{"product_id":"2125-l3gd20-3-axis-gyro-carrier-with-voltage-regulator","title":"L3GD20 3-Axis Gyro Carrier with Voltage Regulator","description":"\u003cp\u003eThis sensor is a carrier\/breakout board for the ST L3GD20 three-axis gyroscope, which measures the angular rates of rotation about the roll (X), pitch (Y), and yaw (Z) axes. Angular velocity measurements with a configurable range of ±250°\/s, ±500°\/s, or ±2000°\/s can be read through a digital I²C or SPI interface. The board has a 3.3 V linear regulator and integrated level-shifters that allow it to work over an input voltage range of 2.5–5.5 V, and the 0.1″ pin spacing makes it easy to use with standard solderless breadboards and 0.1″ perfboards.\u003cbr\u003e\u003cbr\u003e \u003cem\u003e\u003cfont color=\"red\"\u003e\u003cstrong\u003eClearance:\u003c\/strong\u003e\u003c\/font\u003e This board is being replaced by the newer \u003cstrong\u003e\u003ca href=\"https:\/\/www.pololu.com\/product\/2129\"\u003eL3GD20H carrier\u003c\/a\u003e\u003c\/strong\u003e and \u003ca href=\"https:\/\/www.pololu.com\/product\/2736\"\u003e\u003cstrong\u003eLSM6DS33 carrier\u003c\/strong\u003e\u003c\/a\u003e .\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cbr\u003e \u003cp class=\"note_warning\"\u003e\u003cfont color=\"red\"\u003e\u003cstrong\u003eClearance:\u003c\/strong\u003e\u003c\/font\u003e This board is being replaced by the newer and slightly smaller \u003cstrong\u003e\u003ca href=\"https:\/\/www.pololu.com\/product\/2129\"\u003eL3GD20H carrier\u003c\/a\u003e\u003c\/strong\u003e , which offers several improvements over this product, including better accuracy and stability, lower power consumption, and a much shorter start-up time. While L3GD20H carrier is not a direct drop-in replacement for earlier L3G carriers like the L3GD20 due to differences in pinout and sensor orientation, the L3GD20H and the L3GD20 share the same register structure and I²C device address, so code written for one should be easily portable to the other. This product will be discontinued when stock runs out and is not recommended for new designs where continued part availability is important.\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003e4 Feb 2016 update:\u003c\/strong\u003e We now have an even newer \u003ca href=\"https:\/\/www.pololu.com\/product\/2736\"\u003e\u003cstrong\u003eLSM6DS33 carrier\u003c\/strong\u003e\u003c\/a\u003e , which combines a 3-axis gyro with a 3-axis accelerometer on a board that is the same size as and features the same pinout as the L3GD20H carrier.\u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption right\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J3505.1200.jpg?7e5a9376447fe71a08b9028b1b7ef541\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id gyro carrier with voltage regulator bottom view dimensions. data-picture-id=\"0J3505\" data-picture-longest_side=\"800\" src=\"https:\/\/a.pololu-files.com\/picture\/0J3505.250.jpg?7e5a9376447fe71a08b9028b1b7ef541\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003ch2\u003e Overview\u003c\/h2\u003e\n\n \u003cp\u003eThis board is a compact (0.5″ × 0.9″) breakout board for ST's L3GD20 three-axis digital-output gyroscope; we therefore recommend careful reading of the \u003ca href=\"\/en\/file\/0J563\/L3GD20.pdf\"\u003eL3GD20 datasheet\u003c\/a\u003e (2MB pdf) before using this product. The L3GD20 is a great IC, but its small, leadless, LGA package makes it difficult for the typical student or hobbyist to use. It also operates at voltages below 3.6 V, which can make interfacing difficult for microcontrollers operating at 5 V. This carrier board addresses these issues by incorporating additional electronics, including a 3.3 V voltage regulator and level-shifting circuits, while keeping the overall size as compact as possible. The board ships fully populated with its SMD components, including the L3GD20, as shown in the product picture.\u003c\/p\u003e\n\n \u003cp\u003eCompared to the older \u003ca href=\"https:\/\/www.pololu.com\/product\/1272\"\u003eL3G4200D\u003c\/a\u003e , the L3GD20 uses a higher resonant frequency that makes it more resistant to audio noise and vibrations. This board remains pin-compatible with the original L3G4200D carrier, although changes in I²C addresses and configuration registers mean that code written to interface with an L3G4200D might need to be modified to work with an L3GD20.\u003c\/p\u003e\n\n\u003cp\u003e The L3GD20 has many configurable options, including three selectable angular rate sensitivities, a choice of output data rates, an embedded FIFO for buffering output data, and a programmable external interrupt signal. The three angular velocity readings are available through a digital interface, which can be configured to operate in either I²C or SPI mode.