In my continuing search to get temperature information into the computer at a reasonable cost I came across a neat thing called a multiplexer. I'm sure all of you know about them all ready :) but I'm a little slow in electronics. Anyway my thought is to use a multiplexer to get 4 thermocouples into one MAX6675. This would make the MAX6675 a much more attractive way to read temperatures. The big question is what multiplexer to use, there are thousands of them! On my prototype shield on the Arduino Uno I have one SOIC pad for the MAX6675 and one DIP area that can handle up to a 20 pin DIP chip. Googling for Arduino and multiplexer I came across one example that mentions using a 4051 chip. Doing a search on DigiKey for 4051 turns up quite a bit to pick from and after drilling down to 16 pin DIP packages a page full. Seems like most of the differences are on-state resistance, voltage supply source, voltage supply, current supply...
I also came across this package from down under that is doing the same thing using an ADG608 multiplexer. Searching for that on Digikey I see it comes in a 16 pin DIP package. I wonder if that would be a better choice? http://www.oceancontrols.com.au/KTA-259.html Any suggestions are welcome on picking one. Thanks for all the help so far on this. John Thornton ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
