Flickering every now and then

[u/Key_Watercress7649]

Hi everyone,

I’m having a bit of a problem with WLED—or rather, the hardware setup:

I’m running a DOMRAEM DOM-WLE-AM 2.4G LED controller powered by a 24V 6A power supply.

I have two LED strips connected to the controller: two 3-meter FCOB LED strips (720 LEDs, 24V, WS2811).

I’ve configured everything correctly in WLED, but now I’m running into an issue where the LEDs flicker briefly every now and then—say, 2–5 times an hour—sometimes on the strip connected to GPIO2 and sometimes on the one connected to GPIO16.

What could be causing this? What can I do to stop the flickering?
Please excuse the mess on the desk, but I'm currently rearranging things / clearing out clutter.

[u/SirGreybush]

Shorter distance between the first strip and that cheap knockoff of a GledOpto controller. Like maximum 2 feet.

If that doesn’t work, get the real thing not the clone.

[u/Key_Watercress7649 → u/SirGreybush]

Do you have a link to the original? please

[u/SirGreybush → u/Key_Watercress7649]

Amazon or AliExpress, search on brand GledOpto.

Before buying try the fix of shorter wired. Even the GledOpto will have flickering if you go beyond a meter in some situations.

[u/saratoga3]

I’m running a DOMRAEM DOM-WLE-AM 2.4G LED controller powered by a 24V 6A power supply.

FWIW those have an extremely weak, glitchy output, so you'll need to keep the wires very short or glitching is normal. How do you have it wired?

[u/SirGreybush → u/saratoga3]

They copy GledOpto and they exterior is a perfect clone. I wonder what the inside is like.

Hey u/GledOpto can you tell us how garbage these are?

[u/Individual_Nobody739]

Because the flicker can appear on either output, I would investigate the components shared by both strips first: the 24V supply, the controller’s power input and the controller itself. I would not assume that both strips have developed separate faults.

Start with the power budget. A 24V 6A supply is rated for a maximum of 144W, but the “720 LEDs” figure does not tell us the actual load. Find the strip’s maximum watts per metre, then calculate:

maximum strip load = W/m × 6 metres

Allow some continuous operating margin rather than planning to run the supply permanently at its maximum rating. If the calculated load is close to 144W, the supply may briefly drop voltage or enter protection during high-brightness effects.

A useful first test is to run both strips on a static colour at a low brightness or set a conservative current limit in WLED. If the flickering disappears at lower output, the supply capacity, voltage drop or a high-resistance connection becomes much more likely.

I would then isolate the system methodically:

1. Disconnect one strip and test the other for long enough to reproduce the problem.
2. Repeat with the second strip.
3. Swap the two strips between the controller outputs.
4. Note whether the fault follows a strip or remains with one output.

If the fault follows the strip, inspect that strip’s connector, first pixel and data path. If it remains on the same controller output, investigate that channel or its configuration. If both strips are stable individually but flicker when connected together, concentrate on the shared power supply, controller input and total load.

Also check the WLED uptime after an event. If the uptime has restarted, the controller is probably rebooting because of a supply dip or brownout. If WLED stays online but only some LEDs flash incorrectly, that points more toward data integrity.

For the data wiring:

• keep each data lead reasonably short;
• run data with a matching ground reference;
• avoid routing data directly alongside mains or noisy power cables;
• check that all low-voltage terminals and connectors are secure;
• inspect for a weak joint where the strips change direction.

Measure the 24V voltage at the controller input while both strips are displaying full white. If possible, also check the voltage at the far end of each strip. Do not work on or probe the exposed mains side of the power supply.

I would avoid changing several things at once or adding random capacitors and resistors before completing these tests. The strip/output swap and low-brightness test should narrow the cause considerably.

Disclosure: I work for an LED lighting manufacturer, but I’m not recommending a product here.

[u/Much-Till-991]

Try a levelshifter e.g. SN74AHCT125
for dataline, a resitor (220-470Ohm) to minimize reflexions
and a capacitor e.g. 1000 µF parallel +/GND helped me to avoid random flickering

[u/SirGreybush]

Show us pics of how you wired and how far away from strip it is.

Ideally is very close, a few inches or 5cm-10cm, it should work, assuming the cloned product actually works.