Search found 177 matches

by Pinky's Brain
Sat Feb 04, 2012 1:55 pm UTC
Forum: Hardware
Topic: Unconventional ramdisk setups
Replies: 10
Views: 5890

Re: Unconventional ramdisk setups

I have thought about this ... there are basically two options, Infiniband and SAS with SCST. You can buy controllers for both at pretty reasonable prices. The problem is getting the latency down low enough to beat a good SSD on read performance to make it worth it, SSDs are getting pretty good ... S...
by Pinky's Brain
Wed Jan 11, 2012 7:42 pm UTC
Forum: Hardware
Topic: Could one build his own handheld console?
Replies: 13
Views: 4240

Re: Could one build his own handheld console?

Take a second hand rootable android smartphone capable of running the emulator you want to run, a USB gamepad supported in that emulator ... take a hacksaw to the gamepad without destroying the electronics and put it all in a larger case with a larger battery?
by Pinky's Brain
Sun Aug 21, 2011 8:13 pm UTC
Forum: Hardware
Topic: Recommend an Android Phone
Replies: 16
Views: 2940

Re: Recommend an Android Phone

Galaxy S2 has a dual core just for instance ... as for what could make use of it, dunno.

As for phone/plan costs ... not always possible to separate them, have to simply look for the best composite deal.
by Pinky's Brain
Sun Aug 21, 2011 10:19 am UTC
Forum: Hardware
Topic: Recommend an Android Phone
Replies: 16
Views: 2940

Re: Recommend an Android Phone

How cost sensitive are you? I have just gotten a LG Optimus Black on a pretty great deal for my area (20 Euro a month, no added cost for the phone, 2 year contract, 225 minute and 1 GB internet soft capped internet with 64 KB/s connection after the cap without extra costs). I can't unequivocally rec...
by Pinky's Brain
Fri Apr 29, 2011 6:56 pm UTC
Forum: Hardware
Topic: hardware recommendations
Replies: 21
Views: 4350

Re: hardware recommendations

Throwing a FPGA at something like this is overkill ... something like a PIC32 ethernet starter kit should be able to handle it, network/USB connectivity is much easier this way than with a FPGA and you get integrated A/D converter for sensors to boot. Just needs some drivers to convert the general I...
by Pinky's Brain
Sat Apr 02, 2011 4:09 pm UTC
Forum: Hardware
Topic: I want to track my stuff
Replies: 8
Views: 1981

Re: I want to track my stuff

It's going to take a decent size lithium button cell to keep something like this operating for long, and even then range would be in 10s of meters at best, don't think you'd get something small enough to easily hide in clothing. EDIT : Actually on second thought, you could just make something which ...
by Pinky's Brain
Mon Feb 14, 2011 2:27 pm UTC
Forum: Hardware
Topic: The King of Scientific Calculators
Replies: 10
Views: 4018

Re: The King of Scientific Calculators

Oops missed the bit about not including graphic calculators (was going to suggest FX-9860G slim, it will fit in your pocket).

PS. the Wolfram iPhone app goes for 50$.
by Pinky's Brain
Fri Feb 04, 2011 1:45 pm UTC
Forum: Hardware
Topic: Upgrading my mouse
Replies: 14
Views: 2488

Re: Upgrading my mouse

Try them out in the shop ... Personally I haven't found a many buttoned mouse yet for which I could easily reach all the buttons and for which all the buttons were mappable like the Habu. The size of the Habu and the ability to put the buttons forward a bit on the side helps a lot with reachability,...
by Pinky's Brain
Fri Feb 04, 2011 1:35 pm UTC
Forum: Hardware
Topic: Why is my internet so slow?
Replies: 15
Views: 2737

Re: Why is my internet so slow?

Just connect a computer/laptop directly to the modem with an ethernet cable to test the speed ...

They will probably ask you to do this too (mostly because it makes sense and it's relatively easy).
by Pinky's Brain
Fri Feb 04, 2011 1:22 pm UTC
Forum: Hardware
Topic: Trusty HDD Recommendation!
Replies: 46
Views: 4544

Re: Trusty HDD Recommendation!

