Author Topic: Help calibrating in a classroom  (Read 6409 times)

Offline MattSacks

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on: September 03, 2008, 09:11:34 AM
Hello all,
I'm trying to implement the Whiteboard at our college, but unfortunately I'm having some troubles with the set up. 
I'm able to get the Whiteboard to work on my desktop LCD screen, using both Johnny Lee's and Uwe's programs, but when I switch to the big classroom with the projector set up, I can't get the Wiimote calibrated. (Hardware is the same for both computers) I've tried all different placements for the Wiimote, from right next to the projector, to putting it on an angle, but can't get it going.  The only way I could get it calibrated was moving the projector to within 4 feet of the board it is projecting on, which is obviously not feasible for a real classroom set up.
I've been reading the other posts in the support section, but still can't seem to find a good fix.
(I also can't seem to get BoonJin's program to work, as I know there is calibration there)
Any help would be greatly appreciated.
-Matt



Offline MattSacks

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Reply #1 on: September 03, 2008, 12:01:26 PM
Update:
Got everything working now, again using Uwe's program; my problem now is that its very choppy; when I draw, it just shows up as dots.  I'll do some more reading on this board and post again if I can't figure it out.
Thanks!
-Matt



Offline benpaddlejones

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Reply #2 on: September 03, 2008, 05:40:01 PM
Mattsacks
Sounds like your IR-Pen may not be up to it.

Which IR-Led are you using?

Read: http://www.wiimoteproject.com/ir-pens/electronics-101-sharing-my-mistakes!-***-updated-***/ for more info about IR_leds and powering them.

Benpaddlejones :)


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Offline MattSacks

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Reply #3 on: September 03, 2008, 11:35:22 PM
Hey Ben,
I'm using a Vishay 6400.
OS is Windows XP
Bluetooth Adapter is Rocketfish (from Best Buy).

Everything works perfectly on my desktop, but when I switch to the classroom w/ the projector everything is choppy.  Calibration is ok, but performance is choppy.
I'll keep troubleshooting and reading along, but suggestions are welcome.
Thanks,
Matt



Offline benpaddlejones

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Reply #4 on: September 03, 2008, 11:50:33 PM
MattSacks
Please give me the following details so I can help diagnose:

IR-Pen
1. Switch type
2. Power source (battery qty, size & Voltage)
3. Resistor

Computer
1. Operating system

Cheers

Ben :)


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Offline cortay

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Reply #5 on: September 05, 2008, 07:30:08 PM
Ben,

I am using a SPST momentary switch from Radio Shack and an infrared LED from there (1.5).  I am running Boon's program in Windows......I still can't get a calibration higher than 30%....I have ordered the Vishay 6400 LED hoping to improve the calibration and I will add a resistor.........Is there something else I should be doing?????



Offline benpaddlejones

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Reply #6 on: September 05, 2008, 10:53:11 PM
cortay
2 Problems

1. Poor IR-Led - You need to upgrade to a Vishay TSAL6400 (use a 1x AAA/AA 1.2v NIMH and no resistor is required)

2. Calibration (not made easy by Poor IR-Led once you get a better IR-Led) using the visual calibration assiatant in Wiimote Smoothboard to move Wiimote to optimum location you should be able to get 60%+ tracking utilization which is perfect (very finiky and time consuming to get higher than 75% and makes no difference).

Goodluck

Benpaddlejones



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Offline tino

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Reply #7 on: September 08, 2008, 12:06:35 PM
Hi Matt,

Your pen has the following configuration:

  • 401-1766-2-ND (switch)
    A23 Energizer (12V) - (battery)
    Vishay 6400 - (IR LED)
    120 ohm 2 watt (Resistor)

I am going to send you an updated pen using an Energizer AAA Lithium battery.  I spoke to the folks at Energizer and they feel this battery has a better curve at 100 ma (1.6 - 1.3 V).

Thanks,
Tino



Offline benpaddlejones

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Reply #8 on: September 08, 2008, 06:06:50 PM
I am going to send you an updated pen using an Energizer AAA Lithium battery.  I spoke to the folks at Energizer and they feel this battery has a better curve at 100 ma (1.6 - 1.3 V).

A much better battery choice, but will also need to replace the resistor.

Benpaddlejones :)


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