ws2803 vs ws2812b- help-

Using Arduino General Electronics
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Hello, I need a driver with for led rgb. Such as ws2812b, which is the driver embedded in the led. But this driver is very slow.

I need a driver with speeds and features such as ws2803, spi, but the driver is inside the led.
Thank you.

datasheep . ws2803

Features
Applications
• Supports both constant voltage and constant current drive mode
• Programmable constant LED drive current
• Wide constant output current range 5~150mA
• Build in PWM dimming scheme for each output channel, supports free-run, especially suitable for low cost controller application
• PWM free-run capability(refresh rate(2.5KHz)
• Build in buffers to cascading data and clock to the next driver
• Output polarity reverse function
• Support hot swap
• Maximum input clock frequency 25MHz
• Power supply voltage 3.3~5.5V

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Wawa:
Overview | Adafruit DotStar LEDs | Adafruit Learning System

hi, What driver do you have?

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That page explains the differences between the slower neopixel LEDs and the faster Dotstar LEDs.
Leo..

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Wawa:
That page explains the differences between the slower neopixel LEDs and the faster Dotstar LEDs.
Leo..

Yes but it is very slow compared to ws2803

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Naruto128:
Yes but it is very slow compared to ws2803

Seems you have done the calculations. Why don't you post them.
Leo..

Edit:
Never worked with them, but datasheets state a max clock of 25Mhz for the WS2803 and 32Mhz for the Dotstar. They both need one byte per LED (or per colour).
Bottleneck could be SPI speed (8Mhz for a common Arduino), or data wire length.

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Wawa:
Seems you have done the calculations. Why don't you post them.
Leo..

Edit:
Never worked with them, but datasheets state a max clock of 25Mhz for the WS2803 and 32Mhz for the Dotstar. They both need one byte per LED (or per colour).
Bottleneck could be SPI speed (8Mhz for a common Arduino), or data wire length.

I will not use arduino one, I will use another faster

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??-?

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Naruto128:
??-?

What's that supposed to mean. You had an answer.

  1. the datasheets state that the dotstar LEDs are potentially 28% faster per LED channel than the WS2803.
  2. if you want to reach that speed, you need a 4x faster than normal Arduino, and very short wiring.
    Leo..
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Wawa:
What's that supposed to mean. You had an answer.

  1. the datasheets state that the dotstar LEDs are potentially 28% faster per LED channel than the WS2803.
  2. if you want to reach that speed, you need a 4x faster than normal Arduino, and very short wiring.
    Leo..

The APA102, is the same as the Dotstar LEDs. ?

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Yes, APA102 is dotstar, WS281x is neopixel.

Both of these controllers have been cloned by third parties as well.

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What differences are there between the APA102C vs APA102?

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There seem to be two versions of APA102 LEDs making the rounds (not counting clones) - one manufactured in China (the APA102C), which looks like the WS2812, and one manufactured in Taiwan, the APA102TW, which has a thermal pad in the middle, and nicer LED dies (particularly the red one, which is noticably brighter on the TW ones).

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