This is the VirtualWire library. END OF LIFE NOTICE. This VirtualWire library has now been superceded by the RadioHead library httpwww. Quick solution for use some ATmega microcontrollers in newer Arduino IDE ver. As we know, recent changes in the Arduino world have boosted development of. Here at SparkFun, we refuse to leave good enough alone. Thats why were adding to our lineup of Arduinocompatible microcontrollers once more The Pro. Youre welcome. These rotary encoders should be used for non critical applications. At less than 2 a piece they are worth it. I think that most people are over. Get started with Arduino and the MPU 6. Sensor By Arvind Sanjeev, Founder of DIY Hacking. Arduino MPU 6. 05. Setup. In this post, I will be reviewing a few basic IMU Inertia Measurement Unit sensors that are compatible Arduino. Arduino Ide 1.5 2' title='Arduino Ide 1.5 2' />I will also give a short tutorial for interfacing an Arduino with the best IMU sensor available. IMU sensors like the MPU 6. UAVs, smartphones, and more. IMU sensors are one of the most common types of sensors used today in all kinds of electronic gadgets. IMU sensors help us in getting the attitude of an object, attached to the sensor in three dimensional space. These values are usually in angles to help us to determine its attitude. They are used in smartphones to detect their orientation or in wearable gadgets like the Fit Bit, which use IMU sensors to track movement. IMU sensors have a prolific number of applications. It is even considered to be an inexorable component in quadcopters. Some of the sensors I was able to get my hands on were ADXL 3. ITG 3. 20. 0 gyroscope. Sparkfun 6 DOF IMU sensor board. MPU 6. 05. 0. I was able to work with both accelerometers and gyroscopes separately. However, they are not as accurate alone as when they are combined. Among the lot, I found the Invensense MPU 6. IMU sensor. Apart from being significantly cheaper than the other sensors, the MPU 6. Arduino MPU 6. 05. Pictures/Preferences_JSON.png' alt='Arduino Ide 1.5 2' title='Arduino Ide 1.5 2' />Pin out. In this tutorial, I will give you a basic introduction to the MPU 6. Arduino, and show you how to make a 3. D model using the data from your Arduino MPU 6. Required Materials. Hardware Arduino or an Arduino clone board Freeduino. Or make your own custom Arduino board with this tutorial. MPU 6. 05. 0 sensor. Interconnecting wires. Software Arduino IDE Arduino. Processing IDE Processing optionalHow Does it WorkIMU sensors usually consist of two or more parts. Listing them by priority, they are the accelerometer, gyroscope, magnetometer, and altimeter. The MPU 6. 05. 0 is a 6 DOF Degrees of Freedom or a six axis IMU sensor, which means that it gives six values as output. Three values from the accelerometer and three from the gyroscope. The MPU 6. 05. 0 is a sensor based on MEMS Micro Electro Mechanical Systems technology. Both the accelerometer and the gyroscope are embedded inside a single chip. This chip uses I2. C Inter Integrated Circuit protocol for communication. How Does an Accelerometer Work Piezo Electric Accelerometer. An accelerometer works on the principle of the piezoelectric effect. Here, imagine a cuboidal box with a small ball inside it, like in the picture above. The walls of this box are made with piezoelectric crystals. Whenever you tilt the box, the ball is forced to move in the direction of the inclination, due to gravity. S4A Scratch for Arduino is a Scratch modification that brings the easiness of programming with Scratch to the Arduino prototyping board. The wall that the ball collides with creates tiny piezoelectric currents. There are three pairs of opposite walls in a cuboid. Each pair corresponds to an axis in 3. D space X, Y, and Z axes. Depending on the current produced from the piezoelectric walls, we can determine the direction of inclination and its magnitude. How Does a Gyroscope Work Piezo Electric Gyroscope. Gyroscopes work on the principle of Coriolis acceleration. Imagine that there is a fork like structure that is in a constant back and forth motion. It is held in place using piezoelectric crystals. Whenever you try to tilt this arrangement, the crystals experience a force in the direction of inclination. This is caused as a result of the inertia of the moving fork. The crystals thus produce a current in consensus with the piezoelectric effect, and this current is amplified. The values are then refined by the host microcontroller. Check this short video that explains how a MEMS gyroscope works. Interfacing the Arduino MPU 6. The MPU 6. 