Connecting an addressable LED strip (WS28xx)

WS2811-WS2818 addressable LED strip series is often used to implement full-color illumination using dynamic lighting effects. This solution was used in dynamic lighting of stairway, interior, facade and landscape lighting.
The data transfer protocol provides individual control of the color and brightness of each LED or group of LEDs (pixels) in the strip. It should be noted that lighting devices of this type can be implemented in the form of individual point pixels and powerful lamps connected in series by a cable. The control signal is also transmitted sequentially from one pixel to another (there is a mark in the form of an arrow on the strips, indicating the direction of the signal). In addition, as a rule, the contacts have DI (digital input) and DO (digital output) markings, which make it possible to correctly connect individual segments of the strip.
In addition, it should be noted that, on the one hand, this sequential signal transition greatly simplifies the connection of the strip sections among themselves, on the other hand, in the event of a failure of one of the LEDs, no control signal will be sent to all subsequent LEDs. This problem has been partially addressed in the WS2813-2815 LEDs by adding a backup cable to bypass the defective pixel.
In the line of controllers of the Atom series, the output for controlling the address strip is implemented using a replaceable ALC module as part of the Atom Hydrogen controller or 1U Extension WS.


The advantages of using the WS28xx interface are ease of use and connection. The connection is made with a simple two-wire cable (preferably shielded), the type of tape, the number of LEDs and the number of segments must be specified in the controller output settings. Learn more about configuration - 🔗 Address strips configuration.
The digital interface provides data transmission with a signal amplitude of up to 3.3V, therefore, in order to improve interference immunity, it is advisable to use a shielded cable of the minimum possible length for connection and mount it at a sufficient distance from power cables or other sources of electromagnetic interference.
5, 12 and 24V strips and pixels are currently available on the market. Pay special attention to this parameter when connecting


To better understand the use of different types of cables, the table shows the most typical examples:

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