I'm not sure why there is an extra battery in the plan unless the sensor needs a higher voltage to operate. As Eric says just keep the sensor output below the controller's Vcc and everything will be fine. I think the external DAC board has a 12 bit converter whereas the ATMEGA's internal ADCs are 10 bits, if that matters to you.
If you need it, I have a little break-out board for the 51-pin connector: http://www.etantdonnes.com/Motes/MicaBOB/ MS Eric Keller wrote: > I have used the ad channels directly on the Telosb motes. With the Mica > motes, > it's harder because of the connectors. I don't see why you can't do it though. > > Just read the manual for the processor chip and make sure to stay in the > limits. > Eric > > > On Tue, Oct 21, 2008 at 12:39 AM, Agnelo Silva <[EMAIL PROTECTED]> wrote: >> I saw many projects using a "data acquisition" board (like MDA-300) for >> external voltage readings. There are many scenarios that I would also such >> board. >> >> But, what I am wanting now in my project is something very simple and I am >> wondering if I really need to purchase such data acquisition board. >> >> Related to the project below, do you see any problem to make the voltage >> reading (0 to 1VDC) directly from one ADC input of the 51-pin connector of >> the MICAz or MICA2? Pros and Cons? > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@millennium.berkeley.edu > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
