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Joined 1 year ago
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Cake day: September 14th, 2023

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  • A relay switch could work. You would put the car 12V and ground across the coil connections, the 12V on the NO connection, the panel on the NC connection, and the power pack on the C connection. Make sure you get a 12VDC relay.

    Are you going to have the panel installed permanently on your car?

    Definitely don’t connect a 24V source directly to your cars 12V system. There’s a good chance of frying something important. A fuse would not protect from overvoltage so don’t rely on those to protect components.


  • Fermion@mander.xyztoSpaceX@sh.itjust.worksSpaceX Starship Flight 4
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    4 months ago

    I find it interesting that the hot stage jettison is after the boostback burn. That implies to me that the purpose of the jettison isn’t for weight reduction. I wonder if there are aerodynamic control reasons to jettison the hot stage.

    I also wonder if the hot stage ring is expected to sustain enough damage to be a single use part anyway.




  • Fermion@mander.xyztoMildly Infuriating@lemmy.worldPlastic tea bags
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    7 months ago

    That’s a little hyperbolic. There’s a lot of mechanics at play in generating microplastics. Fabrics have microscopically thin strands of plastics. It should be no surprise that rubbing up against thousands of tiny strands every time we move and wash synthetic fabric clothes releases many tiny particles. Plus clothes have to deal with UV degradation making the plastic more brittle.

    The plastic components in an RO system should be specced to not leach plasticizers. They should have smooth walls and laminar flow. There shouldn’t be much to abrade the plastic surfaces and shed particles. They may not be perfect, but water from an RO system will have orders of magnitude fewer microplastics. So an RO system still “does something about it.”

    We do need to address the problem, but I wouldn’t want people to avoid beneficial remediation just because it has some plastic components.


  • Even if you’re confident that the only people working a task are competent, they will eventually do something idiotic. Someone will have multiple nights with barely any sleep, or work really long shifts, or have a terrible event in their personal life. Eventually, someone will be trying to do their job while not fit for the task.

    The concept of idiot proofing can sound derogatory or elitist at times, but the reality is that any one of us could end up being the idiot given bad enough circumstances.