thx for this. btw: you don´t know by chance where i can find an rs485 to ttl circuit using the max489 (i´m having an sensor working with rs485 and want to connect it to the arduino)? somehow i can only find some for rs232 to ttl...
...that was actually what i was looking for. the connection is half-duplex and probably won´t be multi-drop...and i´d have a question, if i don´t bother: when using the max489 for a single connection, does it make sense to connect A&Y and B&Z? i found a circuit in the net doing this, and now i wonder if it is some safty thing or stuff...
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