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Joined 1 year ago
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Cake day: June 7th, 2023

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  • Dimmers will typically use a triac which cuts up the sinusoidal waveform. It doesnt actually lower the amplitude per se, but it limits the fraction of the time the waveform is on. Kinda like this. This means that a lot of the time the led isnt gettingas much or any power. The average power will be lower, and if the LED driving circuitry isnt designed to compensate for this, the LED will flicker.

    Clarification on triacs: they get turned on a certain fraction of the way into the cycle. Triacs will stay on until the voltage across them is 0. Conveniently the zero-crossing of the AC wave (when the wall voltage crosses zero to start foing negative or from negative to positive) does just that.





  • A car output is going to be ~12-14Vdc and the solar panel at 24V. You do not want to connect those two together. Ideally you have some kind of switch that connects the input to the bluetti only to the solar panel or only to the car outlet, and to the car output only if it is present. You can probably use a contactor or a heavy duty relay that is 12V and connect the NC contact to the panels, NO to the car, and COM to the bluetti. Add a capacitor to dampen spikes whenever the system switches and connect the grounds together. A bjt jank, and also have to check the relay ratings / coil power usage



  • Paint used for the images on the side of the glass had heavy metals (e.g. cadmium). As the paint flaked it became possible to ingest it. A mom who for some reason had an XRF gun (x-ray fluorescence, allows identifying element makeup of things. Useful for identifying material or ore content) and saw a ton of cadmium then went and reported it






  • Just searched my old user names and found absolutely nothing except for one post from 2012 on Minecraft forums

    It’s one part a lack of SEO/searchability and nine parts sites that are dead and gone taking that information with them.

    I haven’t been the best about backups, passwords, etc but I’ll probably set up a dead mans switch at some point to release my passwords to my family and delete my drives if/when I can’t do it myself. I’ve already got bro on call to drive to my house and shred the drives •=•