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 Forum index » Advanced Topics » Puppy Projects
Puppy webserver - LOW POWER CONSUMPTION
Moderators: Flash, JohnMurga
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Q5sys


Joined: 11 Dec 2008
Posts: 1073

PostPosted: Mon 16 Dec 2013, 11:31    Post_subject:  

greengeek wrote:
Interesting. Thanks Q5. I don't have a Pi yet - I was going to get one last year then I saw all the power problems people were having so I shelved the idea. It does look like a suitable piece of hardware for this sort of low power application though, assuming I can get one of the later versions.

Have you measured the current draw while your Pi is running the server image?


Power to the Pi works over USB. Power specs are 300 mA for the Model A, and 700 mA for the Model B. The Model B maxes out at 1A, so you're looking at a peak draw of 5w.

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greengeek

Joined: 20 Jul 2010
Posts: 2665
Location: New Zealand

PostPosted: Tue 17 Dec 2013, 01:40    Post_subject:  

Thanks. I've now updated my first post to reflect Raspberry Model B as my current hware preference. (open to change of course, but we'll see what comes on the market...)
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greengeek

Joined: 20 Jul 2010
Posts: 2665
Location: New Zealand

PostPosted: Wed 18 Dec 2013, 13:00    Post_subject:  

Just throwing another idea into the mix for longer term consideration - I wonder if an ARM based tablet might one day be possible to use as a portable webserver?

Ted Dog - how capable is that Mele you mentioned? Does it have both wired and wireless network capability?

Are there any reasons why an ARM based server would be a bad solution?
.
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greengeek

Joined: 20 Jul 2010
Posts: 2665
Location: New Zealand

PostPosted: Wed 08 Jan 2014, 18:20    Post_subject:  

Added Odroid to my first post as another hardware possibility:
http://hardkernel.com/main/products/prdt_info.php
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Ted Dog


Joined: 13 Sep 2005
Posts: 2469
Location: Heart of Texas

PostPosted: Wed 08 Jan 2014, 18:41    Post_subject:  

missed reply sorry yes both wired and wireless. three different video out rca vga and hdmi if needed. the new one you added is the one version3 when available without paypal only option.
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greengeek

Joined: 20 Jul 2010
Posts: 2665
Location: New Zealand

PostPosted: Sat 27 Sep 2014, 15:54    Post_subject:  

Added note to page 1 first post to highlight server risks from openssl (heartbleed) and bash (shellshock) issues.
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starhawk

Joined: 22 Nov 2010
Posts: 3128
Location: Everybody knows this is nowhere...

PostPosted: Sat 27 Sep 2014, 17:25    Post_subject:  

Avoid the (now somewhat rarer, thankfully) CX-01 "cloud stick" -- you can't Linux it, it just bricks. Had one a while ago, found out I couldn't Linux it (thankfully not firsthand) and sold it to someone else as a direct result.

Those are the older ones with ~4gb ROM and no MicroSD slot... looks like this --> http://i.imgur.com/wfqXjhi.jpg

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Q5sys


Joined: 11 Dec 2008
Posts: 1073

PostPosted: Sun 28 Sep 2014, 11:17    Post_subject:  

greengeek wrote:
Just throwing another idea into the mix for longer term consideration - I wonder if an ARM based tablet might one day be possible to use as a portable webserver?

Ted Dog - how capable is that Mele you mentioned? Does it have both wired and wireless network capability?

Are there any reasons why an ARM based server would be a bad solution?
.


Until ARM gets it act together... they simply cant handle the load as well. Maybe in another 5~10 years they'll be better, but right now they dont work as well. I'm curious what the ARM 64bit chips will do once they work out the kinks.

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scsijon

Joined: 23 May 2007
Posts: 1047
Location: the australian mallee

PostPosted: Tue 30 Sep 2014, 03:58    Post_subject:  

greengeek wrote:
Yes, thats the type of power adapter I've got. Cost me $50 in NZ a couple of years ago - just couldn't find a mini itx mobo for less than $100 and it seemed rather steep at that price so I went no further at the time.

[EDIT :] Just dragged out my previous attempt at a standalone solar powered PC. I seem to recall the main problems (other than the 4Amp draw of the screen...) were the mobo needed too much current and I couldn't find an easy way to make it self-boot after power loss.

Ted Dog - do you think all Mele's do what yours was doing with the auto reboot or did you have a special setup?


Self booting after power loss for most is usually a link (there but not pinned and linked) on the motherboard if it's not available in the bios. Check your bios for a revision upgrade from it's suppliers website before playing with the mb first though.

Most switching supplies can be 'set' to slowstart internally, stops that nasty drag when starting up, have a hunt on the web in the swiching supplies repair threads, or pm me and i'll see if i can find the change to do as it's only a capacitor added across a resistor (or vice versa) somewhere in the startup circuit. Also a lot of AC switching supplies can be run from down to 72V DC so if your solar system is 48v, a voltage doubler circuit is all you need to add in most cases.

As far as backlit screens are concerned, if you carefully open the screen, the backlit unit is athin tube usually at the bottom. If you don't need full bright and you have one that needs button control and not a potentiometer, you can add that.

Had something else to add, but forgotten what so ending here.

have fun.

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