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EvvGC 1.3 release version with IMU

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EvvGC 1.3 release version , open source brushless gimbal controller based on STM32 and MPU6050.

EvvGC 1.3 release version with IMU

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 USA customer will have refuned accordingly when good is shipped from USA warehouse

We are still authorized manufactuere & dealer by the author Evaldas. Portion of your purchase will be donated to author to support the development of the project.

The original author has elected to do other things and as such I moved most of the information over to this thread. The original thread referenced below is now closed.

Original information is here -

I'll make every attempt to keep up with all the various changes, etc to this hardware/software platform.

I get this request all the time, so in order to provide for those that would like... I've created a Donation button through paypal. Feel free to use it if you like.

Update as of 20130818
EvvGC is an OPEN SOURCE HARDWARE and SOFTWARE 3 axis solution. It utilizes an STM32 processor, an external IMU, and takes a different approach to motor driving with discrete FET's on both the low and high side. There are a couple of versions of the board in the wild. You will find v1.2 hardware from a small handful of Chinese clone companies. When evaluating those options, please make sure you pick the one that has been modified with the addition of the 3k3 resistors on the low side BSS transistors... This was incorporated in the 1.3 redesign, but the 1.2 board from some vendors have been modified by soldering the resistors across the BSS chips already.

As of 2013/8/18 I know of no commercially available 1.3 boards, they are completely a DIY solution.

Commercially available from here -

Connection diagram:  (PDF DOWNLOAD)
Connection diagnram 

Picture made by Toon.

EvvGC is simple 3/2axisopen source brushless gimbal controller based on STM32 and MPU6050. All components are widely available on eBay, Farnell and other stores. STM32F103RC was chosen because it is cheap, has enough processing power even for complex algorithms, and enough timers and other peripheral for 3axis control. Controller uses mosfets instead of L6234. This allows to use small, light weight mosfets(sot23, sot363) for gopro controllers, and bigger mosfets(so8, D2PAK) for DSLR's, RED's and other big cameras. Source code is written with KEIL, which has demo version with 32kB of code limitation. Now ~20kB is used, so there is some space left for improvements. ST's Standard peripheral drivers uses most of the space, therefore low level coding for i2c, timers, uart should reduce code size if needed. Other software could be used, but KEIL is simple to use, and I would like to keep this project as simple as possible. I am not software developer, so code is quite ugly, it is more like draft for further development, also STM32 is quite new for me, but code works and performs quite well

My goal is to create simple, but flexible, high performance 2/3axis gimbal controller for cameras from gopro to dslr and bigger.
Here is some test videos of 2 and 3 axis stabilization:

STM32 Based 2 axis Brushless Gopro Gimbal (0 min 19 sec)

EvvGC 3-axis Brushless Gimbal Controller first outdoor test (0 min 13 sec)

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