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AusChristmasLighting 101 Manual
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101 display basics
Which Pixels?
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[QUOTE="merryoncherry, post: 125693, member: 37249"] No disrespect [USER=32169]@TerryK[/USER] but this is all outdated. This was probably true of pixels of years past but it isn't true now. Maybe the GS8208 or another chip is the reason (I can't see any markings on the chip in the pixel). The fundamental assumption that resistors are more sensitive to voltage would appear to be wrong because of the constant current drivers (see test results below), and the regulators draw more current, so they drop the voltage more, which makes them far more sensitive. [B]The only advantage to regulated pixels is that they are brighter[/B]. The brightness and color of today's resistor pixels is more uniform across more pixels running farther from the controller than for the regulated pixels. "The greater the distance the more voltage drop one sees generally which then makes the regulated pixels more advantageous." This is false because the regulated pixels on the market use more power than the resistors, so they drop the voltage more at the same configuration. This is not hypothetical, I just tried it and took pictures for you :-D I have for your comparison today: Regulated 12V Bullets: Wired Watts regulators, delivered to me last month. Old Resistor-style: 12V HolidayCoro strawberry bulbs, delivered to me last October. (I don't have any old bullets, these'll have to do.) Modern Resistor: 12V Alling, delivered to me 2 weeks ago This first picture is 100 regulators, 100 strawberry, and 200 resistors at 12ft from the controller . Works well, as one expects. [ATTACH type="full"]19922[/ATTACH] Actually, maybe NOT as one expects. You can't run 200 regulators or 200 strawberries even that close to the controller without yellowing. Very noticeable yellowing of 150 regulators. [ATTACH type="full"]19923[/ATTACH] Very noticeable yellowing for 150 strawberries also (just like it says in the ACL manual). [ATTACH type="full"]19924[/ATTACH] With [B]300[/B] modern resistors, there is slight dimming but the color is actually pretty constant. [ATTACH type="full"]19925[/ATTACH] OK, so that proves that modern resistors exchange quantity for brightness, and are less susceptible to yellowing as the voltage drops, moreso than regulators. But what about the claim that they're better when far from the controller? That was only 12 feet. I'll add a 20ft extension, first the regulators: [ATTACH type="full"]19926[/ATTACH] That didn't work. They flickered violently because they pulled the ground up too close to the data signal voltage (see Keith Westley's excellent video about this at VCS 2020). Adding a signal booster and they'll run at 32 feet, but they'll yellow. [ATTACH type="full"]19927[/ATTACH] I'm done discussing the regulators now. Running 100 close to the controller, without PI, is the max for full white. The strawberries were quite usable at 32 feet. So I bumped it to 92 feet (this required a data signal booster mid span) and they do dim and yellow a little: (Attachment limit hit... to be continued) [/QUOTE]
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The title of our introductory lighting manual contains a three digit number. What is that number? Clue: Display basics forum
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