WS2811, WS2812B or SK6812? Choosing addressable (pixel) LEDs

Addressable LEDs, often called pixel LEDs, let one controller set the colour of every LED on a single data wire. They are used in decoration lighting, signs, displays and maker projects. Three names come up again and again: WS2811, WS2812B and SK6812. They share the same idea but differ in voltage, wiring and colour channels.

You can see LEDs and LED boards we keep in LEDs and displays. To buy pixel ICs or LEDs in quantity, send the part number and quantity through post your requirement.

WS2811: a driver IC for 12 V pixels

WS2811 is a driver chip. It sits next to separate LEDs and controls them. Many 12 V pixel strings and strips use one WS2811 to drive a group of three LEDs, so the smallest unit you can set is that group, not a single LED. Running at 12 V means less current for the same light, so long runs lose less voltage along the wire.

WS2812B: the driver inside the LED, at 5 V

WS2812B puts the driver inside a 5050-size RGB LED. Every LED is its own pixel, so you get fine control, which suits matrices and effects. It runs at 5 V, and at full white each LED can draw tens of milliamps, so long strips need power fed in at several points.

SK6812: similar, with an RGBW option

SK6812 is very similar to WS2812B in size and data protocol, and is often used as a drop-in alternative. It is also available as RGBW, with a separate white LED, which gives a cleaner white and warm-white shades than mixing red, green and blue. RGBW needs a controller and software that send four channels per pixel.

Wiring and power

• Data goes in one direction. Connect the controller to the "DIN" end, not "DOUT".
• Keep the data wire short from the controller to the first pixel, and share ground between controller and LEDs.
• A small resistor in the data line (a few hundred ohms) and a large capacitor across the power input at the start of the strip are common good practice.
• A 3.3 V controller such as an ESP32 often needs a level shifter to drive 5 V pixels reliably.
• Size the power supply for the brightest setting you will use, and inject power along long runs.

Which one to pick

• Long outdoor runs and decoration: 12 V WS2811 strings or strips, because of lower current and voltage drop.
• Fine effects and matrices close to the controller: WS2812B or SK6812 at 5 V.
• Good whites for interiors: SK6812 RGBW.

Common questions

Can I mix WS2812B and SK6812 on one data line?

Often yes for RGB types, because the protocol is similar, but test first. RGB and RGBW pixels cannot share one line without software that handles both.

Why do the colours go wrong at the far end of my strip?

Usually voltage drop. Feed power at both ends or every few metres, and check that the supply is large enough.

Do I need a level shifter with ESP32?

Many setups work without one, but a level shifter makes 5 V pixels reliable, especially with longer data wires.

Do you supply pixel ICs and LEDs in bulk?

Yes. Send the part number, voltage and quantity and we quote one INR price with a GST invoice.