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Joined 2 years ago
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Cake day: June 13th, 2023

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  • Hosting NSFW content is an absolute ball-ache, so a lot of instances that are not NSFW focussed do not host it.
    In the early days of feddit.uk, we decided to go the path of SFW, to simplify things.
    I absolutely salute the lemmy-nsfw admins in taking that load on.
    And it makes a lot of sense: If you’re going to deal with the headaches, you might as well focus entirely on them!


  • Maybe the best way to think about it is not dark, but the absence of more light.
    On a DMD projector, we use tiny micromirrors for each pixel which flash thousands of times per frame of video.
    The flash/no-flash ratio decides how much light makes it out of the projector. This gives us over a thousand light levels per colour channel, from near dark, to full light.
    When the mirrors are not in position, the light output is very low. (1/1000th of the full output, on a projector with a static 1000:1 contrast ratio)

    The screen is designed to reflect light well, which means in a non-perfect room, it will have a light floor of the reflected ambient light, plus whatever still makes it through the projector (as Cygnus mentioned, room treatment).

    If you do treat a room well enough that the small amount of light that makes it through the projector at all-off is a problem, you can do things like fitting an ND filter to the lens (reducing the full light output, while also reducing the minimum).
    Or you can use the dynamic iris fitted to some projectors (which reduces the amount of light being put out based on the overall scene illumination, similar to the way LCD TVs lower the backlight level to “reach” contrast ratios of 100000:1).











  • Ah, I meant I didn’t want to feel like I was condescendingly explaining things to people who already knew.

    It’s free software, and supports a lot of things.

    Homeassistant can be run completely locally. The on an old pc, raspi, or even a virtual machine when you’re trying it out.

    Operation wise, you can use a browser, or the app for added functionality (for example, it can log the battery level of your phone)

    And with the various sensors and devices you can build up automations.
    So, for example, when phone battery is below 20% at 10pm, flash the bedroom light to remind you to charge.

    They even have a demo based on a fake house on their website for looking at.

    The only physical thing you’d need otherwise is a zigbee dongle (£20-ish).


  • You’ll need to have a zigbee radio on a HomeAssistant instance (maybe possible with other software).
    And on HomeAssistant, run ZHA (or similar) with the zigbee radio.
    Sorry if that’s teaching to suck eggs, just wanted to clarify.

    If you’re already set up with that, it’s just a case of deleting a bulb from the Hue bridge, and searching for it using the zigbee integration. Once it’s deleted from Hue, it will go into pairing mode. You may need to power cycle the bulb if it does not appear in the search within 10s.

    HASS was able to support my white/ambiance bulbs and colour bulbs without any issues. In fact, it responds faster. The only downside is that they don’t so much fade, as jump to a new value. The update frequency is about 2 times per second.