[–] 10 points 1 week ago (1 child)

This shape is called a Klein bottle if anyone was curious. There are some neat math videos about topology that discuss it. Water poured into the top can get into the interior through the handle.

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  • [–] 7 points 3 weeks ago

    I once fixed a broken guitar app for an elderly friend of mine. It was damaged during a lightning storm. He called the manufacturer, but they were from Europe and shipping it for repairs would cost more than a new amp. I offered to take a look, and after some probing with an oscilloscope and an AUX cable pushing some Mozart, I was able to find the signal stopped at a pre-amplifier at the input. I ordered a replacement IC for a few cents, and swapped it out. Worked like new after that. I was very satisfied to have saved it when the fix was so small.

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  • [–] 33 points 2 months ago (13 children)

    If you live in a climate that needs air conditioning to be comfortable most of the year, your roof and walls should be as white as possible. I have seen black shingles on new construction in Texas…

    Also, toilet paper direction is a personal preference and is often driven by needs like pets and toilet/wall distances.

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