The Raspberry Pi Thread [6]


  1. Posts : 15,037
    Windows 10 IoT
    Thread Starter
       #541

    I'm not sure if there is room for an extension? It's not as big a deal as I may have made it out to be, just a bit of an inconvenience. It's usable as is, the extra speed bump, if it supports it would be nice though. It can wait I have some other stuff on the go anyway.
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  2. Posts : 15,037
    Windows 10 IoT
    Thread Starter
       #542

    Changes night into day but you can't see it.

    The Raspberry Pi Thread [6]-dscf5512m.jpg
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  3. Posts : 5,707
    insider build 10586.3 win10 pro 64
       #543

    blue led's ?
    alphanumeric said:
    Changes night into day but you can't see it.

    The Raspberry Pi Thread [6]-dscf5512m.jpg
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  4. Posts : 15,037
    Windows 10 IoT
    Thread Starter
       #544

    Nope, not blue.
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  5. Posts : 5,707
    insider build 10586.3 win10 pro 64
       #545

    anyway ,what will it eventually do
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  6. Posts : 15,037
    Windows 10 IoT
    Thread Starter
       #546

    It will be used with my NOIR camera, hint hint.
    This is one of my few exceptions to not getting single color LED's. They are 940nm.
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  7. Posts : 5,707
    insider build 10586.3 win10 pro 64
       #547

    alphanumeric said:
    It will be used with my NOIR camera, hint hint.
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  8. Posts : 15,037
    Windows 10 IoT
    Thread Starter
       #548

    It's 24 super-bright 5mm IR LED's. They have an "approximate" 1.6v forward voltage. It varies a little bit diode to diode. I wired them up in groups of 3 in series. That's ~4.8 V which will be fine if I use 5V. It won't damage them. Doing it that way means no load resistors needed and no wasted power.
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  9. Posts : 5,707
    insider build 10586.3 win10 pro 64
       #549

    Intereseting .wish I knew what the heck it all meant ,I just stopped cleaning my Pi room and Pi accessories storage.I have way to much stuff i should have never bought , hdmi cables and hdmi to hdmi adapters ect ect ,, when I get it all sorted ,I'll give you a list and you can have any you want ,all if you want all ! its not a large number,but way more than i needed for sure. and a pi case or 3 even .
    alphanumeric said:
    It's 24 super-bright 5mm IR LED's. They have an "approximate" 1.6v forward voltage. It varies a little bit diode to diode. I wired them up in groups of 3 in series. That's ~4.8 V which will be fine if I use 5V. It won't damage them. Doing it that way means no load resistors needed and no wasted power.
      My Computer


  10. Posts : 15,037
    Windows 10 IoT
    Thread Starter
       #550

    I'm still researching it a bit before I actually power it up. Normally you have a current limiting resistor in series with the LED.
    Mine is +5V--LED--LED--LED--Ground.
    LED Calculator

    If I do the math for my setup its 0.75 ohms. Less than 1 ohm. A higher voltage on the LED means more current. With my setup (no resistor) its ~1.7 V per LED, and they are 1.6V.
    Instead of the nominal 100ma I'll get ~120ma. No big deal. I think? I'm currently still second guessing myself, lol. If I get it wrong they will be really bright for a really short period.
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