I need to connect eight 5 Volt ttl serial rfid readers onto the tx/rx pins. Has anybody got any examples of this being done? or any suggestions for suitable chips to make the job as simple as possible.

Multiplexing serial tx/rx lines

MarkT March 11, 2012, 2:09pm 4

Why trawl datasheets when wikipedia has a list of the 74 series functions?

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