BaseCam SimpleBGC 32-bit Tiny Rev. A, B
This controller is a smaller version of SimpleBGC 32-bit 3-axis stabilization. It is designed for building gimbals for small cameras.
/!\ Revision A is discontinued. Revision B is produced but not recommended for new design. Replacement is Tiny Rev.C
Built-inIMU sensor, can be used as a second frame sensor or as a main sensor.
- Possibility to regulate voltage from 6 up to 11 V and connect small motors despite current of a battery.
- Has the same sockets as the full size SimpleBGC 32-bit.
- Possibility to connect optional Bluetooth module.
Comparing revisions A and B
SimpleBGC 32bit Tiny controller revision B has the following improvements compared to revision A:
- Smaller than the previous version: dimensions are 25×40 mm, height is 7mm (pin headers are not installed)
- Current capabilities were extended:
- +5V line can provide up to 1A continuous current (that is enough to power GoPro camera), and up to 2A instant current *
- +3.3V line can provide up to 500 mA continuous current and 1A instant current *
- Input voltage range was extended to 1s 6s (3.7V–25V)
- USB-UART onboard converter simplifies PC connection, fewer problems with drivers compared to the previous version
* Total current taken by the 5V load, 3.3V load, and motor drivers, should not exceed 2A. Proper thermal dissipation is required.
Capabilities of the controller
Possibility to manage the system on different platforms
Desktop systems: Windows, macOS, Linux. Possibility to update the firmware of the controller(through the GUI).
Smartphones: Android and some control from 3rd party vendors for Apple's iOS product (iPhone and iPad).
Open Serial API
Open programming interface for development of external control modules — both for software configuration and control of the board and for communication with various electronic devices.
Automatic tuning of PID parameters
Automatic tuning of PID parameters will allow you to quickly prepare the system for work either at the initial settings or at changed conditions.
Support of systems with various configurations
Flexible customization of the sensor orientation.
Support for a wide range of motors of various configurations and sizes.
Support for two sensors
The system works with either one or two IMU sensors. The use of two sensors improves stability and accuracy.
Optimized control algorithm
The algorithm uses no more than 30% of CPU power and has a large reserve for future opportunities.
Operation of the system at any angle
The system operates at any inclination of the stabilizer frame, and has several modes of operation: Briefcase (90 degrees rotation ROLL) and Upside Down as well.
Different algorithms of follow mode
Flexible configuration of the follow mode for each axis. Automatic switching of horizon axis mode from lock to follow in case of persistent camera tilt.
Up to five user-configurable modes of system operation with a toggle button
Support of a wide range of external control protocols
Futaba, Spektrum, 5x PWM, Sum-PPM, 3 ADC.
Flexible configuration allows for control of any functions of the system (every parameter that the system uses is configurable).
The system can decode Futaba / Spectrum and provide PWM to control servo drives.
Battery voltage drop compensation
Battery voltage drop compensation ensures proper control of the drive motors during the whole life of the battery.
Different versions of the controllers for different needs
The licensing system allowed our partners to launch different versions of controllers for a wide range of applications: from compact controllers for stabilizers of light cameras to powerful ones for the stabilization of heavy units.
Ongoing work to improve the system
BaseCam Electronics is working closely with the developers of end devices, which allows us on the basis of feedback, to continuously improve the stabilization algorithms and expand the capabilities of the system within a single version of the controller.
In fact, gimbal based on BLDC motors is very similar to regular gimbal based on hobby servo. The main difference - each axis of rotation passes through the center of gravity (CG) of the "Camera + frame" system and rigidly connected to the BLDC motor. The absence of gear - a fundamental point that lets you use the inertia of the system is not to harm, but for good. In case of ideal balance of the camera, the rotor rotates freely without resistance and even without need of applying extra control force, which allows the camera to unleash from the disturbance from UAV frame. In addition, there is no backlash inherent gears or belts.
To control the motors, a special controller was designed. It receives information from gyroscopes and accelerometers mounted on the camera platform. A standard IMU algorithm is used to define camera inclination angles. With the remote control, operator sets desired tilt angle. PID-controller calculates the amount of compensation and send command to the power unit, which controls the current in the windings and thus the direction of the vector of magnetic field in the stator. Magnetic field moves the rotor to the right position.
Due to using IMU, mechanical part of the system is a very simple. There is no need in complex and expensive high-definition encoders for each axis. Just mount tiny IMU board on the camera platform, connect wires to controller and motors and all done!
It gives impressive quality of stabilization compared with regular servos.
Basic requirements for the mechanical design of gimbal frame
- The possibility of precise balancing on three axes. The better the balance, the lower the current need for stabilization.
- Mechanical rigidity of bearing elements to prevent resonances from working propellers in flight.
- Minimizing friction in the joints. The better the gimbal axis are unleashed from UAV camera platform, the less effort is required from the engine to stabilize
- Elimination of vibrations from the main UAV frame. The vibrations have a negative impact on the quality of the video. But another negative effect in this system is that vibration will lead to self-excitation of the closed-loop controller.
/!\ Important notes
A. Some versions of this board may have minor error in labeling outputs: On boards having the
B. Some versions of the full size 32-bit controller board can have a problem with the spektrum port (see that boards description for more information): At present we are not seeing the problem with this board, though for aerial vehicles where operation is critical it may be advisable nonetheless to make similar changes to account for the possibility- in particular the advisory for the other board is to power the spectrum satellite receiver separately (not from the board power).
|Size of the board:
|Power supply voltage:
|3.7–25 V (1s 6s LiPo)
|7.4–16.8 V (2s 4s LiPo)
|Maximum motor current:
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USB Drivers for PC Connection
If controller being connected to the USB port, is not recognized as COM-port, most probably you need to install or update drivers for CP210x chip. You can download driver for your OS from the manufacturer of CP210x.
AN IMPORTANT NOTE: The latest version (6.7.4) of driver for Windows may cause problems with delay in data transmission, visible as a big lag of the GUI. In this case, install version 6.7.2 of the driver, which had no such problems.
- AUX1 and AUX3 labels may be mixed up on some boards.