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House just got a HEPA air filter, so of course I wanted to see how well it worked. Repurposed an old Open Book prototype + a new @adafruit air quality breakout to make a #CircuitPython air quality monitor. Steep drop in particles when turned on; good news! https://gist.github.com/joeycastillo/e70529e759756d3994640dee444d62d6

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