Very noticable how much more blah I feel ever since it became gray outside.
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Graham Sutherland / Polynomialreplied to Erin 💽✨ last edited by
@erincandescent hahahaha I was not expecting you to have actually bought a 35000 lumen lamp.
which one did you go with?
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Erin 💽✨replied to Graham Sutherland / Polynomial last edited by@gsuberland it's a 200W high bay lamp model by "Ledvion"with a Philips Xitanium Xi 200W driver mounted on the back that I intend to use as an uplighter (I also intend to connect a ZigBee dimmer to the 10v control lead)
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@gsuberland probably not the best CRI but certainly very good light output!
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@erincandescent @gsuberland +1 to the ledvion high bay lamps, we have two 100W ones to reduce SAD. Can recommend.
We're using a shelly 0-10v dimmer with it.
thread (needs login to view entire thread sadly): https://x.com/dekisu/status/1743679604601090200
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@erincandescent Oh; is it just a bright light? or does it do anything fancy
I saw this a while ago and keep wanting to try and build a compactified panel version of it with a large frenel lens
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@magicatgwen it's just a very bright light
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@ao @gsuberland I'm definitely going to have to do things slightly differently because this one's an absolute chonker with an M12 hook instead of M14 but we'll figure something out
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@ao @gsuberland I wonder if the 10v input is fast enough you could reasonably DMX Control it
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Graham Sutherland / Polynomialreplied to Erin 💽✨ last edited by
@erincandescent @ao ooh, @jaseg recently posted a really cool all-in-one DMX IC that might work here.
jaseg (@[email protected])
Attached: 1 image Found a candidate for #chipofthemonth just now: UCS512B3 is a WS2811-style #dmx LED driver in a smol little SO-8 that has 30V constant-current sinks for R, G, and B LEDs. Datasheet: https://suntechlite.com/wp-content/uploads/2023/07/UCS512B-IC-Datasheet-SuntechLite.pdf #electronics
chaos.social (chaos.social)
rather than using an actual LED string you could place a resistor divider between +12V and one of the OUT pins. changing the channel value over DMX changes the drive current, which will change the divider voltage. run the divider midpoint into an opamp to scale that to 0-10V, and an inverting unity opamp to get the other side of the differential line.
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Graham Sutherland / Polynomialreplied to Graham Sutherland / Polynomial last edited by
@erincandescent @ao @jaseg looks like those drivers also support DALI, so that might be the easiest approach
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Graham Sutherland / Polynomialreplied to Graham Sutherland / Polynomial last edited by
@erincandescent @ao @jaseg and looking at it, I think the 10V thing is just 1-10V, not differential.
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Erin 💽✨replied to Graham Sutherland / Polynomial last edited by@gsuberland @ao @jaseg not sure if this controller does DALI, but 1-10v current *sink* is pretty common on commercial fixtures
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@gsuberland @ao @jaseg I think this doesn't dim all the way to off though, so I'd still need a relay to kill it fully
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Graham Sutherland / Polynomialreplied to Erin 💽✨ last edited by
@erincandescent @jaseg @ao yeah, it's 10-100% dimming. not sure if there's a threshold where it just turns off at ~0V.
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Erin 💽✨replied to Graham Sutherland / Polynomial last edited by@gsuberland @jaseg @ao well shorting the control lines together seems to turn it off so do you think it's actually 0-10v control or by doing so am I gonna make the driver sad?
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@gsuberland @ao @jaseg "the ballast shall not be damaged when the control voltage V1,2 is between -20V and +20V"
Ok, pulling it down to zero is fine then -
@ao @gsuberland @jaseg so probably map things as
DMX 0 = 0v
DMX 1 = 1v
DMX 255 = 10V/floating
Plus maybe some logic can detect when the DMX is not being fed "interactively" (e.g. were dimmed to 0 & update rate is ~1/s) and throw a relay, if the ballast consumes too much power when dimmed to 0 -
@magicatgwen tbh I'm not sure I need a fake window, I just need more light in here
Especially because this house is well shaded -
Temporarily it's living on top of a shelving unit pointing up. It makes the ceiling above it uncomfortable to look at.
This might work?? -
@erincandescent photos?!