Every manufacturer seems to have it's bad series really ... Personally I just decide at the moment of purchase based on the latest reviews and newegg customer reports. A couple of years ago that led me to Samsung, last year it led me to Hitachi. Seagates problems wouldn't necessarily turn me off the...
by Pinky's Brain
Thu Jan 27, 2011 2:03 pm UTC
Forum: Hardware
Topic: NOT Baking Eggs. (Incubator design-PWM question)
Replies: 9
Views: 4710

Re: NOT Baking Eggs. (Incubator design-PWM question)

You will still need to take into account lag time or you will still not get a stable temperature.

http://en.wikipedia.org/wiki/PID_controller

Also since you're using AC you will want to use a triac rather than PWM.
by Pinky's Brain
Sat Jul 24, 2010 9:00 pm UTC
Forum: Hardware
Topic: will ARM oust the x86?
Replies: 28
Views: 5276

Re: will ARM oust the x86?

Atom has been a bit lackluster ... mostly because of chipsets rather than the core, but Moorestown seems to finally fix things. Also there is a lot of trouble brewing on the process front ... Intel has some unique advantages at the lower nodes, they have most experience with multi-patterning and the...
by Pinky's Brain
Wed Jun 23, 2010 8:09 pm UTC
Forum: Hardware
Topic: iPad discussion
Replies: 72
Views: 11033

Re: iPad discussion

I meant the Sony one being talked about which could run windows.
by Pinky's Brain
Wed Jun 23, 2010 7:00 am UTC
Forum: Hardware
Topic: iPad discussion
Replies: 72
Views: 11033

Re: iPad discussion

Probably using Moorestown, which is a very impressive chipset ... but with touch screen controls I don't really care that much about the hardware. It's after all only useful for a very limited set of tasks (for most people). An around the house e-reader, web-browser and media-player ... that's what ...
by Pinky's Brain
Tue Jun 22, 2010 8:12 pm UTC
Forum: Hardware
Topic: iPad discussion
Replies: 72
Views: 11033

Re: iPad discussion

Samsung Galaxy Tape will be the first real competition display wise.
by Pinky's Brain
Fri Jun 18, 2010 11:58 am UTC
Forum: Hardware
Topic: Mount monitor to wall without drilling?
Replies: 10
Views: 9353

Re: Mount monitor to wall without drilling?

You could put a board with a LCD wall mount against the wall with those 3M adhesives or a couple dozen Tesa Power Strips. It's a bit risky though. Can't you just use a pedestal? Something like this :

http://www.mountsandmore.com/Peerless-L ... E0310.html
by Pinky's Brain
Sat Jun 12, 2010 11:28 pm UTC
Forum: Hardware
Topic: simple audio amp
Replies: 7
Views: 1367

Re: simple audio amp

You can build your own boost converter, but it's not entirely trivial. You can also buy Mean Well DC DC modules pretty cheaply (either the 24 one or the 12 volt one, the output is galvanically isolated, so you can just use the 12 volt one on top of the original 12 volt).
by Pinky's Brain
Thu Jun 10, 2010 10:18 am UTC
Forum: Hardware
Topic: simple audio amp
Replies: 7
Views: 1367

Re: simple audio amp

Look for digital amplifier ICs ...

Or you can simply buy a module like this :

http://www.parts-express.com/pe/showdet ... e=googleps
by Pinky's Brain
Sun May 30, 2010 7:30 am UTC
Forum: Computer Science
Topic: Help with Neural Networks
Replies: 12
Views: 3997

Re: Help with Neural Networks

I have run into some algorithms for determining good MLP configurations for a given training set without just doing a huge search ... Only one which comes to mind is "Neural network design using Voronoi diagrams". Pretty old, so if you follow citations you can probably find other algorithm...
by Pinky's Brain
Wed May 26, 2010 1:34 am UTC
Forum: Hardware
Topic: Modifying a remote control car...
Replies: 4
Views: 1852

Re: Modifying a remote control car...

Those modules in the image are 433 MHz transmitter and receiver modules, dirt cheap ... you can get RCT-433-ASBR + RCR-433-MPR for less than 10$.
by Pinky's Brain
Mon May 24, 2010 12:51 pm UTC
Forum: Hardware
Topic: 3D printer thread!
Replies: 14
Views: 2305

Re: 3D printer thread!

