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by Jim Manley
Sun Dec 27, 2015 3:29 am
Forum: General discussion
Topic: Which is better Heat Sink or Fan?
Replies: 41
Views: 16033

Re: Which is better Heat Sink or Fan?

I thought that in zero gee you needed a fan. You certainly don't have the hot air rises thing going on. One thing in shuttle, if remember this from the MIT lectures on that that I saw, is that there was a lot of noise from the fans. Fans for everything. I think the design of the Astro Pi flight cas...
by Jim Manley
Sat Dec 26, 2015 2:51 am
Forum: General discussion
Topic: Mikrobus Prototyping
Replies: 5
Views: 1972

Re: Mikrobus Prototyping

Hi Keith - MikroBUS is an interesting concept, but when I looked at some of the Click module pages, all of the code examples appear to be written for PIC microcontrollers. Has someone ported these examples to something the Pii can compile or interpret for execution? [Edit] I did find a handful of Pi...
by Jim Manley
Fri Dec 25, 2015 8:49 pm
Forum: General discussion
Topic: Pi Zero with headers
Replies: 50
Views: 10860

Re: Pi Zero with headers

I looked into getting some solderless headers (why? Speed, ease of use, non-permanent....). All sources I could find led back to one company. When I tried to order from them, having to poke them after an unconscionable delay. I was told that they are out of stock and discontinued...which is why non...
by Jim Manley
Fri Dec 25, 2015 8:21 pm
Forum: General discussion
Topic: Remote access to Many Pis
Replies: 2
Views: 645

Re: Remote access to Many Pis

This might be OK for applications while everything is going perfectly, but it doesn't seem to provide anything if something goes wrong on a given Pi that requires physical access after it's become unresponsive (as would be the case for any system). Depending on the problem, even a reboot might not w...
by Jim Manley
Fri Dec 25, 2015 1:59 am
Forum: General discussion
Topic: How about a new game?
Replies: 47
Views: 7521

Re: How about a new game?

Wow Jim, That was quite a rant. I can't figure out if you mean immigrants are a bad thing or it's OK because we are all immigrants anyway. I have no responsibility for what Europe did a long time ago. I was not there. I'm not talking about history I'm talking about now. If the USA has to compare it...
by Jim Manley
Thu Dec 24, 2015 10:50 pm
Forum: General discussion
Topic: How about a new game?
Replies: 47
Views: 7521

Re: How about a new game?

Mod edit: off-topic nationalistic rant deleted.

Please keep on the topic at hand. Politics is not a subject for this forum.
by Jim Manley
Thu Dec 24, 2015 9:27 pm
Forum: General discussion
Topic: How about a new game?
Replies: 47
Views: 7521

Re: How about a new game?

FM and WiFi are old hat. LoRa is the new kid on the block. Tiny little LoRa modules are already available. http://www.microchip.com/pagehandler/en-us/technology/personalareanetworks/technology/lora.html https://www.cooking-hacks.com/documentation/tutorials/extreme-range-lora-sx1272-module-shield-ar...
by Jim Manley
Thu Dec 24, 2015 8:34 pm
Forum: General discussion
Topic: How about a new game?
Replies: 47
Views: 7521

Re: How about a new game?

Note that all posts discussing PI :evil: FM will be deleted here, to keep the innocent safe! (that's why you cannot find any). Its not a "FM" transmitter in any sense, more a [expletive-deleted - this is a family-and-education-friendly forum, you poor excuse for a moderator - _you_ need to be delet...
by Jim Manley
Thu Dec 24, 2015 7:06 pm
Forum: General discussion
Topic: Pi Zero with headers
Replies: 50
Views: 10860

Re: Pi Zero with headers

I complained I had no header soldered onto my Pi Zero until I met the kid who had no Pi Zero, or any other kind of Pi ... C'mon Sony, add some more production lines for the Zero, will ya? This "Bah, Humbug" act is getting old where a fantastic new minimal configuration was introduced just in time fo...
by Jim Manley
Thu Dec 24, 2015 6:46 pm
Forum: General discussion
Topic: Are "HOWTO" posts welcome?
Replies: 14
Views: 1879

Re: Are "HOWTO" posts welcome?

