Low output fps, random blinking

[d0uble-b]

Hi! I bought a new power supply as you suggested. And i have issues yet. I have low fps output and only the first 7-10 LEDs blinking randomly. The service starts with the system But when i go on mlsc dashboard and select the device and any effect, then nothing happens, all leds are white on the strip. I restarted service and nothing happens. I send ny config. I hope you can help me.

d0uble_b

Config

[TobKra96]

Hi, what is written on the signal pin of the LED Strip? Di or Do?

Have a great day!

[d0uble-b]

Di

[TobKra96]

Ok, good.

You can try to test the output with this script here: https://github.com/jgarff/rpi_ws281x/blob/master/python/examples/strandtest.py Download it and execute it with sudo python3 strandtest.py Ensure MLSC is no running in the background. If this works, we have to dig deeper into the software. If this does not work, I would take a deeper look at the hardware setup.

Maybe it is a loose connection. Breadboards and stranded wires can cause bad connections. Do you have other cables, or can you solder them together for a test?

I tested the setup with the same type of poti, you have. It worked for me. You can drag and drop pictures directly inside the post.

[d0uble-b]

Hello I think the problem was caused because my raspberry was dying. Unfortunately it happened. I just tried to turn on and its not worked. I tried all tips what i found on topics and forums but i think its hardware error. So i bought a raspberry pi 4 2gb ram edition and the mlsc worked perfectly like in your video. Thank you for your help and your time. I am sorry but i didn't know about the raspberry's critical error.

I will post some pictures about my project when it will be done.

[Polar19]

Hallo, ich habe das Problem das mein Led Strip auch die ganze zeit blinkt, aber ich weiß nicht woran das liegt. Ich benutze einen Raspberry 4 mit 4gb ram und ws2811 strips

[d0uble-b]

Use only one usb slot. Use only the microphone. / Brauchen nur eine usb für mikrofon. Lässt andere usb frei.

[Polar19]

i use only one usb port for the microphone, but it dont work.

[Polar19]

the led strip flickers a lot. i tried everything with the potentimeter but i dont have any success with that

[d0uble-b]

Did you plug the ground cable into the raspberry?

[Polar19]

yes

[d0uble-b]

Check the program. Watch the output. My raspberry not always knows my sound card so i have to replug it and restart the program or the pi. Do you get the error message in the console?

[Polar19]

my microphone works but the led signal not really

[Polar19]

i dont get any error message

[TobKra96]

Hi, just a short summary: LEDs just flickering, no solid signal.

• Do you use a resistor between the GPIO Pin of the raspberry pi and the LED Strip?
• Have you tested the example script at the top? Does it work? If not, there is a hardware issue.
• Can you share with us some pictures of your setup?

Have a great day! TobKra

[Polar19]

1. yes i have a potentiometer between the raspberry and the led strip
2. no i dont tested it with the script, but a day ago it works and it dosent work

[Polar19]

https://user-images.githubusercontent.com/80054675/110019989-56e65980-7d29-11eb-9d73-d2f218598357.mp4

[TobKra96]

Ok, have you tried to adjust the poti value? Please try the example to differentiate between a hardware issue and a software issue. https://github.com/jgarff/rpi_ws281x/blob/master/python/examples/strandtest.py

Which gpio pin do you use? Wich Power Supply do you use? LED Strip and Raspberry Pi share the ground connection?

[Polar19]

i have connected the raspberry to the ground of the led strip and i use the gpio 18

[Polar19]

i tried to adjust the poti but it dont work

[Polar19]

how i can test? just copy and paste the code in to the console?

[TobKra96]

create a new file with nano strandtest.py copy paste the content of the file, adjust the values you need to and execute the script with sudo python3 strandtest.py

[Polar19]

[Polar19]

[Polar19]

there are two differnt sample rate numbers

[Polar19]

which is right 44100 or 41000

[TobKra96]

You have to use the sample rate of your mic. Do you have discord? Maybe I can support you with a shared screen.

[Polar19]

yes

[TobKra96]

Please use the server: https://discord.gg/qfmDu9jnce

[TobKra96]

Polars issue was fixed by using another power supply.

[ACyberCat]

Hello I think the problem was caused because my raspberry was dying. Unfortunately it happened. I just tried to turn on and its not worked. I tried all tips what i found on topics and forums but i think its hardware error. So i bought a raspberry pi 4 2gb ram edition and the mlsc worked perfectly like in your video. Thank you for your help and your time. I am sorry but i didn't know about the raspberry's critical error.

I will post some pictures about my project when it will be done.

Are you really sure it's a hardware error and there's no way around it except for buying a new pi?

My RPI 3 used to run mlsc perfectly and one day after a clean reinstall it did the same thing, low output fps with random blinking.

I tried isolating everything till i was left with a 16 led strip running off of RPI power and the exact same issue persisted with no workaround in sight.

Getting my hands on a new pi is near impossible where I currently live due to inflation, so if there is a way around this issue please help me solve it.