Printable electronics is an interesting endeavour, but it wouldn't really let the 3D printer build itself (and even if the reprap could do it, it wouldn't be very good at it ... inkjet is much more suitable). A resistor might be structurally a little more complex than a threaded metal rod but in the...
by Pinky's Brain
Tue May 18, 2010 10:51 pm UTC
Forum: Hardware
Topic: RESOLVED yet another laptop search thread
Replies: 5
Views: 1163

Re: yet another laptop search thread

I'd get something with a HD5650, significantly faster than the GT330M you would see in similarly priced notebooks with NVIDIA. Both Acer and Sony have some in your price range (over here in Euro land HP has some nice Phenom based laptops with it as well). http://www.newegg.com/Product/ProductList.as...
by Pinky's Brain
Thu May 13, 2010 8:54 pm UTC
Forum: Hardware
Topic: brainstorming a home entertainment system configuration
Replies: 22
Views: 2585

Re: brainstorming a home entertainment system configuration

You can do everything with component ... 4x4 matrix switches don't seem cheap either though.

The cheap 4x4 HDMI matrix is a bit hit and miss in usage :
http://www.avsforum.com/avs-vb/showthread.php?t=1193041
http://www.avsforum.com/avs-vb/showthread.php?t=1167039
by Pinky's Brain
Thu May 13, 2010 8:01 pm UTC
Forum: Hardware
Topic: EE Project Help
Replies: 16
Views: 3556

Re: EE Project Help

AFAICS you want a DAC instead of a programmable resistor here (if it's still an option you might want to pick a microcontroller with an integrated one, the DSP one is a bit of a strange pick for this kind of application).
by Pinky's Brain
Thu May 13, 2010 11:04 am UTC
Forum: Hardware
Topic: brainstorming a home entertainment system configuration
Replies: 22
Views: 2585

Re: brainstorming a home entertainment system configuration

The problem with HDMI is that it's partially bidirectional ... so a matrix is pretty complex.

Any way so you are looking at needing a 4x4 matrix, that's 350$ and up.
by Pinky's Brain
Wed May 12, 2010 10:35 am UTC
Forum: Hardware
Topic: 3D printer thread!
Replies: 14
Views: 2305

Re: 3D printer thread!

Why do you need an excuse? Significant other? :)
by Pinky's Brain
Sat May 08, 2010 5:23 am UTC
Forum: Hardware
Topic: brainstorming a home entertainment system configuration
Replies: 22
Views: 2585

Re: brainstorming a home entertainment system configuration

For the HTPC be sure to get something which can route audio over HDMI ... then just get a HDMI matrix switcher, you can get one for under 100$ (although the cheapest get bad reviews regarding switching time).
by Pinky's Brain
Thu May 06, 2010 2:29 pm UTC
Forum: Hardware
Topic: iPad discussion
Replies: 72
Views: 11033

Re: iPad discussion

stephentyrone wrote:
MarsTeapot wrote:*Would require a good screen, not sure how good the color reproducion on an ipad is.


Much better than most laptops. It's a rather nice IPS panel.

Reproduction is a bit of a misnomer ... where IPS excels is it's colour stability across angles (just splitting hairs, I know).
by Pinky's Brain
Mon May 03, 2010 1:45 pm UTC
Forum: Hardware
Topic: Want a new tower. What mainboard?
Replies: 8
Views: 1539

Re: Want a new tower. What mainboard?

It's hard to judge just from anecdotes, but I've read enough forum posts of PSUs taking down the computer when they die that I would go for quality myself (which doesn't necessarily mean expensive, but unless I can find a nice review with pics of the internals I wouldn't get a cheap PSU). Instabilit...
by Pinky's Brain
Mon Apr 26, 2010 4:10 pm UTC
Forum: Hardware
Topic: arm cpu
Replies: 9
Views: 2151

Re: arm cpu

Yep, that's the one ... the processor boards come separately, and are extremely spartan, you would want the LPC2106 presumably : http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=2621773&k=lpc2106 PS. scratch this one, also no 64 bit drivers for the programmer : http://www.teamfdi.com/for...
by Pinky's Brain
Sat Apr 24, 2010 3:47 pm UTC
Forum: Hardware
Topic: arm cpu
Replies: 9
Views: 2151

Re: arm cpu

Last time I looked I liked the price of the Future Designs USB dongle kits and the TI Stellaris kits (for what you get at any rate, if the ethernet and display are useless to you then it's of course not so cheap).
by Pinky's Brain
Sun Apr 04, 2010 12:23 pm UTC
Forum: Hardware
Topic: RPN Graphing Calculator
Replies: 8
Views: 6162

Re: RPN Graphing Calculator

The fx-9860g slim looks pretty sweet for the price, I had an older casio clamshell and always enjoyed the form factor.

