A colorbox

When I photograph small things, I'd like a variable color light. This is a gadget box to do that - it has 3 knobs on top, for red green and blue, and it generates a monitor output with a screen full of that color. In effect I'm going to use an HDMI monitor as a colored area light.

It starts with an Adafruit Metro M4, running Circuitpython.

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On top of that, the Gameduino Dazzler for HDMI output:

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For the input interface, I used parts from Electric Dollar Store:

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$8.40 and ten minutes later, I had a 3-potentiometer I2C peripheral, which plugs in on top:

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With the knobs on, looking quite functional.

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The CuircuitPython code is short and sweet. It reads the R,G,B values from the three I2C knobs, and clears the screen. I added small dials at the top so I can keep track of what colors work.

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All in all, quite satisfying. There's a feeling of the instantaneous feedback when you turn the knobs to fine-tune the screen color.

Thanks for reading.