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Project Plans for the Raspberry Pi Sense HAT?

spannerspencer

imageI have to say that the Raspberry Pi Sense HAT looks like a very alluring piece of kit. All that delicious motion sensing, for one thing, but my spider-sense is tingling when I look at that 8x8 LED matrix, too.

 

Right off the top of my head, I'm not sure what I'd like to do with one of these in terms of a specific project (as opposed to just playing with it, which is where my current inclinations are to be found!). So I thought I'd ask if any of you guys have any grand schemes in mind for putting the Sense HAT to good/useful/entertaining/frivolous/evil purpose.

 

Let's get our motion-sensing inspiration flowing!

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  • Another few ideas (just throwing ideas out there!) again currently mainly concentrating on the LED portion are:

    (a) A monitor/graphics card calibration device - I'm not very knowledgeable in it, but if all of these sense hats have similar LEDs (i.e. same optical binning of parts) then it is in effect a reference, and therefore perhaps a monitor calibration tool could be made. Basically it would display (say) a pre-defined grass-green color, and you could hold it alongside your monitor displaying such a predefined color block (e.g. a supplied jpg file), and adjust your PC graphics settings until they look similar. Then, click to display (say) sky-blue on the sense hat and on the PC, and make the graphics adjustment again. Even if the LEDs were not binned, perhaps across 64 of them the average would be "good enough" to use. This is all a guess. I suppose sense hats purchased from different production batches could be visually compared for color consistency.

     

    (b) A light-pen and color display or input tool like a mouse. Connect up a photodiode to one of the inputs, and then get the LEDs to pulse rapidly one-by-one (like an old-school raster-scan) and hence when the photodiode picks up the pulse, you know which of the 64 LEDs it is pointing at. This should be feasible if the Atmel chip handles the fast timing and photodiode input. Probably some effort to code, but feasible.

     

    (c) If a fast update is possible (e.g. 120Hz!) then perhaps it is possible to get 3D output (albeit low-res) with active shutter glasses (which are quite cheap these days) and some sync circuit (no idea how the sync works, but I'm guessing it is an infra-red LED transmitting some simple code).

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  • Another few ideas (just throwing ideas out there!) again currently mainly concentrating on the LED portion are:

    (a) A monitor/graphics card calibration device - I'm not very knowledgeable in it, but if all of these sense hats have similar LEDs (i.e. same optical binning of parts) then it is in effect a reference, and therefore perhaps a monitor calibration tool could be made. Basically it would display (say) a pre-defined grass-green color, and you could hold it alongside your monitor displaying such a predefined color block (e.g. a supplied jpg file), and adjust your PC graphics settings until they look similar. Then, click to display (say) sky-blue on the sense hat and on the PC, and make the graphics adjustment again. Even if the LEDs were not binned, perhaps across 64 of them the average would be "good enough" to use. This is all a guess. I suppose sense hats purchased from different production batches could be visually compared for color consistency.

     

    (b) A light-pen and color display or input tool like a mouse. Connect up a photodiode to one of the inputs, and then get the LEDs to pulse rapidly one-by-one (like an old-school raster-scan) and hence when the photodiode picks up the pulse, you know which of the 64 LEDs it is pointing at. This should be feasible if the Atmel chip handles the fast timing and photodiode input. Probably some effort to code, but feasible.

     

    (c) If a fast update is possible (e.g. 120Hz!) then perhaps it is possible to get 3D output (albeit low-res) with active shutter glasses (which are quite cheap these days) and some sync circuit (no idea how the sync works, but I'm guessing it is an infra-red LED transmitting some simple code).

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