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by pishboy
Wed Apr 25, 2012 4:59 am
Forum: Other projects
Topic: Cluster (Bramble...) Design Discussion (Advanced)
Replies: 170
Views: 84462

Re: Cluster (Bramble...) Design Discussion (Advanced)

<t>willanth said: <br/> <br/> <br/> Hi All, just been reading this discussion and had some suggestions..<br/> <br/> I'm new to HPC and to linux administration in general.  I'm a hardware guy mostly.<br/> <br/> I wanted to address the question of a power supply for a "bramble" cluster of b-pi.. my su...
by pishboy
Fri Apr 20, 2012 12:33 pm
Forum: Other projects
Topic: 24/7 Minecraft Server?
Replies: 5
Views: 2967

Re: 24/7 Minecraft Server?

you forgot minecraft classic
it's a little less intensive, and it's free!
by pishboy
Mon Apr 16, 2012 8:43 am
Forum: Beginners
Topic: General Purpose Input and Output
Replies: 11
Views: 5167

Re: General Purpose Input and Output

<t>mahjongg said: <br/> <br/> <br/> for example by connecting a switch to a GPIO input pin, closing this switch so it shorts the pin to ground, then accidentally programming said GPIO pin as output and trying to output a '1'.<br/> <br/> <br/> oh, i thought you can fry a raspi by just sending out the...
by pishboy
Mon Apr 16, 2012 7:19 am
Forum: Beginners
Topic: General Purpose Input and Output
Replies: 11
Views: 5167

Re: General Purpose Input and Output

<t>Vindicator said: <br/> <br/> <br/> Be very careful as the GPIO on the Raspi are not buffered and you might fry your Raspi with the wrong information.<br/> <br/> Remember this is a beginners forum and there are more advanced threads with good information in them.<br/> <br/> <br/> how can you can f...
by pishboy
Sun Apr 15, 2012 3:45 pm
Forum: Beginners
Topic: General Purpose Input and Output
Replies: 11
Views: 5167

Re: General Purpose Input and Output

<t>maybe someone can code a library and/or an API to help bridge the gap between java and the shell<br/> A crude one could be several scripts that each do a particular function (like pulsing this, etc.) then launch that using java<br/> or maybe running a C++ executable? then maybe (not sure) you can...
by pishboy
Thu Mar 22, 2012 7:44 am
Forum: Automation, sensing and robotics
Topic: Raspi-powered seismometer/seismograph
Replies: 63
Views: 39165

Re: Raspi-powered seismometer/seismograph

i'll wait until an earthquake rolls by
That waiting period can be anywhere from 1 month up to a few years
by pishboy
Wed Mar 21, 2012 2:48 pm
Forum: Automation, sensing and robotics
Topic: Raspi-powered seismometer/seismograph
Replies: 63
Views: 39165

Re: Raspi-powered seismometer/seismograph

<t>OK, so i'm having some calibration issues with my big lehman seismometer. Also, i think it would be hard to interface it and give me usable data :/<br/> <br/> I'm thinking, is it possible to hook up an accelerometer to the GPIO? I mean, I don't need 3 space-consuming units to check for the X, Y a...
by pishboy
Fri Mar 09, 2012 7:29 am
Forum: Automation, sensing and robotics
Topic: Raspi-powered seismometer/seismograph
Replies: 63
Views: 39165

Re: Raspi-powered seismometer/seismograph

<t>winwaed said: <br/> <br/> <br/> If I was to build something, I would also probably want to try and build a three-component seismometer. However, a single vertical component (as you're describing) would probably be ideal for a school project. Keep it simple,etc.<br/> <br/> <br/> <br/> I'm actually...
by pishboy
Wed Mar 07, 2012 9:13 am
Forum: Automation, sensing and robotics
Topic: Raspi-powered seismometer/seismograph
Replies: 63
Views: 39165

Re: Raspi-powered seismometer/seismograph

<t>so far as my researched data goes, I don't really need 100k samples/s because a seismic wave detected by this wouldn't really reach more than 100Hz.  The 10 bits might be a little problematic though, but i think i can get over it. are there any pin-compatible ADC chips out there that are a bit mo...
by pishboy
Tue Mar 06, 2012 3:08 pm
Forum: Automation, sensing and robotics
Topic: Raspi-powered seismometer/seismograph
Replies: 63
Views: 39165

Re: Raspi-powered seismometer/seismograph

<r>I have been thinking of creating a seismograph for some time now, but studies blocked my way and the project was put on hold.<br/> <br/> Now that it's almost summer, i'm thinking of making it as a summer project and bringing it back to life.<br/> <br/> I'm thinking of creating a Lehman seismograp...
by pishboy
Thu Jan 05, 2012 9:09 am
Forum: General discussion
Topic: How much sales do you think will raspi make?
Replies: 66
Views: 11633

Re: How much sales do you think will raspi make?

