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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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That blue trace looks mildly suspicious even to me.
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I suppose calling it a “curve tracer” isn’t quite accurate
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It applies a known current to the LED through a logic-level MOSFET,
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Masking tape holds small PCBs to the platen reasonably well
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And then the magic happens
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Admittedly, turkeys don’t fly all that well.
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They’re pretty much invisible, of course.
The Smell of Molten Projects in the Morning 