The MMA7361 is a unique accelerometer in that its outputs are analog signals. Each of the three axes (X, Y, Z) have their own dedicated output pin. Connect these to the analog inputs of your Arduino or another controller to measure the acceleration value.

The MMA7361 is a 3.3V device but this board includes an on-board voltage regulator which allows you to power it from 5V as well as 3.3V.

PRODUCT CONTENTS:

• 1 — MMA7361 3-Axis Accelerometer module

FEATURES:

1. 3-axis micro-capacitive acceleration sensor
2. On-board voltage regulator allows for optional supply voltages up to 7V
3. Two selectable range options: ±1.5g or ±6g. Selectable using the module's GS pin
4. Breadboard compatible pins
5. Sleep mode easily enabled using the module's SL pin (pull low to enable sleep)
6. Built in self-test abilities. To use the self-test, hold module upside down to put a force of -1g on the Z-axis and pull the ST pin high to initiate self test. The self-test feature of the MMA7361 then applies an electrostatic force to each axis to cause it to deflect. The Z-axis is trimmed to deflect +1g, which you can measure on the Z pin. This feature can be used for calibration (refer to datasheet)
7. Signal conditioning with low pass filter
8. 0g-Detect for freefall detection. The 0G pin will go high when 0g is detected on all 3 axes

SPECIFICATIONS:

PIN ASSIGNMENTS:

RESOURCES:

• MMA7361 Datasheet
• Module Schematic
• Arduino MMA7361 Module Tutorial (Instructable)

1. int x; // x axis variable
2. int y; // y axis variable
3. int z; // z axis variable
4. void setup()
5. {
6. Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
7. }
8. void loop()
9. {
10. x = analogRead(5); // read A5 input pin
11. y = analogRead(4); // read A4 input pin
12. z = analogRead(3); // read A3 input pin
13. Serial.print("X = "); // print x adc value
14. Serial.println(x);
15. Serial.print("Y = "); // print y adc value
16. Serial.println(y);
17. Serial.print("Z = "); // print z adc value
18. Serial.println(z);
19. delay(100);
20. }