I thought it was a variant on the "South Park" Underwear Gnomes undergarment startup theft ring business plan presentation: Step 1. Steal underwear. Or, plug the WiFi dongle via OTG micro-USB-to-USB-A-female adapter into the Pi Zero data micro-USB port. Step 2. ??? Step 3. Profits!!! Or, install the...
by Jim Manley
Thu Dec 24, 2015 6:16 pm
Forum: General discussion
Topic: 100 RPis Cluster Builld
Replies: 34
Views: 5191

Re: 100 RPis Cluster Builld

I must admit, however, that I am disappointed here, I can't find where I made the supposed error. Perhaps you could indulge me and post a quote of my mistake and its correction. I was just noting that listing yet-another graphics card full of GPU cores may not be addressing the OP's intended use wh...
by Jim Manley
Thu Dec 24, 2015 7:22 am
Forum: General discussion
Topic: 100 RPis Cluster Builld
Replies: 34
Views: 5191

Re: 100 RPis Cluster Builld

This isn't going to solve your hypothetical integer supercomputer problem, but then what can? AMD has tried out having more integer units than floating point ones. I don't think anyone is saying, what about maxing out the number of integer units and leaving everything else out. Or perhaps just havi...
by Jim Manley
Thu Dec 24, 2015 6:45 am
Forum: General discussion
Topic: Raspberry Pi at the Public Library?
Replies: 13
Views: 2866

Re: Raspberry Pi at the Public Library?

In another few months when we can only hope availability will improve, the Pi Zero will be a great option for this sort of scenario, and if keyboards, mice/trackpads, displays, etc., are needed, the community (including Parent Teacher Student Associations) should be canvassed for donated equipment. ...
by Jim Manley
Thu Dec 24, 2015 5:15 am
Forum: General discussion
Topic: 100 RPis Cluster Builld
Replies: 34
Views: 5191

Re: RPi Cluster Builld

mikronauts wrote:And if the problem is not amenable to palletization, the performance will be poor on any cluster/GPU platform.
Yes, I find that problems that won't fit on pallets to be particularly gnarly, and I find auto-"correct" makes things even worse! :lol:
by Jim Manley
Thu Dec 24, 2015 4:56 am
Forum: General discussion
Topic: 100 RPis Cluster Builld
Replies: 34
Views: 5191

Re: 100 RPis Cluster Builld

Indeed, a pair of nVidia Titan cards would blow the socks off 1000 Pis It depends on what you need to do - graphics cards don't just run all on their own, and GPUs have mostly floating-point capable cores that are configured for an optimized graphics processing pipeline where horizontal/vertical/de...
by Jim Manley
Mon Dec 21, 2015 10:49 pm
Forum: General discussion
Topic: Pi Abuse
Replies: 33
Views: 4430

Re: Pi Abuse

I am disturbed ... huh? Wha? Oh, yeah, sorry, I'm that age ... anyway, I am disturbed by the title and content of this thread. Over here in one of the too many Former Colonies, we have the American Society for the Pivention of Cruelty through Amperage, the dreaded ASPCA, well-known for putting video...
by Jim Manley
Mon Dec 21, 2015 10:19 pm
Forum: General discussion
Topic: How to Hack x86 Linux Systems (NOT PII) Just Using Backspace
Replies: 11
Views: 1507

Re: How to Hack Any (x86?) Linux Machine Just Using Backspac

Jim, ...the increased use of 2.4 GHz and Bluetooth wireless keyboards could extend the risk beyond what has traditionally been considered "physical access"... Yes, that I hope is all part of the education youngsters get when messing with the Pi. An awareness of what a computer is and where all the ...
by Jim Manley
Mon Dec 21, 2015 9:19 pm
Forum: General discussion
Topic: How to Hack x86 Linux Systems (NOT PII) Just Using Backspace
Replies: 11
Views: 1507

