The 16Hz.com Ultimate Uno Kit has an "ADXL3XX" MPU6050 board in it and I tried to get it going with only partial success.
I believe I connected the MPU6050 accelerometer/gyroscope board correctly as indicated in the "Sensors" section. Then I executed the test program "ADXL3XX.INO" and enabled the Serial Monitor to look at the incoming data. The red LED on the accelerometer board is on indicating the board is getting power and the "TX" LED on the Uno board is flashing. Rows of three triple-digit numbers are appearing on the Monitor. However. they do NOT change as I change the position of the accelerometer board. All three numbers stay fixed at 686, which I believe is "full-lock" -90deg.
Here are the hook-up details.
accelerometer board Pin -------UNO board "Analog IN" connector pin
Vcc A5
GND A4
SCL A3
SDA A2
XDA A1
XCL A0
ADO NO CONNECTION
INT NO CONNECTION
It appears the Accelerometer is powered and returning data, but the data
is unchanging, as if the accelerometer may be defective. I'd like to know if I
connected it correctly.
BTW, I used the canned code in the Arduino download from 16Hz.com:
/*
ADXL3xx
Reads an Analog Devices ADXL3xx accelerometer and communicates the
acceleration to the computer. The pins used are designed to be easily
compatible with the breakout boards from Sparkfun, available from:
The circuit:
analog 0: accelerometer self test
analog 1: z-axis
analog 2: y-axis
analog 3: x-axis
analog 4: ground
analog 5: vcc
created 2 Jul 2008
by David A. Mellis
modified 30 Aug 2011
by Tom Igoe
This example code is in the public domain.
*/
// these constants describe the pins. They won't change:
const int groundpin = 18; // analog input pin 4 -- ground
const int powerpin = 19; // analog input pin 5 -- voltage
const int xpin = A3; // x-axis of the accelerometer
const int ypin = A2; // y-axis
const int zpin = A1; // z-axis (only on 3-axis models)
void setup() {
// initialize the serial communications:
Serial.begin(9600);
// Provide ground and power by using the analog inputs as normal
// digital pins. This makes it possible to directly connect the
// breakout board to the Arduino. If you use the normal 5V and
// GND pins on the Arduino, you can remove these lines.
pinMode(groundpin, OUTPUT);
pinMode(powerpin, OUTPUT);
digitalWrite(groundpin, LOW);
digitalWrite(powerpin, HIGH);
}
void loop() {
// print the sensor values:
Serial.print(analogRead(xpin));
// print a tab between values:
Serial.print("\t");
Serial.print(analogRead(ypin));
// print a tab between values:
Serial.print("\t");
Serial.print(analogRead(zpin));
Serial.println();
// delay before next reading:
delay(100);
}
I'm sure Vcc and GND are okay, but not so sure about X,Y,Z, and the "self test" connections.