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Old August 29th, 2019   #14
Task Group Member
Join Date: Aug 2008
Posts: 369

Your English is better than my (non-existent) Portuguese. What you wrote was perfectly understandable, so you don't need to apologize.

Yes, it's possible to build a splitter without a microcontroller. You'll need a lot of one-shots and a state machine to handle the edge detection.

I strongly recommend including glitch filtering to improve noise immunity. The shortest valid high or low in a properly functioning RDM line is 4 microseconds. Thus, any pulse on the line that's shorter than 1 to 2 microseconds is noise and should be ignored. Doing this requires more one-shots and a delay line.

Given the complexity of the state machine, it's probably easier to do it in a PLD or small microcontroller, but it can be done without these if needed.
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