Help with accelerometer.

[Lafleur]

Ok, here is a push in the right direction:

To connect up the boards: Use the standard 3 wire servo cable and solder the male (pin end) direct into the accelerometer board... The edge of the board is ground or the black wire...(Check the drawing for the board to make sure!!!) You will need three cables if you want all three axis.. Use a low wattage solder iron and be careful....

Now, just plug them into the AtoD inputs on the analog board... One each for X-Y-Z for a total of 3 AtoD channels. The cable will plug directly into the 3 wire input on the AtoD sidecar with out any modification. Make sure you check orientation of the connector when you plug it in.

This is also true for the rate gyro.. one for rate and the 2nd for temperature

To use the data, you should filter the data, then integrate the accelerations over time to find velocity in X or Y.. This can also give you the direction of travel...

The accelerometer output is about 1.5V steady state and +- .3 volt per G up to a max of 3g ie: moving forward (X+) at 1g you would get 1.5v +.3 v = 1.8volts, moving in reverse (X-), it would be 1.5v - .3v or 1.2volts... see the data sheet for precise information.

see: http://www.glenbrook.k12.il.us/gbssc...Kin/U1L1e.html
and: http://www.math.ucdavis.edu/~hass//C...ts/node25.html
http://www.glenbrook.k12.il.us/gbssc...Kin/U1L1d.html


see the data sheet on the First web site...

http://www.usfirst.org/uploadedFiles...%20Rev%20B.pdf

http://www.usfirst.org/uploadedFiles...ier%20r0.1.pdf

http://www.usfirst.org/uploadedFiles...%20Carrier.pdf


tom lafleur
mentor team 812
The Preuss School at UCSD