\u003c\/p\u003e\n\n \u003cp\u003eThe carrier board includes a low-dropout linear voltage regulator that provides the 3.3 V required by the L3GD20, which allows the sensor to be powered from a 2.5-5.5 V supply. The regulator output is available on the VDD pin and can supply almost 150 mA to external devices. The breakout board also includes a circuit that shifts the I²C\/SPI clock and data in lines to the same logic voltage level as the supplied VIN, making it simple to interface the board with 5 V systems, and the board's 0.1″ pin spacing makes it easy to use with standard \u003ca href=\"https:\/\/www.pololu.com\/category\/28\/solderless-breadboards\"\u003esolderless breadboards\u003c\/a\u003e and 0.1″ perfboards.\u003c\/p\u003e\n\n \u003cp\u003eFor sensor fusion applications, our \u003ca href=\"https:\/\/www.pololu.com\/product\/2468\"\u003eMinIMU-9 v3\u003c\/a\u003e and \u003ca href=\"https:\/\/www.pololu.com\/product\/2470\"\u003eAltIMU-10 v4\u003c\/a\u003e inertial measurement units combine the similar \u003ca href=\"https:\/\/www.pololu.com\/product\/2129\"\u003eL3GD20H\u003c\/a\u003e with an \u003ca href=\"https:\/\/www.pololu.com\/product\/2127\"\u003eLSM303D\u003c\/a\u003e 3-axis accelerometer and 3-axis magnetometer on a single board, providing nine independent readings that can be used to calculate an absolute orientation. The AltIMU-10 v4 also includes an \u003ca href=\"https:\/\/www.pololu.com\/product\/2867\"\u003eLPS25H\u003c\/a\u003e pressure sensor that can be used to calculate altitude.\u003c\/p\u003e\n\n\u003ch3 class=\"clear\"\u003e Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Dimensions: 0.5″ × 0.9″ × 0.1″ (13 × 23 × 3 mm)\u003c\/li\u003e\n\n\u003cli\u003e Weight without header pins: 0.7 g (0.03 oz)\u003c\/li\u003e\n\n\u003cli\u003e Operating voltage: 2.5 to 5.5 V\u003c\/li\u003e\n\n\u003cli\u003e Supply current: 7 mA\u003c\/li\u003e\n\n\u003cli\u003e Output format (I²C\/SPI): one 16-bit reading per axis\u003c\/li\u003e\n\n\u003cli\u003e Sensitivity range (configurable): ±250°\/s, ±500°\/s, or ±2000°\/s\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003e Included components\u003c\/h3\u003e\n\n \u003cp\u003eA 9×1 strip of \u003ca href=\"https:\/\/www.pololu.com\/product\/965\"\u003e0.1″ header pins\u003c\/a\u003e and a 9×1 strip of \u003ca href=\"https:\/\/www.pololu.com\/product\/967\"\u003e0.1″ right-angle header pins\u003c\/a\u003e are included, as shown in the picture below. You can solder the header strip of your choice to the board for use with \u003ca href=\"https:\/\/www.pololu.com\/category\/70\/crimp-connector-housings\"\u003ecustom cables\u003c\/a\u003e or \u003ca href=\"https:\/\/www.pololu.com\/category\/28\/solderless-breadboards\"\u003esolderless breadboards\u003c\/a\u003e , or you can solder wires directly to the board itself for more compact installations.\u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4062.1200.jpg?5c812196ffda2e56da7d41dda243238f\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id gyro carrier with voltage regulator included hardware. data-picture-id=\"0J4062\" data-picture-longest_side=\"800\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4062.300.jpg?5c812196ffda2e56da7d41dda243238f\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003ch2 class=\"clear\"\u003e Using the L3GD20\u003c\/h2\u003e\n\n\u003ch3\u003e Connections\u003c\/h3\u003e\n\n \u003cp\u003eRegardless of the interface being used to communicate with the L3GD20, its VIN pin should be connected to a 2.5-5.5 V source, and GND should be connected to 0 volts. (Alternatively, if you are using the gyro with a 3.3 V system, you can leave VIN disconnected and bypass the built-in regulator by connecting 3.3 V directly to VDD.)\u003c\/p\u003e\n\n\u003cp\u003e A minimum of two logic connections are necessary to use the L3GD20 in I²C mode (this is the default mode): SCL and SDA. These pins are connected to built-in level-shifters that make them safe to use at voltages over 3.3 V; they should be connected to an I²C bus operating at the same logic level as VIN. The remaining pins are\u003cins\u003e note\u003c\/ins\u003e connected to level-shifters on the board and are not 5V-tolerant, but our \u003ca href=\"https:\/\/www.pololu.com\/product\/2595\"\u003e4-channel bidirectional logic level shifter\u003c\/a\u003e can be used externally with those pins to achieve the same effect.