Author Topic: Searching for the Hardware / Tutorial  (Read 15489 times)

Offline stetson79

  • *
  • Posts: 2
  • Karma: +1/-0
    • View Profile
on: January 11, 2008, 07:48:09 AM
Hi!

I will now get the Finer-Tracking started, but I don't know, how to build an infared-array.

Where can I find the Hardware or is here still a tutorial for it?



Offline katzmatt

  • *
  • Posts: 3
  • Karma: +0/-1
    • View Profile
Reply #1 on: January 12, 2008, 04:55:32 PM
do what I did either build Ir pens (best solution ) of take a gander at the cheap prices at www.goldmine-elec.com and the ir leds at either www.goldmine-elec-products.com/prodinfo.asp?number=GP54
or www.goldmine-elec-products.com/prodinfo.asp?number=G2318A  ( best deal and the one that I got
anyway go grab a solderless breadboard at www.goldmine-elec-products.com/prodinfo.asp?number=G16567
(cheaper than radioshack for anything)
and a kit of jumpers at www.goldmine-elec-products.com/prodinfo.asp?number=G16572
and a 9 volt and a 9 volt adapter also found on the website
then wire it up with short leg to short leg and long to long then wire the sets of 2 or 3 in parallel and put in a switch and have some finger trackin' goodness



Offline squirrelsnuts

  • *
  • Posts: 4
  • Karma: +0/-0
    • View Profile
Reply #2 on: April 14, 2008, 12:04:21 AM
katzmatt,
   How many leds did you use? I started with 4 leds (incorrectly assumed 1.6V voltage drop for them, the package says 1.2V) and a 2 AA (3V) battery powersupply, just to get the hang of soldering and general board stuff. I entered this into ledcalculator.net and it said I needed 4 pairs of an led and a 15 Ohm resistor in parallel. (See pics). I was able to pick up all of this at the local RadioShack.
   The wiimote read them as one IR Source (approx 1" spacing between leds) but had a > 15ft reach (I ran out of room!) I did not have any reflective tape (to be remedied tomorrow!), and my bike reflector  :-[ was a bit chaotic and generally unusable.

[Update 04/16/08]
   I managed to get some reflective tape for a few bucks at an automotive repair shop, in the lights and reflectors section. With just the 4 leds, I was able to get the wiimote to track my finger. It was very limited, so I suspect a few times more leds will do the trick. I ordered 35 more so we'll see!
[/Update]

  I see on the "Tracking fingers with the Wii Remote" yt video, he uses 100 leds! I can't tell what kind of power supply he uses, but when I plug in 98 100mA leds (assume 1.2 V led drop) to the ledcalculator.net site, w/ 9V power source, the diagram has the 14 rows of 7 leds in parallel.

   Can anyone comment on any successes they have had with this? How many leds, wiring configurations (parallel, serial does it matter?) power source? What kind of reflector tape? 3M sells some, did that work for anyone?

  Great forum, I hope we can get more answers to the questions on this site!
-- Squirrel
 
« Last Edit: April 16, 2008, 11:18:38 PM by squirrelsnuts »



Offline UndCon

  • Support Admin
  • *
  • Posts: 566
  • Karma: +11/-3
    • View Profile
    • UndCon
Reply #3 on: April 14, 2008, 02:08:48 AM
Im using this kit (Kemo B223)




http://www.kemo-electronic.de/en/bausaetze/b223/index.htm

32 diodes and powered by an 12volt adapter from a dead router...

works great!


here are the specs:

With the infrared spotlight CCD- and video cameras may recognize objects also in complete darkness. The infrared light is invisible for men, CCD-cameras can see well with an infrared spotlight. Perfect for inconspicuous observation of entrances, drives etc. Operating voltage: 12...14V= approx. 300mA. Range: approx. 5m.

Technical data:

Operating voltage: 12...14V=
Current consumption: approx. 300mA
Light frequency: approx. 870 ... 950nm
Board dimensions: approx. 75 x 56 mm
« Last Edit: April 14, 2008, 02:10:20 AM by UndCon »



Offline squirrelsnuts

  • *
  • Posts: 4
  • Karma: +0/-0
    • View Profile
Reply #4 on: April 14, 2008, 08:53:42 AM
UndCon,
   Thanks for the reply. I think it might be good to have as much information on this as possible.
Have you played with the reflector tape with this ir array? Any luck?

