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Topic: isolating serial lines with transistors? (Read 412 times) previous topic - next topic

Jin

I want to be able to use the hardware serial lines with a device, but only when I drive pin 2 high. Otherwise, I want the serial device to be effectively disconnected from the Arduino serial pins. Is it possible to do this just using transistors?

Grumpy_Mike

Yes you could do it with transistors but it is much easier using a 4051, see:-
http://www.arduino.cc/playground/Learning/4051

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