<t>DeliciousRaspberryCake said:<br/> <br/> <br/> Considering the amount of haggling the Raspberry Pi foundation had to do with their component suppliers, PCB servicing and with Broadcom itself, I honestly doubt there'll be anyone on this planet that can produce a raspberry pi for less than $25 and s...
by pishboy
Mon Jan 02, 2012 6:46 pm
Forum: General discussion
Topic: How much sales do you think will raspi make?
Replies: 66
Views: 11633

Re: How much sales do you think will raspi make?

<r>SwampPuppet said: <br/> <br/> <br/> Google "Raspberry Pi". 2,200,000 results.<br/> <br/> The forum has almost 7,000 members. I'll bet the mailing list is way longer.<br/> <br/> Imagine the launch of the first iPhone, the first ZX Spectrum, the first Skybox.<br/> <br/> Then consider if Apple had o...
by pishboy
Mon Jan 02, 2012 6:11 pm
Forum: Other projects
Topic: Raspberrypi Quadcopter?
Replies: 11
Views: 6935

Re: Raspberrypi Quadcopter?

<t>an arduino type shield might not be a good candidate for this; the GPIO pins are only on 1 side and wouldn't be sturdy enough. Maybe nylon spacers could be used for the shield.<br/> <br/> yep, the gertboard is overkill. There is an I2C line for the sensors and the rest of the GPIO pins for the ou...
by pishboy
Mon Jan 02, 2012 4:30 pm
Forum: General discussion
Topic: How much sales do you think will raspi make?
Replies: 66
Views: 11633

Re: How much sales do you think will raspi make?

<t>I'm expecting +15000 in the first month and also the shop server not being able to cope with the traffic<br/> <br/> I'm expecting i wont be able to buy the first batch of boards BUT i do hope i can be able to buy ASAP. I know someone in the UK who could bring it for me here, would save on customs...
by pishboy
Mon Jan 02, 2012 4:01 pm
Forum: Other projects
Topic: Audible Tech-Support Monitor
Replies: 3
Views: 1335

Re: Audible Tech-Support Monitor

Gert said:


I am curious how many mega watts the Raspberry-Pi will save in the coming years with lots of user swapping big power hungry boxes for a tiny Pi.


Who knows, maybe tech companies would use the RPi in an effort to be "green"
by pishboy
Sun Jan 01, 2012 2:46 pm
Forum: Other projects
Topic: Cluster (Bramble...) Design Discussion (Advanced)
Replies: 170
Views: 84462

Re: Cluster (Bramble...) Design Discussion (Advanced)

<t>I have an idea: The bramble can be mounted on a rack-style case because all you need to have access to is the front and rear, the sides can be used for troubleshooting and testing<br/> <br/> and 40mm fans attached to the side can be used to cool it if you are planning to run it for weeks on end<b...
by pishboy
Sun Jan 01, 2012 1:51 pm
Forum: Other projects
Topic: Cluster (Bramble...) Design Discussion (Advanced)
Replies: 170
Views: 84462

Re: Cluster (Bramble...) Design Discussion (Advanced)

<t>JamesH said: <br/> <br/> <br/> Distributed compilation would a good thing to try to start with. Would teach you quite a bit of scripting, ethernet etc.<br/> <br/> <br/> Exactly what i intend doing with bramble<br/> <br/> Just a tip: Stop thinking of having raspi for kids who don't have access to ...
by pishboy
Sun Jan 01, 2012 1:07 pm
Forum: Other projects
Topic: Cluster (Bramble...) Design Discussion (Advanced)
Replies: 170
Views: 84462

Re: Cluster (Bramble...) Design Discussion (Advanced)

Just realized what a raspi cluster can be used for

A few years ago i have tried compiling WRF but the models ran too slow on a 1GHz pc of mine. Maybe a mini raspi cluster with 5 units could do the trick
by pishboy
Sun Jan 01, 2012 12:27 pm
Forum: Other projects
Topic: Cluster (Bramble...) Design Discussion (Advanced)
Replies: 170
Views: 84462

Re: Cluster (Bramble...) Design Discussion (Advanced)

Once i get a Raspi board i'll probably try to join in one of the contests (mentioned by Liz in another forum thread) and if i ever win a cash prize (once again, mentioned by Liz) i'd buy more raspis
And try to make my own bramble

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