The DMX decoder adopts an advanced computer control chip, which receives the internationally widely used DMX-512 standard digital control signal and converts it into a PWM controller signal to drive LED: it can be connected with the DMX digital console, and the decoder can be added to continuously expand the output channel to achieve more dimming or various program change effects. When the decoder is not connected to the DMX console, the unit can be used as a synchronization controller to synchronize control multiple decoders and LEDs.