amateur_24
Member
I have built myself one of the following circuits
For some reason when connect the 3V logic side to the rx pin of the due and the 5V logic to the tx of the uno it works. I can connect each board to their respective terminal then send messages to the uno.
However when I swap it the other way round i.e. the 3V logic side to tx of the due and the 5v side to rx of the uno, it refuses to work.
For transistors am using 2n2222 for both and I tried 9600 baud and 4800 baud. I get the same issue.
Why?
For some reason when connect the 3V logic side to the rx pin of the due and the 5V logic to the tx of the uno it works. I can connect each board to their respective terminal then send messages to the uno.
However when I swap it the other way round i.e. the 3V logic side to tx of the due and the 5v side to rx of the uno, it refuses to work.
For transistors am using 2n2222 for both and I tried 9600 baud and 4800 baud. I get the same issue.
Why?
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