\u003c\/p\u003e\n\n \u003cp\u003eTo use the L3GD20 in the default SPI mode, four logic connections are required: SPC, SDI, SDO, and CS. These should be connected to an SPI bus operating at the same logic level as VIN. The SPI interface operates in 4-wire mode by default, with SDI and SDO on separate pins, but it can be configured to use 3-wire mode so that SDO shares a pin with SDI. \u003c\/p\u003e\n\n\u003ctable class=\"side_by_side_pics\"\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e\u003ctd style=\"max-width: 325px\"\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4063.1200.png?2ff2bb56cb336bebbd87eec45356061a\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id gyro carrier with voltage regulator labeled top view. data-picture-id=\"0J4063\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4063.325.jpg?2ff2bb56cb336bebbd87eec45356061a\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 325px\"\u003e\u003cp\u003e L3GD20 3-axis gyro carrier with voltage regulator, labeled top view. \u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e\u003ctd style=\"max-width: 275px\"\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J3508.1200.jpg?1a887c2e0074e90fbbcc1a01721a7501\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id gyro carrier with voltage regulator in a breadboard. data-picture-id=\"0J3508\" data-picture-longest_side=\"800\" src=\"https:\/\/a.pololu-files.com\/picture\/0J3508.275.jpg?1a887c2e0074e90fbbcc1a01721a7501\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 275px\"\u003e\u003cp\u003e L3G4200D\/L3GD20 3-axis gyro carrier with voltage regulator in a breadboard.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch3 class=\"clear\"\u003e Pinout\u003c\/h3\u003e\n\n\u003ctable class=\"specifications center\"\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e PIN\u003c\/th\u003e\n\n\u003cth\u003e Description\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"odd\"\u003e\n\n\u003ctd\u003e VIN\u003c\/td\u003e\n\n\u003ctd style=\"text-align:left;\"\u003e This is the main 2.5-5.5 V power supply connection. The SCL\/SPC and SDA\/SDI level shifters pull the I²C and SPI bus high bits up to this level.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e GND\u003c\/td\u003e\n\n\t\t \u003ctd style=\"text-align:left;\"\u003eThe ground (0 V) connection for your power supply. Your I²C or SPI control source must also share a common ground with this board.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"odd\"\u003e\n\n\u003ctd\u003e VDD\u003c\/td\u003e\n\n\u003ctd style=\"text-align:left;\"\u003e Regulated 3.3 V \u003cstrong\u003eoutput\u003c\/strong\u003e . Almost 150 mA is available to power external components. (If you want to bypass the internal regulator, you can instead use this pin as a 3.3 V input with VIN disconnected.)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e SCL\/SPC\u003c\/td\u003e\n\n\u003ctd style=\"text-align:left;\"\u003e Level-shifted I²C\/SPI clock line: HIGH is VIN, LOW is 0 V\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"odd\"\u003e\n\n\u003ctd\u003e SDA\/SDI\u003c\/td\u003e\n\n\u003ctd style=\"text-align:left;\"\u003e Level-shifted I²C data line and SPI data in line (also doubles as SDO in 3-wire mode): HIGH is VIN, LOW is 0 V\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e SDO\u003c\/td\u003e\n\n\u003ctd style=\"text-align:left;\"\u003e SPI data out line in 4-wire mode: HIGH is VDD, LOW is 0 V. \u003cem\u003eThis output is not level-shifted.\u003c\/em\u003e Also used as an input to determine I²C slave address (see below).\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"odd\"\u003e\n\n\u003ctd\u003e CS\u003c\/td\u003e\n\n\u003ctd style=\"text-align:left;\"\u003e SPI enable (chip select). Pulled up to VDD to enable I²C communication by default; drive low to begin SPI communication.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e DRDY\/INT2\u003c\/td\u003e\n\n\t\t \u003ctd style=\"text-align:left;\"\u003eData ready indicator, at 3.3-V-logic-level output. HIGH (3.3 V) indicates angular rate data can be read. Can also be configured as a FIFO interrupt. \u003cem\u003eThis output is not level-shifted.\u003c\/em\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"odd\"\u003e\n\n\u003ctd\u003e INT1\u003c\/td\u003e\n\n\u003ctd style=\"text-align:left;\"\u003e Programmable interrupt, 3.3-V-logic-level output. \u003cem\u003eThis output is not level-shifted.\u003c\/em\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch3\u003e Schematic Diagram \u003c\/h3\u003e\n\n\u003ctable class=\"picture_with_caption center wide\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e\u003cimg alt=\"\" class=\"wide\" data-gallery-pictures=\"[{\" id of the l3gd20 gyro carrier with voltage regulator. data-picture-id=\"0J4064\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4064.600.png?2f05d273e8e3419f3ba7dd9a8de20372\"\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003cp\u003e The above schematic shows the additional components the carrier board incorporates to make the L3GD20 easier to use, including the voltage regulator that allows the board to be powered from a 2.5-5.5 V supply and the level-shifter circuit that allows for I²C and SPI communication at the same logic voltage level as VIN.