Archive for 11 May 2010

Serial Comm Ports for ever and ever… (Part 3)

Part 1, 2, 3, 4, 5, 6, 7, 8 Some of you may want to interface their custom Arduino based serial comm port. It is not as trivial as you may think! In reallity, a “low” logical level (0 V) must generate a -3 to -15 Volts signal on the Tx (Transmit) pin of the communication line! And a “high” logical level (5 […]