This project aims to create a fully open-source Brushless Drive Controller.

Where is the hardware
---------------------
The hardware design files got split into a separate repository on github called
open-bldc-hardware.

Current design
--------------
The current design uses an STM32 microcontroller, Allegro halsensor based
current sensors, IRS2101 bridge drivers. This combination will allow:

- Vectorfield control for smooth and very exact torque and speed control
- N-Mosfet only powerstage design to increase efficiency
- Many different interfaces (PPM, I2C, CAN, USART, USB) for interfacing

Targetted features
------------------
* 3/4C LiPo cell support
* 20A constant power output or more
* Active freewheeling
* Adjustable timings
* Active break with power pushback to the batteries?
* Different interfaces: 
** PPM
** Serial
** I2C
** CAN
* As small as possible; current design is 60x26mm (may and probably will change in the future)
* Software license: GPL, version 3 or later
* Hardware license: CC-BY-SA 3.0
* Rotation speed controller
* Detatchable powerstage
* Vector control support
* Hall sensor support

Inspiration references
----------------------
Some application notes were consulted while designing the circuits of
the drive conntrollers:

http://www.atmel.com/dyn/resources/prod_documents/doc7518.pdf
http://www.atmel.com/dyn/resources/prod_documents/doc7658.pdf

Also some inspiration was taken from the brushless controllers designed by
Holger Buss for the Mikrokopter project (http://www.mikrokopter.de). But the
design is constantly changing and moving away from designs that were considered
as inspirations quickly.

For more information take a look at http://open-bldc.org. A lot of progress
reports are posted on http://www.esden.net, so this page may be worth a look
too.

Licensing
---------
All sourcecode is licensed under GPL version 3 or later, all circuitry designs
and pcb layouts are available as original source files and licensed under
CreativeCommons BY-SA 3.0.

Feel free to use everything here as you wish! :)