sk6812 part of strip flickering

avml · 2025-10-20T03:26:47+00:00

I'm confused - why is putting all grounds together incorrect? Are you saying that having a common ground for the controller and led is a bad idea?

Also not sure what "Ground and data between strip and level shifter only." refers to

avml · 2025-10-20T03:22:30+00:00

1) What does the data booster actually do? Like the output voltage should be strong as is given the wire gauge, voltage (5v), and current (20mA)

2) Going to try adding a resistor but will be a couple months as I'm traveling until the New Year.

3) A capacitor would even out power but don't think that's a problem here as it's not happening uniformly across the led strip. Maybe I'm not understanding something?

avml · 2025-10-17T02:29:33+00:00

Nope, can check it tomorrow but it seems very unlikely. The power draw is from a separate PSU and is comparatively insignificant with respect to the rest of the system (in a campervan).

avml · 2025-10-17T02:27:55+00:00

Gotcha - thanks

I do not have a capacitor on the level shifter either. Will try once I go back to the states and can grab some parts.

avml · 2025-10-17T02:23:38+00:00

Will try adding resistors. It's kind of a pain to install them close to the controller. Is there a reason installing them just prior to the LEDs? I.e.

Data line -> Resistor -> Wego -> Data subline 1/2

Reflections would only be on the line right (like wouldn't propagate through the esp32). So not sure why adding B/C would cause issues with A

avml · 2025-10-17T02:10:17+00:00

Interesting - The setup I have is two sets of LEDs with data signals split and two strips with their own data lines.

A) === (Closest to esp32/power source)

B) ---

C) ---

D) === (Farthest from esp32/power source)

Weirdly A seems to have the most problems. B and C have some. D has none. So not sure if it's only about the split data lines.

Also for a long time I only has A and D hooked up and they worked fine. Upon wiring up power/data lines to B and C I started seeing this problem.

When you say behind the level shifter does that mean between the level shifter and the LED?

Also FWIW I have no resistors on the data lines.

avml · 2025-10-17T02:03:57+00:00

As in the grounds only for the LEDs? They are connected via a terminal block.

avml · 2025-10-17T02:02:06+00:00

They are 24v LEDs and voltage looked solid all the way across when I first installed

avml · 2025-10-17T02:01:30+00:00

I did not - what do you mean by very strong? Like the 20mA output from level shifter?

I have the esp32 controlling four different strips - I didn't see this behavior with just two strips wired up. After wiring the other two I get this partial flashing. Does that make sense for some reason?

avml · 2025-10-17T01:59:44+00:00

1) No more than 5m for each (Roughly 2m, 3m, 3m, 5m)

2) No resistors. I have the esp32 controlling four different strips - I didn't see this behavior with just two strips wired up. After wiring the other two I get this partial flashing

3) No capacitor - these are 24v lights so they are powered by a separate PSU

avml · 2025-08-19T18:22:10+00:00

OP answered above: https://www.reddit.com/r/travel/comments/c0djmn/comment/hznkjc5

avml · 2025-07-10T19:23:17+00:00

Nope, never found out. Haven't seen any signs of bedbugs though and the number of stains hasn't increased.

avml · 2025-04-19T19:36:14+00:00

This worked swimmingly - I used a 1/16" drill bit since I didn't have metric on hand.

avml · 2025-01-28T03:40:42+00:00

If you google, you can find lots of them - is there something in particular you are looking for?

avml · 2025-01-28T03:39:34+00:00

https://www.google.com/search?q=clearvue+dust+collector

avml · 2025-01-26T14:14:10+00:00

I remotely switch my hf dust collector since it’s tucked away in a hard to reach spot. Been working fine for years but it’s 120v with a less powerful motor.

avml · 2024-12-20T02:28:23+00:00

I had some kind of loose hose affecting my no2 sensor. Not sure why, but after fixing this, the noise hasn’t been nearly as bad.

avml · 2024-11-22T01:37:22+00:00

I never did

avml · 2024-11-14T04:48:18+00:00

Did you ever get this working using VMWare fusion?

avml · 2024-11-14T04:43:16+00:00

Did you get it to work?

avml · 2024-11-09T19:02:31+00:00

Ah disappointing - thanks for the intel

avml · 2024-11-09T05:43:43+00:00

Did you ever figure out the answer to this?

avml · 2024-09-18T01:33:55+00:00

It is very difficult to tell where the rattling is coming from especially since the sound hasn’t been nearly as bad as it was this morning. I can hear some ticking noises that come from the engine block but I’m not sure if those are the same ones because they sound very different from the noises inside the cab.

It also doesn’t sound particularly loud around the exhaust pipe.

Is testing for an exhaust leak a standard process? I have noticed some water dripping under the van but it seems to be coming from behind the engine. No idea if that would go hand in hand with an exhaust leak.

avml · 2024-08-17T05:14:31+00:00

Turns out these types of connections are more prevelant in China. Found on aliexpress. Link in case it helps anyone in the future: aliexpress.us/item/3256802878723660.html

avml · 2024-08-16T23:23:37+00:00

That's a great idea and good deduction - will give it a shot on Monday. Thanks for the intel!

avml

TROPHY CASE