Why Head Tracking?

[swiss]

Originally Posted by albx

yes why? i just plug it in a front usb in my pc....

I don't think many went with this solution.

I also made an experience of pure horror due to this.

Since I built two FT sets(1 hat/ one for headphones), and had(or wanted to sacrifice) only one USB cable, I installed a circular connector(m) to the other end of the USB cable - and the same (f) to each headset.
The resistor was installed right above the strap to adjust the size of the cap.


Now:

Did you know that the Lacie external HDD PSU uses the same size of connector?

I was playing IL2 when I suddenly smelled something burn.
I turned my head to the window where I was reflected.
There were SPARKS flying from the back of my HEAD!
In terror I removed my cap and threw it on the desk - solder flying around as it hit the table top.
The smell of burned hair was suddenly evident too.



btw: an overheated resistors loses all of the resistance...

[albx]

Originally Posted by swiss

I don't think many went with this solution.

I also made an experience of pure horror due to this.

Since I built two FT sets(1 hat/ one for headphones), and had(or wanted to sacrifice) only one USB cable, I installed a circular connector(m) to the other end of the USB cable - and the same (f) to each headset.
The resistor was installed right above the strap to adjust the size of the cap.


Now:

Did you know that the Lacie external HDD PSU uses the same size of connector?

I was playing IL2 when I suddenly smelled something burn.
I turned my head to the window where I was reflected.
There were SPARKS flying from the back of my HEAD!
In terror I removed my cap and threw it on the desk - solder flying around as it hit the table top.
The smell of burned hair was suddenly evident too.



btw: an overheated resistors loses all of the resistance...

very funny and of course dangerous... well, i took my preacautions and isolated everything... used a resistor for each led and measured the current so i don't think i will overload the usb... but always something can go wrong.

[swiss]

Originally Posted by albx

very funny and of course dangerous... well, i took my preacautions and isolated everything... used a resistor for each led and measured the current so i don't think i will overload the usb... but always something can go wrong.

I connected the hat to the PSU of the external HDD(12V/2A!) - not the USB.

[SEE]

Originally Posted by albx

very funny and of course dangerous... well, i took my preacautions and isolated everything... used a resistor for each led and measured the current so i don't think i will overload the usb... but always something can go wrong.

You do not need to run your LED's at max current (as often suggested in Freetrack DIY articles). I run three 1.8V IR LED's at 60% of their max current rating, wired in series and power them using a 4.5V mobile Phone Charger - max current is 70ma (0.07A) and I enjoy perfect tracking. If I were to use the USB 5V supply I would use a series resistor of around 10 ohms.