HOW MANY PRESSURE SENSORS??

[JSROOKS]

Dear TS,

How many pressure-temperature sensors can be supported on one Arduino board? I need to configure a board with as many sensors as possible (up to 5), that will record time and data to an SD card. Any thoughts would be greatly appreciated.

Thanks!

[Franklin97355]

Depending on the sensor that should be possible. Could you give more info, like which sensor you plan to use?

[rob drizzle]

as mentioned above... with out information about what you are planning on using for a sensor, it will be hard to help.

With that said, any of the smaller arduinos (non mega boards) you will have access to 6 analog input pins (I'm assuming that your pressure devices will need an analog to digital conversion). Great! right? you need to use five sensors and you will have 6 inputs. Well, if you use a real time clock, like the one sold here at Adafruit, you will need to devote 2 pins A4 and A5 to communicate with the clock that will be keeping time for your project. So you are back to 4 pins.

There are ways around this:

http://forums.adafruit.com/viewtopic.php?f=25&t=13722

But you are now getting into more advanced methods...

Or you could always buy a Mega with 16 analog pins...