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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#41
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Laser Christmas outdoor projectors..
On Mon, 05 Dec 2016 07:17:01 +0000, Chris J Dixon wrote:
I just want something does a bit more than flash/fade simple sequences. I suspect it won't pass management approval what ever I do. I'd like it to do the simple "ordinary" things but also do something to make people notice and think "Hey! That's different". Personally I don't want any fast switching, I far prefer slow transitions and colour morphing, of which there seems to be limited availability. Agreed simple switching is boring, rapid simple switching distracting/annoying. All the commercial sets of lights we have have fade/slow transition mode(s) and yes finding such sets is not straigt forward. A decent "twinkle" is something I'd like. My 3 channel play set up isn't bad at that but could do with one or two more channels. Each channel switches on to full brightness for between 20 and 40 ms, then fades to zero over 150 to 300 ms followed by an off time of 500 to 1500 ms. Each of those settings is randomly selected every 15 seconds per channel and each channel sequentially changed every five seconds. Still want to play with a Raspberry Pi's and indivdually controlled RGB LEDs. you can set the brightness and colour of each LED at fairly high rate. But that is just strip of LEDS, bit boring. The 18 m 240 LED set is folded back on itself twice to triple the LEDs/inch and give the whole a bit more bulk. -- Cheers Dave. |
#42
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Laser Christmas outdoor projectors..
On Mon, 5 Dec 2016 08:02:40 +0000, Tim Watts wrote:
Hmm. I looked at the separate driver chip for the addressable, the WS2811. It does seem to show 1 LED = 5V supply and 3 in series = 12V, so that would explain some of the addressable tapes that have 1 pixel=3LEDs as the addressable element (being 12V tapes). Nearly, each pixel has at least 3 LEDs, red, green and blue. In the 5 V system that is all there is per pixel. In the 12 V system there are three LEDs in series per colour so 9 LEDs total. B-) However the control box must have some suitable switching and be microprocessor controlled so just hacking into that is probably easier. Prised it open, some chip that I can't find any reference for controling W2E SOT23 MOSFETs for the switching. -- Cheers Dave. |
#43
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Laser Christmas outdoor projectors..
On 05/12/16 15:26, Dave Liquorice wrote:
On Mon, 5 Dec 2016 08:02:40 +0000, Tim Watts wrote: Hmm. I looked at the separate driver chip for the addressable, the WS2811. It does seem to show 1 LED = 5V supply and 3 in series = 12V, so that would explain some of the addressable tapes that have 1 pixel=3LEDs as the addressable element (being 12V tapes). Nearly, each pixel has at least 3 LEDs, red, green and blue. Well - OK, I was counting an RGB unit as a single package, which it usually is in the tapes at least In the 5 V system that is all there is per pixel. In the 12 V system there are three LEDs in series per colour so 9 LEDs total. B-) However the control box must have some suitable switching and be microprocessor controlled so just hacking into that is probably easier. Prised it open, some chip that I can't find any reference for controling W2E SOT23 MOSFETs for the switching. |
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