Completely EMF free mouse - it exists (if you can afford it)

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Completely EMF free mouse - it exists (if you can afford it)

casper
This post was updated on .
Trying to figure out how to build or buy a completely EMF-free optical mouse without any electronics in it, I came across these MRI (magnetic resonance imaging) fully optical controllers.

When you put people in MRI machines, and you want to monitor their responses to commands or cues, you cannot put anything metal into the MRI machine. The magnetic fields are so strong any metal objects would become lethal projectiles.

So we have companies that develop fully plastic and optical controllers, keypad controllers, and even mice. These things exist, and would be perfect for us who are EMF sensitive.

The only problem is the price.    
The fact is these things are possible to make, and these companies charge ridiculous prices, just because it's only medical companies that are buying them.

Time to start pressuring these companies to make affordable consumer devices?

When will a consumer-oriented company wake up to the demand. I'm sure most of us would gladly buy something like this if it was available below $500.

Some examples:

Mouse:  
http://natatech.com/products/complete-response-systems/fmri-mouse-system

Fully optical trackball:  
https://www.curdes.com/mainforp/responsedevices/hhsc-trk-2.html

Optical game controller:  
https://www.curdes.com/ogc1.html


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Re: Completely EMF free mouse - it exists (if you can afford it)

Merializer
This post was updated on .
i contacted Ben Krasnow a long time ago,
but he didn't want to help me much, he didn't have time.
If there would be plans and a tutorial, i might try to make one,
and find someone who can help me. But it's not really a priority for me
because i have my separators, but it would be nice to have for gaming.

Another idea is to give this info to a school so kids studying electronics can try
make a mouse and keyboard as an exercise or end work and it would help disabled people...
so many good reasons.
And then they could publish the build plans on the internet on like: http://www.instructables.com

Fiberoptic mouse:
http://benkrasnow.blogspot.com/search/label/fiberoptic

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Re: Completely EMF free mouse - it exists (if you can afford it)

casper
This is amazing. In his other video about the joystick, I think he explains it well enough I think it would be possible to build it based on just that information:

https://www.youtube.com/watch?v=dbrvLQamR0U

He lists all the parts and how they interact.

Merializer wrote
Another idea is to give this info to a school so kids studying electronics can try
make a mouse and keyboard as an exercise or end work and it would help disabled people...
so many good reasons.
I have been thinking along the same lines. About 6 months ago I contacted one of these MRI equipment manufacturers, but they were not interested either. They said they get occasional contacts from EMF sensitive people, but they are not interested in selling their $3k-10k products for $500 a piece.

I quickly looked at the parts list from Ben's joystick post:    
http://benkrasnow.blogspot.com/2010/12/fiberoptic-joystick-with-quadrature.html

The most expensive part is the fiber optic transmitter and receiver. Those are around $15 a piece, and it seems you need 8 of them. In any case the total cost is probably still less than $200.

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Re: Completely EMF free mouse - it exists (if you can afford it)

Merializer
This post was updated on .
BTW, that fiber optic mouse seems to be build
with a mechanical mouse (roller bal type mouse)...
It's hard to see in his video because he didn't film it well,
but because i was studying how he made it, i noticed it.
The inside of the mouse he used looks a bit like this mouse
i tested:
https://youtu.be/Th5zEdSfhS8?t=204

But he says it's just a standard mouse, which is misleading.
You need the wheels that are turned by the ball from a mechanical mouse,
which are likely used to break the light. He talks about it in his video in the first minute.
There are no wheels in optical mice, so...

So you would of coarse have the same issues with it like
with mechanical mice, which a lot of people don't like,
although there are probably slightly better functioning models than others,
since i notice that the ones i tested are not all build equally.
I think it would still be worth trying to build it,
but while at it, one could try to figure out how to build one like
the 2600$ fMRI mouse which works like an optical mouse,
they talk about 1800dpi.
I'm sure someone must be able to build that much cheaper.
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Re: Completely EMF free mouse - it exists (if you can afford it)

Karl
I have an old Mouse Systems optical mouse and two of the pads that they used. That would be a lot easier to replicate than a modern-style optical mouse because it doesn't require as many optical fibers. (Most new optical mice use a 16x16 pixel sensor, so they would need at least 256 optical fibers and also a light source inside the mouse.
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Re: Completely EMF free mouse - it exists (if you can afford it)

Karl