:idea:,thank all friend , I did following your direction that I sampled signal from ADXL sensor 1000 times and take a Averaged value .But the value I receive consider not changing it's about 1.20Volt ->1.21Volt on all conditions I tested. Even In moving condition , It is still 1.19->1.21 volt.So I can't terminate which level on voltage I receive respond with acceleration X =1g and -1g . In 2 those conditions the Level Voltage value of it stil 1.20->1.21 volt.
Why? And which problem have met? And how to solve that problem?
:idea: give me some Idea to solve it
thank