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Joined 2 years ago
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Cake day: June 21st, 2023

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  • I’m one of those people that has the technical knowledge to repair most electronics. I still buy new sometimes.

    A while ago, I had to repair a faulty pellet stove. It was obvious that the main control board was bad (there was a single small circuit board connected to a handful of relays and sensors, all of which tested as good). This board contained a small cheap microcontroller, a few MOSFETs, and a handful of discrete components. A replacement was $500. Maybe $10 in parts at the most, and they wanted to charge me half the cost of the entire appliance.

    I was able to isolate the problem to a bad MOSFET and order a new one for about 50 cents. Had this been a complex circuit, there’s no way in hell I could have found the problem without a schematic.

    So in my opinion, the problem is twofold. Manufacturers want ridiculous prices for replacement parts, and no documentation exists to repair the parts themselves. They obviously have schematics from when they designed the board. They should be forced to release them.



















  • Personally, my problem was always that math concepts were never presented in a way that actually made sense in the “real world.”

    I was taught that complex numbers were real numbers with imaginary parts that had something to do with the square root of -1. Yeah, I get it, but… why?

    Fast forward a few decades and I’m writing code that processes a digitized waveform. Now it makes sense. Math isn’t hard when you have a frame of reference. Learning math concepts solely for the sake of learning them is very hard.