How to Hack x86 Linux Systems (NOT PII) Just Using Backspace

Very worrying, I don't think I've seen a grub update for raspbian since this was announced ;) I assume you mean an update to a Wild West chuck wagon menu, right? Mmmmmm ... this is making me reeeeeally hungry! Why can I now not get the scene out of my head where the cowboys are sitting around the f...
by Jim Manley
Mon Dec 21, 2015 8:32 pm
Forum: General discussion
Topic: How to Hack x86 Linux Systems (NOT PII) Just Using Backspace
Replies: 11
Views: 1507

How to Hack x86 Linux Systems (NOT PII) Just Using Backspace

I occurred to me that the increased use of 2.4 GHz and Bluetooth wireless keyboards could extend the risk beyond what has traditionally been considered "physical access". We increasingly live in a distributed and wireless world where the "rules" we're used to are continually changing. Another reason...
by Jim Manley
Mon Dec 21, 2015 7:13 pm
Forum: General discussion
Topic: How to Hack x86 Linux Systems (NOT PII) Just Using Backspace
Replies: 11
Views: 1507

How to Hack x86 Linux Systems (NOT PII) Just Using Backspace

I think this only applies to x86-based Linuxen and I haven't had time to track it to ground, but it seemed pretty important to publicize across the Linux world for those who do use it beyond the Pi: http://www.zdnet.com/article/how-to-hack-any-linux-machine-just-using-backspace Note that physical ac...
by Jim Manley
Mon Dec 21, 2015 6:59 pm
Forum: General discussion
Topic: Best age for Pi
Replies: 21
Views: 7774

Re: Best age for Pi

OK, _now_ we have a project! First, for less than $25, you can add a GPS module or use a Bluetooth triangulating scheme (recently in a Foundation blog post at https://www.raspberrypi.org/blog/triangulating-the-office-dog). Then, some software could be developed to pop up a dialog at random minimal i...
by Jim Manley
Fri Dec 18, 2015 7:27 pm
Forum: General discussion
Topic: Best age for Pi
Replies: 21
Views: 7774

Re: Best age for Pi

Also known as "MindCrack" for its ability to mesmerize boys from the ages of 2 to 92 who have ever loved Legos, Lincoln Logs, Erector Sets, Meccano, and the plethora of other hand-eye-coordination-building toys that enable future engineers, scientists, and others of a technical bent to get their gro...
by Jim Manley
Fri Dec 18, 2015 5:55 pm
Forum: Off topic discussion
Topic: My realtime system is more realtime than yours
Replies: 7
Views: 1640

Re: Porting a Windows Program

Jim, If you are going to be pedantic you may as well get it right. GCC does indeed compile to assembler and then assemble that into object files and then link those files: http://codingfreak.blogspot.com/2008/02/compilation-process-in-gcc.html http://cs-fundamentals.com/c-programming/how-to-compile...
by Jim Manley
Thu Dec 17, 2015 8:09 pm
Forum: Off topic discussion
Topic: My realtime system is more realtime than yours
Replies: 7
Views: 1640

My realtime system is more realtime than yours

[Mod Edit: I've split this topic out. Jim is responding to this post. ] Oh, how quickly they forget ... ummm, the now-discontinued Surface RT uses ARM technology and it runs an ARM cross-compiled version of Windows 8 (which may also mean Windows 7 with some help in terms of drivers and other low-le...
by Jim Manley
Thu Dec 17, 2015 7:33 pm
Forum: General discussion
Topic: Pi Zero £4 - how long can the A+ stay at £18 ???
Replies: 38
Views: 5574

Re: Pi Zero £4 - how long can the A+ stay at £18 ???

Yes because of better production at the Fab Plant, but from the various posts made especially by JM one would think Voodoo at play... The Fab Plant have stepped up to produce a better quality product, and with the better design of the A+/B+ power mangement have allowed this combination to be carrie...

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