Renesas Electronics Tutorial · ptrbrtz/razor-9dof-ahrs Wiki - Nightly Building an AHRS using the SparkFun "9DOF Razor IMU" or "9DOF Sensor Stick" Razor AHRS v1.4.2 — See the Changelog Overview Intro This tutorial describes how to put together an Attitude and Heading Reference System (AHRS) which does not cost much (around 140$/120€) and works very well. It can be used in projects requiring real-time 3D orientation tracking such as RobotsUAVs and autonomous vehiclesImage stabilization systemsHead-tracking, e.g. for binaural audio applications (the SoundScapeRenderer - a spatial audio reproduction tool - has Razor AHRS support built in) Watch a demo video: The tutorial will show you how to build a wired version of the tracker (connected via USB), as well as a wireless version (using Bluetooth). This Razor AHRS Firmware is based on an update of the older AHRS code for a previous version of the Razor board. Improvements over the updated AHRS code currently provided by SparkFun include: Feedback and contributions welcome:
RasClock - Raspberry Pi Real Time Clock Module V3.0 RasClock is a highly accurate real-time clock that plugs directly into the Raspberry Pi and includes a battery backup. The module is installed directly into the GPIO header pins with no wiring or soldering. It uses the 3.3V, GND SDA and SCL pins. The module stays within the outline of the Raspberry Pi and sits lower than video output so can be easilly installed within most cases. Updated V3.0 - The Rasclock now features an 8 Pin Header input, so boards can be stacked on top! RasClock utilises the highly accurate NXP PCF2127AT chip and features: Very accurate timekeeping (typically ±3ppm or <2 minutes deviation per year). Why do I need a Real Time Clock for my Raspberry Pi? The Raspberry Pi is an ultra-small and ultra-low cost computer. The Raspberry Pi will simply revert back to the standard date and time settings (usually 30 November 1999) when the network connection is removed. How do I set it up? Set up is easy, simply follow the guide Outlined in the ModMyPi Raspberry Pi Tutorial Here!
Phidgets Inc. - Unique and Easy to Use USB Interfaces Achims Homepage - PPM Switch - Nightly The I2C servo switch has been applied successfully for several years in various prototypes of the Flobo project. Despite its functional reliability its disadvantage is an extremely limited operating range. The cause is most likely interference of the main computer Gumstix, which is electrically coupled into the I2C bus and thus affects the sensitivity of the R/C receiver. In an appropriate test much greater distances were achieved when the Gumstix was switched off, or at least in idle mode (no read / write on flashdisk). The main requirement for next version of the servo switch therefore was the electrical isolation between the autopilot and R/C circuit and hence a significant increase in range. maximize the reuse of the receiver components, servos remain plugged in the receiver remain functional on autopilot malfunction protection against UAV hijacking from a different remote control Concept The figure shows that the PPM signal must be tapped in the receiver at the right place. Circuit
Analog, Embedded Processing, Semiconductor Company, Texas Instruments - TI.com System-on-chip Complete Solutions - Sigma Designs MEMS IMU - Nightly Based on its 45 years of experience in inertial systems technology NG LITEF designed its new generation MEMS (Micro Electro Mechanical Systems) technology sensors. The µIMU is based on this newest technology. It is a full inertial measurement unit containing 3 MEMS rate sensors, 3 MEMS linear accelerometers, the related electronics and the power supply in one sealed, robust housing. With its small size, easy to integrate interface and excellent performance the µIMU is the perfect measurement unit for all applications like attitude heading reference systems, flight control and guidance systems or for the stabilization of cameras, antennas and other instruments on moving platforms. Datasheet MEMS IMU-IDatasheet MEMS IMU-IC Datasheet MEMS IMU-M For further information, please contact us...
Corporation - Microcontrollers, 32-bit, and touch solutions Bluetooth Low Energy LE wireless 2.4GHz embedded medical data radio modem modules,and LAN Access Point repeaters RF - Nightly