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I'm buying this Xbee chip.

But it only has 6 ADC pins and I have 12 sensors! Can I multiplex my 12 inputs? How hard is it to do this? I don't want to have to use 2 Xbee modules for power/cost reasons.

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You can use a CD4051 8-to-1 analog multiplexer and connect it to one of your analog channels, which will give you a total of 13 channels. You'll need 3 digital outputs to select the active channel on the multiplexer.

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  • \$\begingroup\$ Very useful. Many thanks. I'll look up the CD4051. \$\endgroup\$ – Eamorr May 31 '12 at 19:20
  • \$\begingroup\$ thanks very useful chip ? CD4051. How much it cost over there? \$\endgroup\$ – Standard Sandun May 31 '12 at 20:49
  • \$\begingroup\$ @sandundhammika, You can answer questions like that at findchips.com. \$\endgroup\$ – The Photon May 31 '12 at 23:19

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