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Issues with 74HC4051 multiplexer / demultiplexer (Project)

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Posted by Niccolo   (1 post)  [Biography] bio
Date Thu 12 Mar 2015 11:30 AM (UTC)
Message
Hello Gammon, I have spent the last few hours on your tutorial on the 74HC4051 multiplexer / demultiplexer and for some cases I found it very useful: it made me understand entirely how does this multiplexer work and how to wire it. But I might have missed something.

After wiring everything as you said, the project doesn't work. The Serial outputs a list of 8 numbers as it should, but they all are around 800-900 without any reference to the sensors. I tried grounding B & C as you suggest, and wiring only two sensors, but nothing changes.

I am using your exact code, taken from here:

http://www.gammon.com.au/forum/?id=11976

And I made a Fritzing scheme of my wiring but it seems I can't post it here.

Sorry to bother you but I'm really stuck.
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Posted by Fiendish   USA  (1,775 posts)  [Biography] bio   Global Moderator
Date Reply #1 on Thu 12 Mar 2015 07:24 PM (UTC)
Message
Template:Arduino Please post Arduino-related questions to the Arduino Forum or to StackExchange: Arduino. This saves splitting questions and answers between this forum and the Arduino ones.

https://github.com/fiendish/aardwolfclientpackage
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Posted by Nick Gammon   Australia  (21,675 posts)  [Biography] bio   Forum Administrator
Date Reply #2 on Thu 19 Mar 2015 07:31 PM (UTC)
Message
See reply #1 above.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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