--- Squirrel



Offline UndCon

  • Support Admin
  • *
  • Posts: 566
  • Karma: +11/-3
    • View Profile
    • UndCon
Reply #5 on: April 14, 2008, 09:29:57 AM
I only had some reflective material I bought in a shop for fabrics/handycrafts years ago.

(actually reflective that you put on clothes and such - similar to those found on childrens clothing)

And no I didnt try that much - only verified it worked and then put it aside for future projects(ir-gloves)

EDIT - spelling
« Last Edit: April 18, 2008, 05:04:51 PM by UndCon »



Offline Sixpack

  • *
  • Posts: 1
  • Karma: +0/-0
    • View Profile
Reply #6 on: April 28, 2008, 07:50:33 AM
Reflective Tape found and used on mail boxes worked fine for me.  You can pick up the strips in Home Depot or Lowes.  It usually coms in packs of 6 strips and ran about $5.



Offline squirrelsnuts

  • *
  • Posts: 4
  • Karma: +0/-0
    • View Profile
Reply #7 on: April 29, 2008, 12:50:42 AM
UndCon:
Im using this kit (Kemo B223)
Can you post the circuit diagram? ledcalculator has kind of a funky configuration for 32 leds with a 12V source, and I can't tell what Ohmage the resistors are (they have too many bands?).

Maybe I should just buy an IR spotlight and take it apart :D

-- Squirrel




Offline UndCon

  • Support Admin
  • *
  • Posts: 566
  • Karma: +11/-3
    • View Profile
    • UndCon
Reply #8 on: April 29, 2008, 03:10:09 AM
No problem - when I get home I'll try to get a good picture of the diagram.
(I have no scanner)

There is a nice schematic in the instructions...

//UndCon



Offline RiXtEr

  • *
  • Posts: 20
  • Karma: +1/-0
    • View Profile
Reply #9 on: April 29, 2008, 01:54:48 PM
Maybe not the best solution, but if your IR leds take 1.5V or higher 8 Leds x 1.5V = 12V so solder 8 Leds together short leg to long leg in 4 sets (4*8=32) No resistors needed (at least I haven't burnt any LEDs up yet). Should look like this   

  +0-+0-+0-+0-|            +0-+0-+0-+0-|
                      |                                |
  -0+-0+-0+-0+|            -0+-0+-0+-0+|

  +0-+0-+0-+0-|            +0-+0-+0-+0-|
                      |                                |
  -0+-0+-0+-0+|            -0+-0+-0+-0+|

Connect all the open +'s to the 12v+ and the open -'s to the 12v ground.

Aimed right this gave me about a 3 foot range with the wii remote behind the led arrays.



Offline UndCon

  • Support Admin
  • *
  • Posts: 566
  • Karma: +11/-3
    • View Profile
    • UndCon
Reply #10 on: April 29, 2008, 04:17:32 PM
In my diagram there is 5 LED's and 220 ohm resistors repeated eight times

Here we go:
http://undcon.com/mods/irarray/

Handy images of the array - specifications can be found above...

//UndCon
« Last Edit: April 29, 2008, 04:59:44 PM by UndCon »



Offline bremnerr

  • *
  • Posts: 1
  • Karma: +0/-0
    • View Profile
Reply #11 on: August 15, 2009, 09:29:19 PM
Hi all, I'm new to this technology and have some high ambitions. I will probably be relying on these forums for assistance :).

I have successfully built 2 IR pens that seem to work quite well.
Check out the pictures here http://www.facebook.com/album.php?aid=30779&id=1483641776. (Facebook Link)

Now I want to try the finger tracking project. I ordered two IR arrays from MCM.
The Keno kit http://www.mcmelectronics.com/product/28-8070
and a pre-assembled model also by Keno
http://www.mcmelectronics.com/product/28-6418

I also ordered some 3M High Gain reflective tape from Identi-tape
http://www.identi-tape.com/high-gain-sheeting.html

I will keep the everyone posted on how well they work.