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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > 3 point clip vs 3 point cap

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espurr #1 03/07/2014 - 08h30

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hey everyone,

i want to build my own head tracker, but i dont know if i want to build a clip or cap version.
what are the pro's and cons off these two versions?

Thanks in advance!  :D
Stormrider #2 03/07/2014 - 19h36

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the cap model you can use with or without your headphone, you only need to wear a cap.
I started with a clip-model, now I only use a cap-model.The cap-model gave me less problems with filling in the right dimensions where it is placed.
The leds and resistor does't cost that much, maybe make both models and see for yourself what works better/easier.
espurr #3 04/07/2014 - 08h19

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i have taken some time to research and looking for parts i can use.

i came up with these components.

3 ir leds: http://www.conrad.nl/ce/nl/product/153831/Osram-Components-SFH-485-P-IR-emitter-880-nm-40-5-mm-Radiaal-bedraad

1 webcam: http://www.conrad.nl/ce/nl/product/990561/LogiLink-USB-webcam-met-LED

3 copper wires: http://www.conrad.nl/ce/nl/product/1082851/Koper-schakeldraad-Zwart-Per-meter-BKL-Electronic

also i want to use my samsung galaxy s3 usb charger with a old usb cable.
the output is 5v AC 1A.
i have calculated the resistor that i need to use, but i dont know if i calculated it correctly.
here are the screens.

Posted Image
Posted Image

can somebody check the numbers for me  :D

Thanks in advance!
Edited by espurr on 04/07/2014 at 08h21.
Jaeger55 #4 04/07/2014 - 13h38

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I built both versions and I found the Cap/visor style better.
espurr #5 04/07/2014 - 14h40

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Jaeger55 @ 04/07/2014 - 13h38 a dit:

I built both versions and I found the Cap/visor style better.



Why? do you have better visibility?
Stormrider #6 04/07/2014 - 15h29

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clip is most of the time mounted on your headphone, so you need to wear it when you play.A lot of people built both models so they can choose.
Why do you choose that webcam with leds?Iam not sure if it is a good choice for ir-tracking.
Edited by Stormrider on 04/07/2014 at 15h43.
Jaeger55 #7 05/07/2014 - 04h10

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I have a really light weight headset with a mic. Adding the clip style just felt kinda heavy to one side.  I suppose if I would have just stuck with it I would  have gotten used to it.
Steph #8 05/07/2014 - 17h37

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Hi,

your samsung galaxy s3 usb charger is a regulated power supply.
Going for a 10 Ohm resistor will be better.
espurr #9 06/07/2014 - 14h15

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Steph @ 05/07/2014 - 17h37 a dit:

Hi,

your samsung galaxy s3 usb charger is a regulated power supply.
Going for a 10 Ohm resistor will be better.



With how many watts? 1, 2, 3, 5 or 7W?
Steph #10 06/07/2014 - 16h35

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According to what you have mentioned.

5V x 1A =  5W

espurr @ 04/07/2014 - 07h19 a dit:


also i want to use my samsung galaxy s3 usb charger with a old usb cable.
the output is 5v AC 1A.



But don't care about, with a 10 Ohm resistor your serial circuit current is about 50mA that dissipate 0.03W power.
No problem for this charger.
espurr #11 09/07/2014 - 08h42

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i made my cap frame, now waiting for my leds and playstation 3 eye webcam.

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