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 [...]
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 [...]
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 [...]
Why we need high PWM for the pixel led strip? When we learn the IC chip specs, we always note there are two important rates, one is named refresh rate, another important parameter is PWM rate. These two above rates can be important in certain [...]
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 [...]
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 [...]
Why need to add Power Injection for the addressable LED Strip? When we offer the power to the led strips, you always can see the brightness is dimmer than the leds near to the power supply when the led strips are more than 3m length, [...]
Pixel Protocol Overview: WS2815 This pixel protocol was designed by Newstar in China. WS2815 offers many of the benefits the WS28xx series is famous for. It uses 12V as its main power input for each chip, VDD, which is then dropped down to 5V inside [...]
Pixel Protocol Overview: WS2818 This pixel protocol was designed by Newstar in China. WS2818 offers many of the benefits the WS28xx series is famous for, as well as being the first in the series to support an output voltage of up to 24V, making it [...]
Reinventing the Classic MIDI Router
A fresh approach: featuring one button routing for each physical input and output, RGB HD107S LEDs, and OLED graphical display, everything can be easily setup without a PC. It will be the centerpiece of your studio!
Massive MIDI I/O: 11 inputs and 17 [...]
