Comments for thuanta.com

Comment on Building a Wii “Sensor” Bar project by eyeonthewinner

eyeonthewinner — Sun, 07 Jun 2009 18:06:21 +0000

Nice work, i’m gonna make mine right away!!

Comment on Building a Wii “Sensor” Bar project by prince

prince — Mon, 30 Mar 2009 18:05:00 +0000

i appreciate your work

Comment on Building a Wii “Sensor” Bar project by EagleEyed

EagleEyed — Fri, 19 Dec 2008 13:52:17 +0000

I think Thuan meant
(Vsource - Vled_drop ) = (5V - 3 * 1.4V) = 0.8V
seeing from the spec that the LEDs are rated at 1.4V

Comment on Building a Wii “Sensor” Bar project by JXABC

JXABC — Thu, 01 May 2008 07:11:06 +0000

Hmm. Doesn’t the math work out to be (5-3*1.2)=1.4 volts, therefore 1.4/.05= 28 ohms?

Comment on Wiimote “Multi touch” demo by Christian Muise

Christian Muise — Fri, 14 Mar 2008 01:34:59 +0000

Just finished a project for a course with Greg:

http://molviz.cs.toronto.edu/molviz/

If you’d like to put it into a game (would be dead simple to get the head position info in real time), drop me a line.

Cheers

Comment on Interesting thought: EB Games hiring females now by Thuan

Thuan — Sun, 13 Jan 2008 22:45:35 +0000

That would make more sense - I wouldn’t think they would discriminate. I guess there’s more of them know than before.

Comment on Interesting thought: EB Games hiring females now by Ben

Ben — Sun, 13 Jan 2008 20:31:21 +0000

They’ve had girls for a while.. I remember two years ago seing one working at the one in the Eaton Centre.

Comment on Building a Wii “Sensor” Bar project by Thuan

Thuan — Sat, 08 Dec 2007 15:16:54 +0000

Yes. I’ve been able to get it to work as far as metres and beyond.

Comment on Building a Wii “Sensor” Bar project by Martin Zwigl

Martin Zwigl — Sat, 08 Dec 2007 10:43:46 +0000

Thanks for answering.

I used the same calculation and got the same result with the 16 ohms.
Do you still get enough output power on the LEDs for the controller.
That’s, why I’ve been asking. (Well I asume so, since you wouldn’t have posted it elsewise)

Cheers, from Austria

Comment on Building a Wii “Sensor” Bar project by Thuan

Thuan — Fri, 07 Dec 2007 07:14:14 +0000

Hi Martin,

You’re comment has reached me. I’m not sure how you got that calculation - can you provide some steps as to how you got that? In any case, you’ve asked a good question because I also stumbled upon something similar to this.

When dealing with LED circuits, one should use this formula as mentioned in Wikipedia (http://en.wikipedia.org/wiki/LED_circuit):

R = (Vsource - Vled_drop) / Iled

In my case, (Vsource - Vled_drop ) = (5V - 3 * 1.2V) = 0.8V and Iled = 0.05 A (should be measured in amperes) for each string of LEDs. This will get you R = 16 ohms, but the electronics store that I bought the resistors from didn’t carry 16 ohms resisters if I remember correctly. The next resistor step up that they had were 18 ohms, and using those is generally a little safer than something less than 16 since it provides sufficient resistance to power the LEDs.