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IrDA

ElectricFeel
ElectricFeel
First Anniversary Second Anniversary Third Anniversary Fourth Anniversary First Post 10 Posts 100 Posts You Look Familiar
January 2016
edited January 2016
in Coatings, transdermals, other implants
Maxim finally shipped out those samples I ordered a few months ago, and I'm going to start breadboarding up some circuits for them to play with.
Question is, how do I test skin transmittivity? I'll select the IrLED and detector to fit into the infrared window, but what do you guys think would be a good way to test skin transmission? If you think it's worthwhile I'll knock together a complete implant with storage, but that seems a bit much to evaluate IrDA.

Comments

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  1. ThomasEgi
    ThomasEgi
    First Anniversary Second Anniversary Third Anniversary Fourth Anniversary Fifth Anniversary Final Anniversary First Post 10 Posts 100 Posts 500 Posts You Look Familiar Paging Mr. F Welcome Committee We Have Touchdown
    January 2016
    lift up your skin, clamp it in place with something, maybe add some light-blocking around the LED so the light has to pass through the skin , in and out. No surgery needed.
  2. ChrisBot
    ChrisBot
    January 2016
    Wow, finally. I'm excited to see how this goes. Maybe you could use some pig skin or something, bacon? :D
  3. AlexSmith
    AlexSmith
    January 2016
    um... if you are an uncircumcised male you have a pretty easy way to test light transmission of skin.
  4. ElectricFeel
    ElectricFeel
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    January 2016
    Not applicable, haha
  5. TheGreyKnight
    TheGreyKnight
    First Anniversary Second Anniversary Third Anniversary Fourth Anniversary Fifth Anniversary Final Anniversary First Post 10 Posts 100 Posts 500 Posts You Look Familiar Welcome Committee Paging Mr. F
    January 2016
    I have an article on the light transmission properties of skin (LINK). Found it while I was looking for research for my Neuro-interface project.
  6. ElectricFeel
    ElectricFeel
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    January 2016
    My other concern is how to coat something so it's not going to dissipate a lot of the IR, silicone will fuzz it up and anything opaque is right out.
  7. ChrisBot
    ChrisBot
    January 2016
    @ElectricFeel, perhaps Parylene? You could still see the NorthStar's Led plenty bright through that. Maybe just a bigger LED if you need to. I was also thinking of the apparatus that you would use to program it. You could always have some sort light blocking material around the programming site.
  8. ElectricFeel
    ElectricFeel
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    January 2016
    What do you mean to program it? You would use the same data link channel as the other data.
  9. ChrisBot
    ChrisBot
    January 2016
    Sorry, *Data Transfer Site/Data Transfer Apparatus
  10. ThomasEgi
    ThomasEgi
    First Anniversary Second Anniversary Third Anniversary Fourth Anniversary Fifth Anniversary Final Anniversary First Post 10 Posts 100 Posts 500 Posts You Look Familiar Paging Mr. F Welcome Committee We Have Touchdown
    January 2016
    I wouldn't get stressed up about the implant coating diffusing the light. The skin will do that anyway. 2 mm more or less hardly make a difference. You'll have to drive it half duplex with a protocol to avoid collisions anyway. Nothing too hard tho.
  11. ElectricFeel
    ElectricFeel
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    January 2016
    You always want to optimize at the physical layer before you start designing protocols. Good footing leads to better results, and I always try to consider every possible failure mode before I get started.
Displaying all 11 comments