How to interface multiple NTC Thermistors to a 8-1 multiplexer and then to myRIO .

[bakry77]

 I need to measure the temperature of 8 lithium ion battery cells in series individually for my battery management   system . So I need to see how can I interface the 8 thermistors with 8 to 1 multiplexer and output to myRIO analog input.

[JefeL]

There are many 3rd party products on the market that can handle the multiplexing. Once you source the right multiplexing solution you can use 3 digital outputs to select what channel you want to measuer on the analog input.

[Kristoff2]

Hey Bakry77,

To expand on what Jeff said you can use an analog multiplexer like this one:

http://www.digikey.com/product-detail/en/HEF4051BP,652/568-1689-5-ND/763293

http://www.nxp.com/documents/data_sheet/HEF4051B.pdf

The 8 thermistors will need to be connected to Y0-Y7 and the myRIO analog input to Z.  Then you can use 3 digital outputs from myRIO connected to S1-S3 to select the channel (Y) to pass through (Z).

Let us know if you have more questions about this.  I'd love to see the code and your system when you get it working.

Thanks!

-Sam K

LabVIEW Hacker

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