Open Source Brushless Servo

The odrive is a open source high performance brushless servo platform based on RC BLDC motors. Great Stuff!

Key Specs

  • Two motor channels.
  • 24V, designed for more than 100A peak current.
    • 48V version just released.
  • DC-DC converter, for brake resistor or energy storage.
  • Encoder feedback for arbitrarily precise movements.
  • Supports power regeneration.
  • Optional use of a high power density battery means you can achieve >1kW peak power output with only a modest power supply.
  • Open source: HardwareSoftware

Interfaces

  • USB Serial port — PC, BeagleBone, RaspberryPi, etc.
  • CAN — CANOpen and CiA 402 is a possibility.
  • UART — Arduino, mBed, etc.
  • PWM — RC Recievers, Arduino, etc.
  • Step/direction — Existing motion controllers
  • Some general purpose digital and analogue pins

Protocols

  • Many types of command modes
    • Goto (position control with trajectory planning)
    • Position commands
    • Velocity command
    • Torque command

Lighthouse Sensor Schematics

Basic information on Lighthouse and schematics

Schematics of the discrete part of a sensor node for the Valve/HTC Vive Lighthouse Tracking System courtesy of Alan Yates. More info in this thread on reddit: reddit.com/r/Vive/comments/465lqw/lighthouse_sensor_module_designs/ in Alan Yates posts here: reddit.com/user/vk2zay and in this video with him talking about it at maker faire:

Also interesting the embedded-fm podcast with Alan Yates talking about Lighthouse Development and the science behind it in general: http://embedded.fm/episodes/162

In depth analysis of lighthouse technology

For an in depth analysis of the lighthouse system read Oliver Kreylos post here: doc-ok.org

lighthouse-sensor

Someone made a board from the schematics. The data is on github: github.com/pdaderko/lighthouse_sensor/tree/master/hardware

lighthouse-node-pcb

Open Source implementation

There is a open source implementation of a indoor tracking system that uses the vive base stations on github: https://github.com/ashtuchkin/vive-diy-position-sensor

Official Licensing of Lighthouse Technology

Last but not least. Valve started a royalty-free licensing program to use lighthouse technology for third-party products. Licensees will need to pay $2,975 to attend a training course, but other than that, there’s no licensing fees or royalties for using the tech.

Valve provides a Lighthouse ‘Licensee Dev Kit’ to companies who apply to use the technology. It includes:

Dev Kit Contents

  • A modular reference tracked object suitable for attaching to prototype HMDs or other devices
  • Full complement of EVM circuit boards to enable rapid prototyping of your own tracked object
  • 40 individual sensors for building your own tracked object
  • Accessories to enable custom prototypes

Tools

  • Software toolkit to assist with optimal sensor placement
  • Calibration tools for prototyping and manufacturing

Documentation

  • Schematics and layouts for all electronic components
  • Mechanical designs for the reference tracked object and accessories
  • Datasheets for the sensor ASICs

TinkerSoup – Berlin based electronic kitchen

The Berlin based electronics online shop TinkerSoup is reselling electronic components of lots of tinkerers favorite companies: 4D Systems, Fritzing, Olimex, Pololu, Sharp, Smart Projects, Spark, Fun, ThingM, USGlobalsat, Adafruit

Seems the domain was sold to UK based Pimoroni

A great shop for tinkerers in Berlin is sertronics they sell online but have also a brick and mortar store. They are also an official raspberry reseller.