Urs Hunkeler ha scritto: > Hi Francesco, > > Thanks for detailing your measurement setup. From the pictures I don't > see any additional circuit for your sensors. Do you use an internal > sensor? If not, do you have the problems when reading ADC values without > anything connected and you expect it to be constant (since nothing is > connected)? Just in case, I think the input value of the ADC signal is > not determined if nothing is connected, and as such you might very well > see some noise (no idea why different batteries would have a different > influence on this). > > How big is the noise you see? > > Cheers, > Urs
Hi Urs. Those photos are only examples and there is no sensor connected to show the connections of the oscilloscope or multimeter. They show only the configuration with the multimeter and with the oscilloscope for the measurements. However the mote is connected to the circuit composed by strain gauge, Weathstone bridge and Amp Op when I measured power consumption. Here two photos of the sensor node connected to the circuit: http://img89.imageshack.us/img89/9756/dsc0752w.jpg http://img262.imageshack.us/img262/7789/breakoutboardmontatamin.jpg Greetings, -- Francesco Ficarola <francesco.ficarola_at_gmail_dot_com> [GPG KeyID: 0xDBA99D92]
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