Do you know the difference of HD107s, HD108, APA107, APA102 and SK9822?
APA102: 20+ kHz PWM, 8bit 256 grayscale
APA107: 9 kHz PWM, 8bit 256 grayscale
HD107s: 27kHz PWM (the upgrade of APA107), , 8bit 256 grayscale
HD108: 27kHz PWM, 16bit 65536 high grayscale
SK9822: 4.7 kHz PWM, 8bit 256 grayscale
Newstar study the APA107/HD107S/HD108 based on APA102 technology, so APA107, HD107S and HD108 are same protocol with APA102, same pcb/same controller, can replace APA102 directly.
And APA107 is better than SK9822, but almost same cost. HD107S is much better APA102, but the cost is cheaper. HD108 it is unique, 16bit 65536 high grayscale, no competitors.
HD108 pixel led chip with PWM refresh Rate 27KHZ and transmission rate 40MHZ, 16bit 65536 high grayscale.
HD107s pixel led chip with PWM refresh Rate 27KHZ and transmission rate 40MHZ, 8bit 256 high grayscale.
Apa107 pixel led chip with PWM refresh rate 9KHZ and transmission rate 30MHZ
New Taiwan APA102 pixel led chip with PWM refresh rate 26KHZ and transmission rate 30MHZ. (after Newstar tested, new APA102 is really bad product.)
Apa102C (made in china ) (fake apa102, seems SK9822)
sk9822 pixel led chip with PWM refresh rate 4.7KHZ and transmission rate 15MHZ (clone old APA102).
Below picture is 60LEDS HD108 and APA102 LED Strip, we set white color for bother led strip.
So you can see the APA102 LED strip, after 1.5m the LEDs is beginning turn to red, no signal transfered, so really high voltage drop. For HD108 led strip, all 5m work well, one the end with a little voltage drop, but signal was still transfered.
