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RGB LEDs vs. having 10+ monochromatic light sources #6
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Submitted a CrowdSupply application and contacted Pimoroni. Message to Pimoroni:
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xref-ing the 10-channel wavelengths with color descriptors:
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Dotstar wavelengths are certainly narrow: |
Here's an example of non-linear, non-monotonic behavior: using forward voltage as a parameter could introduce a non-linearity into the task. For example, multi-objective optimization of maximizing luminescence, color matching, and minimizing total power (granted forward voltage is likely not controllable with Blinkt!, at which point it might be easier to use the separate wavelengths instead). This is of course assuming that the inflection point isn't going to lead to complete device failure with normal, repeated use. If I'm trying to maximize luminescence, then I might need to monitor the temperature of the board. However, it's also probable that the influence of temperature on wavelength will be low relative to the spectrometer resolution; meanwhile, the influence of temperature on flux/efficiency will still probably be there. This doesn't necessarily imply multiple local optima, however. |
Considering PCBWay for assembled PCB service. Probably should make a breadboard prototype with LEDs from Amazon first for verification. |
Liam from PCBWay generously offered free prototyping for this project. |
For NeoPixel, it's different data https://forums.adafruit.com/viewtopic.php?f=47&t=66146.
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An array of RGB LEDs + a spectrometer might not be the best match-up. RGB LEDs + a sensor designed for a single color value (e.g. RGB Color Sensor with IR filter and White LED - TCS34725) or monochromatic lasers (e.g. Laser Diode - 5mW 650nm Red) + the 10-channel spectrometer might be a better match-up. Tunable laser(s) probably too expensive.
See also https://www.adafruit.com/product/3595
Will see once the hardware comes in and I start testing.
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