\u003c\/p\u003e\n\n\u003ch3\u003e I²C Communication\u003c\/h3\u003e\n\n \u003cp\u003eWith the CS pin in its default state (pulled up to VDD), the L3GD20 can be configured and its angular velocity readings can be queried through the I²C bus. Level shifters on the I²C clock (SCL) and data (SDA) lines enable I²C communication with microcontrollers operating at the same voltage as VIN (2.5-5.5 V). A detailed explanation of the I²C interface on the L3GD20 can be found in its \u003ca href=\"\/en\/file\/0J563\/L3GD20.pdf\"\u003edatasheet\u003c\/a\u003e (2MB pdf), and more detailed information about I²C in general can be found in \u003ca href=\"\/en\/file\/0J435\/UM10204.pdf\"\u003eNXP's I²C-bus specification\u003c\/a\u003e (1MB pdf).\u003c\/p\u003e\n\n\u003cp\u003e In I²C mode, the gyro's 7-bit slave address has its least significant bit (LSb) determined by the voltage on the SDO pin. The carrier board pulls SDO to VDD through a 10 kΩ resistor, making the LSb 1 and setting the slave address to 1101011b by default. If the gyro's selected slave address happens to conflict with some other device on your I²C bus, you can drive SDO low to set the LSb to 0.\u003c\/p\u003e\n\n \u003cp\u003eIn our tests of the board, we were able to communicate with the chip at clock frequencies up to 400 kHz; higher frequencies might work but were not tested.\u003c\/p\u003e\n\n\u003ch3\u003e SPI Communications\u003c\/h3\u003e\n\n\u003cp\u003e To communicate with the L3GD20 in SPI mode, the CS pin (which the board pulls to VDD through a 10 kΩ resistor) must be driven low before the start of an SPI command and allowed to return high after the end of the command. Level shifters on the SPI clock (SPC) and data in (SDI) lines enable SPI communication with microcontrollers operating at the same voltage as VIN (2.5-5.5 V).\u003c\/p\u003e\n\n\u003cp\u003e In the default 4-wire mode, the gyro transmits data to the SPI master on a dedicated data out (SDO) line. If the SPI interface is configured to use 3-wire mode instead, the SDI line doubles as SDO and is driven by the L3GD20 when it transmits data to the master. A detailed explanation of the SPI interface on the L3GD20 can be found in its \u003ca href=\"\/en\/file\/0J563\/L3GD20.pdf\"\u003edatasheet\u003c\/a\u003e (2MB pdf).\u003c\/p\u003e\n\n\u003ch4\u003e Sample Code\u003c\/h4\u003e\n\n \u003cp\u003eWe have written a basic \u003ca href=\"https:\/\/github.com\/pololu\/l3g-arduino\"\u003eArduino library for the L3GD20\u003c\/a\u003e that makes it easy to interface this sensor with an \u003ca href=\"https:\/\/www.pololu.com\/product\/2191\"\u003eArduino\u003c\/a\u003e or Arduino-compatible board like an \u003ca href=\"https:\/\/www.pololu.com\/category\/149\/a-star-programmable-controllers\"\u003eA-Star\u003c\/a\u003e . The library makes it simple to configure the L3GD20 and read the raw gyro data through I²C.\u003c\/p\u003e\n\n\u003ch3\u003e Protocol Hints\u003c\/h3\u003e\n\n\u003cp\u003e The datasheet provides all the information you need to use this sensor, but picking out the important details can take some time. Here are some pointers for communicating with and configuring the L3GD20 that we hope will get you up and running a little bit faster:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e The gyro is in power down mode by default. You have to turn it on by writing the appropriate value to the CTRL_REG1 register.\u003c\/li\u003e\n\n\u003cli\u003e You can read or write multiple registers in a single I²C command by asserting the most significant bit of the register address to enable address auto-increment.\u003c\/li\u003e\n\n\t \u003cli\u003eYou can enable the same auto-increment feature in SPI mode by asserting the second bit (bit 1, called the M \u003cspan style=\"text-decoration:overline\"\u003eS\u003c\/span\u003e bit in the datasheet) of an SPI command.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Pololu","offers":[{"title":"2-4 Weeks","offer_id":47696600465753,"sku":"POL-2125","price":29.21,"currency_code":"EUR","in_stock":true},{"title":"1 day","offer_id":47885965590873,"sku":"POL-2125\/A","price":29.21,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/1009\/7753\/files\/0J4061.1200.jpg?v=1705454289","url":"https:\/\/robot-italy.com\/en\/products\/2125-l3gd20-3-axis-gyro-carrier-with-voltage-regulator","provider":"Robot Italy","version":"1.0","type":"link"}