# Athom WLED & UCS1903 5050 LED strip: only 3 leds on

**URL:** <https://wled.discourse.group/t/athom-wled-ucs1903-5050-led-strip-only-3-leds-on/13168>\
**Category:** Issues\
**Created:** [November 3, 2024, 4:17pm UTC](https://wled.discourse.group/t/athom-wled-ucs1903-5050-led-strip-only-3-leds-on/13168 "2024-11-03T16:17:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ktk](https://avatars.discourse-cdn.com/v4/letter/k/35a633/32.png) [@ktk](https://wled.discourse.group/u/ktk)\
**Post date:** [November 3, 2024, 4:17pm UTC](https://wled.discourse.group/t/athom-wled-ucs1903-5050-led-strip-only-3-leds-on/13168/1 "2024-11-03T16:17:24Z")

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Hi everyone,

I try to get an older LED strip to work. It’s a 150 LED strip with UCS1903 ICs on it, which seem to be WS281x compatible from what I googled. It’s 12V and I have a 12V 2A power supply. I use Athom WLED as board. The strip does have a “direction”, I connect it accordingly.

I configured 150 leds in the board and selected WS281x.

Result is that the first 3 leds are slightly on in red & flicker a bit. If I gnd the data line, the other 147 LEDs get bright green (much stronger than the red), which seems to be the default when I just give power and no data.

Any ideas of what I’m doing wrong here?