thanks, but this LED needs data and clock to start. So I can power the LED with the power supply but I also need the clock and data with the duet

@dc42 I tried with the 2 parts of the LED strip

config.g

@dc42 @jay_s_uk Thank you for your messages.

I modified my firmware to light up only the first five LEDs, but unfortunately, it still doesn’t work. I tried this setup both using only the Duet and with the 5V power supply, but neither worked.

I am attaching my full machine configuration file, as well as some pictures of the setup, both with only the Duet and with the external 5V power supply.

Thanks in advance!

@jay_s_uk I'm reaching out to you again because I've tried many things, but I still can't get this LED strip to work.

First, I replaced T1 with T0, but it made no difference. Then, I tried powering the 5V only from the Duet and later tried connecting GND only to the Duet and then only to the 5V power supply.

I also tried swapping the Data and Clock connections, and finally, I repeated all these tests on the other end of the LED strip.

Additionally, I made sure my board is properly updated to firmware version 3.5.4 using the M115 command.

At this point, I don’t know what else to try. Any help would be greatly appreciated.

Thanks in advance!

@jay_s_uk oh yes thank you, i will try this.

@jay_s_uk I've tried, but it doesn't work. I don't understand why, can I try with other pins to find out if the problem is with the duet motherboard or the led strip?

@jay_s_uk Thanks, I will try tomorow.

Hello,

I have a DUET 6HC board that controls my CNC machine, and I want to add an LED strip to it.
For that, I bought an APA102 LED strip, which allows me to cut the strip and use both parts independently.

I connected my LED strip to the DotStar pins for GND, Clock, and Data. Since the LEDs require more power than the DotStar pins can provide, I am using a PC power supply for the power.

Here is my firmware configuration for the LEDs:

M950 E0 C"led" T1 Q3000000
M150 E0 R255 P128 S20 F1
M150 E0 U255 B255 P255 S20

I am running RepRap Firmware (RRF) version 3.5.0.

Problem:
When I start my machine, the LEDs stay off. However, if I unplug and then replug the connector on the Duet, the first LED turns on. Then, one by one, the other LEDs start turning on.

I have verified that I have 5V at the power supply output and that there is continuity of the 5V line across the entire LED strip.

Does anyone know what could be causing this issue and how to fix it?

Thanks in advance!