Do you know the difference of APA102, APA107,HD107s and SK9822?
APA102: 20+ kHz PWM.
APA107: 9 kHz PWM.
HD107s: 26+ kHz PWM (the upgrade of APA107).
SK9822: 4.7 kHz PWM.
Newstar study the APA107/HD107S based on APA102 technology, so APA107 and HD107S is same protocol with APA102, same pcb/same [...]
LEDs come in lots of different shapes and sizes. For Analog digital LEDs, where the whole strip becomes a single color, choice is mostly about the size, wattage and density of the strip. For digital LEDs it’s also important to make sure you get [...]
WS2182: 1-wire interface, fixed 800khz data rate, 400hz PWM rate, power draw up to 40mA/LED
SK9822: 2-wire interface, variable up to 16Mhz data rate, 4.7khz PWM rate, power draw up to 40mA/LED
HD107s: 2-wire interface, variable up to 40Mhz data rate, 27khz PWM rate, power draw [...]
Pixel Protocol Overview: WS2813 This pixel protocol was designed by Newstar in China. WS2813 offers many of the benefits the WS28xx series is famous for, as well as being the first in the series to offer both a redundant data line and a much higher [...]
Below is one real tested for 144leds HD107S and 144LEDs APA102. You can see obviously voltage drop for APA102 after 30leds, after 0.5m no signal and all leds turn red. for hd107s, only the end has a little voltage drop. also HD107S is brightness [...]
Pixel Protocol Overview: WS2814 This pixel protocol was designed by Newstar in China. WS2814 offers many of the benefits the WS28xx series is famous for, as well as being the first in the series to offer an RGBW design, making it one of the most [...]
Pixel Protocol Overview: HD107SHD107S is very similar to the APA range and boasts everything APA102 brings, with a higher PWM rate and brighter LEDs. The control circuit and LEDs are integrated in a 5050 SMD package, which provides a small physical footprint for each pixel.
PixLite Support
Are [...]
According to Paul Stoffregen’s Articles on December 6, 2017December 7, 2017, we know the APA102 LEDs strips have the problem at 24 MHz, usually after 150 to 250 LEDs.
But why? Here’s his attempt to investigate:One tempting explanation is signal quality problems due to horribly messy unterminated [...]
Comparison LED Strips: WS2812B, SK6812, APA102, HD107S
All LEDs are SMD5050 to compare (they also have 3535/2020/1515 size). There are RGB and RGBW variants for some of them (W of RGBW is used for an additional white LED 3000k/4000k/6000k CCT).
These LEDs fall into two categories:WS2812B, SK6812:3wires [...]
Pixel Protocol Overview: APA107
This pixel protocol was designed by Newstar LED in China, who use the 107 chip by Newstar. Very similar to the APA range, APA107 boasts everything APA102 brings, with 9Khz PWM rate and brighter LEDs. The control circuit and LEDs are integrated in [...]