No built in CAS or RPN, but there are of course user programmed versions of both (it can be programmed in C with the official SDK plus revolution-fx).
by Pinky's Brain
Mon Mar 22, 2010 6:10 am UTC
Forum: Hardware
Topic: ECL Logic
Replies: 4
Views: 1643

Re: ECL Logic

Same reason not many of us use class A amplifiers, kinda nasty for power consumption. Unless you really need to do RF frequency discrete logic it's best avoided (personally I would have to hit a book merely to lay out a PCB for a 200+ MHz bandwidth signal). PS. You only really need the programmable ...
by Pinky's Brain
Sat Mar 20, 2010 4:36 pm UTC
Forum: Hardware
Topic: LCD monitors: crappy, expensive, big, etc
Replies: 37
Views: 7702

Re: LCD monitors: crappy, expensive, big, etc

Now, displays are measured in "Grey-to-Grey" response time. I have decided that for my purposes, I will derate all "Grey-to-Grey" by a factor of 10. I arrived at this by using the exponential decay function used to approximate Resistor-Capacitor circuits. They started giving gre...
by Pinky's Brain
Fri Mar 19, 2010 7:06 pm UTC
Forum: Hardware
Topic: ECL Logic
Replies: 4
Views: 1643

Re: ECL Logic

Looking for ECL and in-stock on Digi-Key finds plenty.

No monostable ... but there's flip flops, logic gates and programmable delay lines ... so everything you need.
by Pinky's Brain
Sun Mar 07, 2010 1:37 pm UTC
Forum: Hardware
Topic: batteries, transformers, and a DC motor
Replies: 10
Views: 2268

Re: batteries, transformers, and a DC motor

You want the diode in parallel with the motor ... which will only happen with an internal diode in a dual MOSFET setup, in which the second MOSFET short circuits the diode to minimize losses (you still need the diode, because you have to be a bit conservative with switching to prevent glitches). A g...
by Pinky's Brain
Sat Mar 06, 2010 11:22 pm UTC
Forum: Hardware
Topic: batteries, transformers, and a DC motor
Replies: 10
Views: 2268

Re: batteries, transformers, and a DC motor

Many power MOSFETs have a flyby diode built-in. That is one reason I went for relays for a project involving 3 power sources. Hmm, didn't know that ... but that's only really relevant if you go for a two MOSFET setup ... which if I was designing a quick circuit of my own I'd be hesitant to do, have...
by Pinky's Brain
Thu Mar 04, 2010 8:57 am UTC
Forum: Hardware
Topic: batteries, transformers, and a DC motor
Replies: 10
Views: 2268

Re: batteries, transformers, and a DC motor

Looking around Ni-MH and Li-Ion would cost you closer to 400 bucks for that kind of capacity (less than half the weight though). Seems easier to just get 4 12 volt batteries and forget about the boost converter, doesn't seem to cost much more than the big 12 volt battery you linked. Then you just ne...
by Pinky's Brain
Wed Feb 17, 2010 6:47 pm UTC
Forum: Hardware
Topic: Software RAID and chipsets
Replies: 25
Views: 3246

Re: Software RAID and chipsets

That's assuming uncorrelated BER ... the problem is bad batches and that the people with the amount of data necessary to estimate the frequency and severity of bad batches aren't talking.
by Pinky's Brain
Wed Feb 17, 2010 12:36 am UTC
Forum: Hardware
Topic: Software RAID and chipsets
Replies: 25
Views: 3246

Re: Software RAID and chipsets

The only hardware raid that counts is one with a battery backup module (or with some of the new ones a flash journal). Otherwise you might as well use software RAID (at least with Linux, don't think you can do RAID-10 with windows dynamic disks ... only RAID 1/5). PS. the odds of a second disk faili...

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