viewtopic.php?f=62&t=218464 Rather annoyingly while I was composing a reply. I don't know why it's gone but can guess it's because mods assumed it wasn't rel...
by hippy
Fri Jul 20, 2018 9:08 am
Forum: Beginners
Topic: Email
Replies: 6
Views: 143

Re: Email

But im confused as to where I would put the subject condition, so if I want the email with any subject which contains 'Bananas are the greatest nut' what would I do next? I would have thought it would only require changing - for message in messages: print message['subject'] to - for message in mess...
by hippy
Fri Jul 20, 2018 1:07 am
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness

Forum ... A few mentions about that which confused me. The forum looks exactly the same for me as it always has. But is different when viewed with another browser, perhaps because I've never logged in with that, no cookies set ? Does it depend on which theme is selected or is it something else weird...
by hippy
Fri Jul 20, 2018 12:27 am
Forum: General programming discussion
Topic: What Does Hiding the Details of I/O in Library Calls Teach?
Replies: 63
Views: 1520

Re: What Does Hiding the Details of I/O in Library Calls Teach?

He is not into big theoretical discussions about grammars and parsers and compiler design in an academic way. No, he says this is how we are going to do it, rolls his sleeves up and starts coding, in real time, live streamed. I guess that's the problem I have. In fairness it's probably mostly that ...
by hippy
Thu Jul 19, 2018 9:38 pm
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness

That page is 3.5MB the JS is only 100KB of that or so. I'll take your word for it. That's incredible bloat. I'm not against decoration and pretty graphics to draw people in; but for what amounts to about 3.5KB of actual information on the page - Raspberry Pi - A small and affordable computer that y...
by hippy
Thu Jul 19, 2018 8:30 pm
Forum: General programming discussion
Topic: What Does Hiding the Details of I/O in Library Calls Teach?
Replies: 63
Views: 1520

Re: What Does Hiding the Details of I/O in Library Calls Teach?

All the Bitwise source code and documentation (such as it is) is in github: https://github.com/pervognsen/bitwise/ There is also a Bitwise forum: https://bitwise.handmade.network/forums Thanks. It all seems a bit like "here it is" rather than "what it's about". Feels a bit like the ivory tower atti...
by hippy
Thu Jul 19, 2018 7:54 pm
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness

PIORG.jpg
PIORG.jpg (40.46 KiB) Viewed 733 times
PIORG2.jpg
PIORG2.jpg (33.25 KiB) Viewed 733 times
by hippy
Thu Jul 19, 2018 7:15 pm
Forum: General programming discussion
Topic: What Does Hiding the Details of I/O in Library Calls Teach?
Replies: 63
Views: 1520

Re: What Does Hiding the Details of I/O in Library Calls Teach?

Bitwise is an interesting project to follow as it shows off a lot of cool tricks for software creation and hardware design which can be useful even if you don't want to build your own computer from scratch. Bitwise: https://www.youtube.com/watch?v=ZjwvMcP3Nf0&list=PLU94OURih-CiP4WxKSMt3UcwMSDM3aTtX...
by hippy
Thu Jul 19, 2018 5:36 pm
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness

https://raspberrypi.workable.com

Current openings : Senior Web Developer, Graphic Designer

:lol:
by hippy
Thu Jul 19, 2018 5:24 pm
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 57
Views: 1744

Re: A new level of seasickness

Looks like a website "for kids, and designed by kids". I guess I'm not their target audience. It reminds me of the Good Old Days, people's first forays into HTML and throwing everything they had discovered into the mix before coming to understand that just because one can doesn't mean one should, th...
by hippy
Thu Jul 19, 2018 1:19 pm
Forum: Troubleshooting
Topic: Send Output to Composite/HDMI At Boot Time
Replies: 9
Views: 197

Re: Send Output to Composite/HDMI At Boot Time

If there can be a signal extracted from either TV which indicates it is active or not you could use that to feed a GPIO pin which allows the Pi to determine which it should be using. Or you could use that signal to cut the 'active' signal or whatever the Pi uses in the HDMI lead. I would start by lo...

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