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331  Forum 2005-2010 (read only) / Bar Sport / Re: Circuit Design Aesthetics on: February 19, 2009, 07:09:41 pm
macegr, apparently, you kind some slick new PCBs ^^


I especially like the octobrite
http://flickr.com/photos/macetech/

332  Forum 2005-2010 (read only) / Bar Sport / Re: Circuit Design Aesthetics on: February 15, 2009, 04:48:24 am
follower : from your blog post about ponoko unboxing, I can say that you can build some pretty black shiny enclosure with laser cut acrylic ^^
But unless you're a pro at bending plastic without destroying it, it will always be some kind of rectangular box...
333  Forum 2005-2010 (read only) / Bar Sport / Re: Circuit Design Aesthetics on: February 14, 2009, 10:20:04 pm
Damn ! Awesome !

Just a though

Don't know why (maybe the colors) when I saw this picture, I immediately thought that maybe I should someday design a PCB that would look like a satellite view of some town.


If you ever watched the google maps image of washington over the capitole, the geometric patterns are beautiful.
http://maps.google.fr/maps?f=q&source=s_q&hl=fr&geocode=&q=washington+capitole&sll=51.426614,2.988281&sspn=21.183957,39.550781&ie=UTF8&ll=38.890398,-77.00562&spn=0.025754,0.054932&t=k&z=15


What I like on this one is the way he used the RGB led pins to make a support for the ping pong ball

http://tinkerlog.com/2008/07/27/synchronizing-fireflies-ng/

Form & function ^^

http://www.botanicalls.com/

Simple, but I like the colors copper / blue

http://web.media.mit.edu/~silver/drawdio/

334  Forum 2005-2010 (read only) / Bar Sport / Re: Circuit Design Aesthetics on: February 12, 2009, 02:06:47 pm
Thanks everyone for all the infos, keep posting the beautiful PCBs (and enclosures) ^^

Now for the fun stuff (even if you certainly already saw it):

http://www.evilmadscientist.com/article.php/mobiuscircuit


http://deryke.blogspot.com/2009/01/ch3ck-th1s-0ut.html
335  Forum 2005-2010 (read only) / Bar Sport / Re: Circuit Design Aesthetics on: January 28, 2009, 04:25:58 pm

http://www.flickr.com/photos/svofski/3145837238/

Don't really understand what this is

http://www.flickr.com/photos/americalinx-company/2207848066/
336  Forum 2005-2010 (read only) / Bar Sport / Re: Circuit Design Aesthetics on: January 28, 2009, 04:14:53 pm
Found It !



http://www.sparkfun.com/commerce/advanced_search_result.php?keywords=flame+kit&x=0&y=0&search_section=products
337  Forum 2005-2010 (read only) / Bar Sport / Re: Circuit Design Aesthetics on: January 28, 2009, 04:06:39 pm
Nice Chip !

TAOS TSL230R Light Intensity to Frequency IC
http://www.sparkfun.com/commerce/product_info.php?products_id=8940
338  Forum 2005-2010 (read only) / Bar Sport / Circuit Design Aesthetics on: January 28, 2009, 03:44:23 pm
Hi There
I guess everyone already saw the gorgeous Illuminato board made by inthebitz.


He talked about a guy named Chris Ladden, but I can't find any reference to his work.

Maybe you saw the boards shaped like lightnings made by sparkfun for a workshop they had at an old old Maker Faire ? Can't find the picture.

There's this translucent PCB that I like too :


And of course, the Lilypad :


What I'm looking for is any ressource about PCB visual design and such.
Even only inspirationnal pictures ^^

Go on and post !
339  Forum 2005-2010 (read only) / Bar Sport / Re: VGA Signal Fading on: March 11, 2009, 10:49:26 am
I don't think that the sync signal on green channel is the cause, because I can turn the pot fully off on the green channel and still get in sync. In fact I can do it with any channel, if I let at least one fully open.

Does the pot influence on the impedance is still valid if it is fully open(zero ohms resistance) ? I want to be able to fade video out only if there's a computer crash, like a emergency button, so ghosting is not a problem for me.

