This decoder can convert universal DMX512 signal into SPI signal, suitable for LED lights based onWS2801, WS2803 driving IC.
How to set DMX address via dip switch:
When FUN=OFF, Decoder is DMX controlling mode, When FUN=ON, Decoder is self-test mode
1. Set DMX512 original address
1. This decoder occupies 3 addresses, adopted Dip switch to set the address, the Dip switches from 1 to 9 are a kind of binary value coding switches used to set DMX512 initial addresss code, the correlative bits in the 1-9 bits of the DIP switch, the 1st bit is LSC, the 9th bit MSC,511 addresses totally
2. DMX512 initial address code is equal to the total amount of the Dip switches’ number from 1 to 9, press Dip switch downward(ON.: at position :”1”), user can get the number of its position, if pressing upward(at position”0”), the number of its position is 0.
2. Testing function:
LED Lights conjunction diagram:
Note: When use DMX512 protocol, In order to ensure the accuracy and stability on signal transmission. Need to weld a minitype metal film terminal resistor with 90~120Ω 1/4 W between 2 and 3 base (signal positive and signal negative) of each channel DMX signal cable’s most end according to DMX512 protocol specification. The volume of the impedance should refer to the manual of DMX dimming console you are using.
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