Author Topic: My pen Schematic  (Read 22825 times)

Offline atomriot

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on: January 10, 2008, 08:58:33 AM
Pretty much follows the image from the initial blog site.
I have now built 2,
one using a Sharpie Accent pen body


and one using a Bic Ultra Round Stick Grip


from radio shack i got the rest

Infrared LED
part: 276-143


Momentary Switch
part: 275-1571


1 AA battery holder
part: 270-401


here is a picture of the two i got so far. they work but are less than pretty.
the first one was the bic pen. i got the momentary switch before realizing that the switch was longer than the pen. thats one reason i switched to the sharpie.
the other thing on my pens is if you look at where the LED is, there is the clear cap on the bic and the end cap from the bic is on the sharpie. when i used the tracking box from the wiilib example, it makes it show up so much better.

Also i tried to find a different battery container that is just a cap for a single AA but i could not so i will have to make one later. When i get one, the battery on the sharpie will be inside with the original cap on the end.



also on the bic i initially superglued the button in place then the pen stopped working properly come to find out the glue i used is conductive (future glue) so be weary of that... heh

they dont look great but they work. so thats all i need. heh.

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
--
James Lionel Price



Offline Ingmar

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Reply #1 on: January 13, 2008, 12:13:59 PM
Nice pens! I got the software to work with a lighter, but I still don't know how to make the best pen. Do you have a video of your best working pen?
Regards!



Offline atomriot

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Reply #2 on: January 13, 2008, 12:20:18 PM
i am getting the stuff together to make one more. i suppose i can turn it into a video. i just need some time. the radio shacks around here are running our of IR LEDs heh

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
--
James Lionel Price



Offline Ingmar

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Reply #3 on: January 13, 2008, 12:49:00 PM
Haha, but I meant a video of one of your pens in action. I would like to see how good it works  ;)



Offline troy59

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Reply #4 on: January 16, 2008, 10:15:05 AM
lol, i just bought out all of the ir leds at radioshack because they were having an end of the year clearence sell, all the resistors and leds and junk were %50 of, i'll be pretty good on those for a while, lol



Offline atomriot

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Reply #5 on: January 16, 2008, 10:35:29 AM
yea the ones around me are running slim on IR leds. all they have is the combo pack that has the weak IR LED in it....

i am waiting for them to restock so i can build a 3 or 4 LED pen because sometimes our whiteboard is too bright for the wiimote to pick up the pen.

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
--
James Lionel Price



Offline troy59

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Reply #6 on: January 16, 2008, 10:36:49 AM
ya, i hate when things go out of stock, its so annoying, sometimes i feel like suing because if incompetence



Offline bryanarby

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Reply #7 on: January 16, 2008, 11:23:11 AM
They can't expect us to come around and buy em empty :P We are what they call "an unsuspected askflow for a certain product". They ain't prepared for us ^^

wiipen
point ATM: building V2
V1: 1 LED on 1 AAA battery feed
V2: 1 LED on USB feed
V2 will be remodded too V3
V3: 1 LED on USB feed /w LMB and RMB
V4: 1 LED WIRELESS /w LMB and RMB
V5: we'll see :3
Vmany: Bluetooth IR pen with mouse functions.


Offline troy59

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Reply #8 on: January 16, 2008, 11:26:41 AM
lol, your too nice



Offline jameslao

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Reply #9 on: January 16, 2008, 06:00:46 PM
I'm building a pen with similar parts (but using a slide switch instead). So they worked fine hooking the LEDs to a AA battery without a resistor?



Offline atomriot

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Reply #10 on: January 16, 2008, 06:42:39 PM
yes, they are still alive and working well. you only need a resistor if your main power source is greater than the maximum voltage of your combined LEDs.

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
--
James Lionel Price



Offline jameslao

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Reply #11 on: January 16, 2008, 06:51:47 PM
The product page for the IR LED says:

Quote
High output infrared LED 5mm 1.2VDC 29mA 940nm

If I remember correctly, a AA battery is 1.5V which is greater than the 1.2VDC the LED accepts. Or did you use a rechargeable battery which according to Wikipedia is 1.2V? I trust that it works, but I'd like to understand it all.

Thanks



Offline dice

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Reply #12 on: January 16, 2008, 10:24:09 PM
there is 2 different IR LEDs at the Shack.  one has a forward Voltage of 1.5 and the other 1.3. (I just went yesterday and saw)  Also from what i have seen most are tolerant up to 1.6v

and I have seen that with most other websites that sell IR LEDs they say 1.2-1.6v

Just letting you know

Dice

Found this on Superbrightleds.com
http://superbrightleds.com/specs/IR2730_specs.htm

From ledsupply.com
http://www.ledsupply.com/l2-0-ir3th60-1.php

Good List of IR LEDs (even surface mount)
http://www.ledtronics.com/ds/SML10IR941T/
« Last Edit: January 16, 2008, 10:37:22 PM by dice »



Offline troy59

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Reply #13 on: January 17, 2008, 09:57:51 AM
question: is greater ma better, or lower. I'm ordering 150ma leds but should i get 50ma?



Offline ZaPPZion

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Reply #14 on: January 17, 2008, 12:06:38 PM
150mA gives more IR light (if it's of the same quality ofcourse).