05. 0 communicates with the Arduino through the I2. C protocol. The MPU 6. Arduino as shown in the following diagram. If your MPU 6. 05. V pin, then you can connect it to your Arduinos 5. V pin. If not, you will have to connect it to the 3. V pin. Next, the GND of the Arduino is connected to the GND of the MPU 6. Arduino MPU 6. 05. The program we will be running here, also takes advantage of the Arduinos interrupt pin. Connect your Arduinos digital pin 2 interrupt pin 0 to the pin labeled as INT on the MPU 6. Next, we need to set up the I2. C lines. To do this, connect the pin labeled SDA on the MPU 6. Arduinos analog pin 4 SDA and the pin labeled as SCL on the MPU 6. Arduinos analog pin 5 SCL. Thats it, you have finished wiring up the Arduino MPU 6. Uploading the Code and Testing the Arduino MPU 6. To test the Arduino MPU 6. Arduino library for MPU 6. Jeff Rowberg. You can find the library here. Next, you have to unzipextract this library and take the folder named MPU6. Arduinos library folder. To do this, go to the location where you have installed Arduino Arduino libraries and paste it inside the libraries folder. You might also have to do the same thing to install the I2. How To Install A Boost Solenoid Actuator. Cdev library if you dont already have it for your Arduino. Do the same procedure as above to install it, you can find the file here I2. Cdev library. If you have done this correctly, when you open the Arduino IDE, you can see MPU6. File Examples. Next, open the example program from File Examples MPU6. Examples MPU6. DMP6. Arduino MPU 6. DMP code. Next, you have to upload this code to your Arduino. After uploading the code, open up the serial monitor and set the baud rate as 1. Next, check if you see stuff like Initializing I2. C devices on the serial monitor. If you dont, just press the reset button. Now, youll see a line saying  Send any character to begin DMP programming and demo. Just type in any character on the serial monitor and send it and you should start seeing the yaw, pitch, and roll values coming in from the MPU 6. Like so Arduino MPU 6. Serial Monitor. DMP stands for Digital Motion Processing. The MPU 6. 05. 0 has a built in motion processor. It processes the values from the accelerometer and gyroscope to give us accurate 3. D values. Also, you will need to wait about 1. Arduino MPU 6. 05. After which, the values will begin to stabilize. Just check out the video below to see if yours is working correctly. Modeling the Values from the Arduino MPU 6. D Using Processing OptionalIf you want to see the 3. D model of the sensor, continue reading. To view the 3. D representation of the data from the MPU 6. IDE. Processing is similar to Arduino, except for a couple of functions. Processing is mainly used for visualizing data and rendering it in 2. D3. D models. Arduino MPU 6. Processing. After installing the processing IDE, next, you will need to download a library called Toxi. This library is necessary for our Arduino MPU 6. Next, you need to extract this file and paste the folder named toxiclibs complete 0. You can find the libraries folder inside the Sketchbook folder for processing. If you dont, then you will have to create a new folder called libraries there and paste the toxiclibs inside it. To visualize the 3. D model in processing, first, you have to upload the Arduino code for MPU 6. MPU6. 05. 0DMP6. Before doing that, you need to comment the line in the Arduino MPU6. DMP6 code which says define OUTPUTREADABLEYAWPITCHROLL  by  define OUTPUTREADABLEYAWPITCHROLL. And uncomment the line which says define OUTPUTTEAPOT  by  define OUTPUTTEAPOT. Next, you have to open the processing example for the MPU 6. Open processing, then File Open then navigate to the folder where you installed the MPU6.