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After about eight years and a similar failure last year, this came as no surprise: It’s a W5W “parking light” in the same fixture as the melty halogen high-beam bulbs (used as daytime running lights at half power), so it gets toasted on those occasions when we drive somewhere. The adhesive holding the LED strip…

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A gas-tight joint is a happy joint.
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And now for the long-awaited and much anticipated thermal coefficients for the insulated and greased Thermal Core:
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A cheap mechanical switch works just fine!
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In an ideal situation, the coefficient wouldn’t change
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Now we can compute the temperature differences between interesting locations on the Thermal Core.
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This would be significantly easier if I had a thermocouple with a known-good calibration, but I don’t.
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The general idea is to put all the thermocouple beads in close proximity so they share the same temperature…