I'm gonna try it again tonight without the scan converter.
340  Forum 2005-2010 (read only) / Bar Sport / VGA Signal Fading on: March 10, 2009, 03:52:25 pm
Hahoy there

I have a bit of a problem here. I just finished soldering a really simple VGA signal fader, to be able to fade a VGA signal to black without losing sync signals and having the beamer or screen telling "cable unplugged". Every cable is directly wired from the IN connector to the OUT connector, except the 3 lines for R, G and B signals going through potentiometers.

I have a pb though. RGB signals (pin 1, 2 and 3 respectively) are just analog lines varying from 0V to 0.7V in theory. With my voltmeter on the vga output of my macbook, if I send a full red image to the second screen, I get 0.5V on the red line, and 0.01V if I send full black. The problem comes when I wire the potentiometers for fading the 3 colors.

When the pot is fully open, I still have 0.5V, but when it's closed, I have 0.10V (ten times more). My pots are 1k linears. Ok, with 0.10V on the red line, I don't see any red color on the screen, so this is not a big deal. But when I turn the other pots, something strange happens.

In fact, I can turn 2 pots completely off, but as soon as I touch the third, the sync signal is lost... :/ The wiring is really simple : Pin 1 to the ground, pin 2 to the output signal, pin 3 to the input signal. I tried adding 1N4148 diodes on the input signal, but strangely it never works when they are plugged (computer don't even recognize there's a second screen plugged). I also tried without wiring the Pin 1 to ground. Whatever pot I turn last (R, G or B), I get the same behavior. I does the same thing when I turn the 3 pots approximately 3/4 of the course. It's like it's flipping off when there's too much resistance on the signal lines.

I checked checked checked the soldering job and stuff, nothing innapropriate.

One precision : as I have only 1 VGA cable, I used it to plug the computer to the fader, and the VGA output goes to a TV using a scan converter like this one.

GrandTec Grand Hand View
http://www.grand.com.tw/pctv_handview.html

If anyone have an idea, please, tell me quick ^^

Cheers (and sorry for the long post)
341  Forum 2005-2010 (read only) / Bar Sport / DIY Electro-Stimulation on: February 20, 2009, 04:18:01 am
Howdy there
Does anyone knows what are the specs (Voltage, Intensity, Pulse length, ...) for stimulation of a muscle, like with those crappy QVC-stamped electro-stimulator ?
I just got a bunch of electrodes for ECG, those may not be the right kind of electrodes, but I'd like to test electrostimulation.

The only things I found are something called Weiss Law :
I = Rh(Cr/(t+1))
Where Rh = Rhéobase et Cr = Cronaxie (french PDF).
Didn't go farther with that.
I'm browsing a forum about sexual electro stimulation, see if I can gain some infos.

Cheers
342  Forum 2005-2010 (read only) / Bar Sport / Re: Good international electronics shops? on: January 06, 2009, 10:16:58 pm
I like to shop on Futurlec
http://www.futurlec.com/
It's one of the rare shop that can provide some "rare" parts, SMD parts (including caps & res) and ship for as low as 4$, even to Europe.... And they have a small 8x8 led matrix, with "square LEDs"... Nice ^^
343  Forum 2005-2010 (read only) / Bar Sport / Re: What should I get while in China? on: October 13, 2008, 02:21:54 am
Seedstudio : that's exactly the one ^^ I did not have time to buy one while I was in Shanghai, but next time I'll go, I'll bring tens of these ^^
344  Forum 2005-2010 (read only) / Bar Sport / Re: What should I get while in China? on: October 12, 2008, 10:10:15 am
To answer to your original question : you should absolutely get on of those hologram caps with a huuuuge "sun blocker" (I don't know the english name, it's the rigid part of the cap). You can turn it on your face, like a welding mask, and you'll look totally Daft Punked next time you'll go to coachella ^^
345  Forum 2005-2010 (read only) / Bar Sport / Re: What should I get while in China? on: October 12, 2008, 10:07:07 am
Damn, I hate editing my posts ^^
For the clubs, I must recommend you 2 adresses : The Shelter and The Logo. Those clubs are not huge entertainment complexes, but they have good music, there's a lot of foreigners, and the atmosphere is really nice ^^
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