Hi, i'd like to connect a 5m / 150 APA102C led-strip to an arduino.

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1

Hi,

i’d like to connect a 5m / 150 APA102C led-strip to an arduino.

Should i apply resistors between the arduino and the strip (DATA, SYNC) and how big should they be, if they are useful? For the current i have a 5V/12A PSU.

Greetz Chris

2

You can try a resistor in the range of 200-470 ohm on the data line.
I’ve been using 470 ohm and place it on the end of the data line just before the LED strip.

3

Ok, thank you. In the Syncline isn`t a resistor necessary?

4

I’ve never used one on the clock line.

5

You can add 200 Ohm on data line - but I figured out, that the APA102 is much more stable then WS2812 ICs. So in most of the cases you do not need any low pass - because the noise is not that critical because of stable timing depending on the clock line

6

Thanks for this hint… great community!