Blackmagic Design 3G-SDI Arduino Shield

Blackmagic Design 3G-SDI Arduino Shield

The Blackmagic Design 3G-SDI Arduino Shield is a unique, open-source expansion board that allows developers and broadcast engineers to build custom camera control solutions. By mounting this shield onto an Arduino (like an Uno), you can embed camera control commands directly into a 3G-SDI "Program Return" feed to control Blackmagic cameras without needing a full ATEM switcher.

It is the ultimate tool for DIY broadcast automation, custom CCU (Camera Control Unit) builds, and specialized PTZ rigs.

Core Functionality

• Command Embedding: The shield takes an incoming SDI signal (like a clean program feed), "injects" control data into the blanking space of the SDI stream, and outputs a modified signal.

• Camera Compatibility: Operates with any Blackmagic camera that supports the SDI Control Protocol, including:

  • Blackmagic Studio Cameras (HD, 4K, 6K models).

  • URSA Mini / URSA Broadcast series.

  • Micro Studio Camera 4K.

• Open Protocol: Uses the Blackmagic Video Device Embedded Control Protocol, allowing you to write your own "sketches" in the Arduino IDE to trigger specific camera actions based on physical inputs (knobs, buttons, or joysticks).

Supported Controls via SDI

Once programmed, the shield can remotely adjust almost every internal parameter of a compatible camera, including:

• Lens Control: Focus, Iris, and Zoom (on electronic lenses).

• Image Shading: Gain, White Balance, Shutter Speed, and Pedestal.

• Color Correction: Full primary DaVinci Resolve color corrector (Lift, Gamma, Gain, Contrast, Hue, and Saturation).

• Production Tools: Tally lights, Detail (sharpening), and triggering internal recording.

Hardware & Integration

• I2C Interface: The shield communicates with the Arduino primarily over the I2C bus. This means it only uses a few pins, leaving the rest of the Arduino's I/O free for you to attach your own buttons, sliders, or OLED displays.

• Powering: The shield includes a 12V DC input (locking connector) which can power both the shield and the attached Arduino board simultaneously.

• SDI Connections: * SDI In: Accepts the return video feed from your switcher or another source.

  • SDI Out: Connects to the camera. The control commands are now "baked" into this signal.

• Multi-Microcontroller Support: Because it uses I2C, you can technically use it with other microcontrollers like a Raspberry Pi or ESP32 with minimal modification.

Technical Specifications

Operational Insight

In 2026, the Arduino Shield is a favorite for automated PTZ control. By pairing the shield with a Blackmagic Micro Studio Camera 4K and a motorized head, you can write a script that converts VISCA commands or joystick movements into SDI data. This allows you to control a robotic head and the camera's lens over a single thin SDI cable.

Pro Tip: If you want to control multiple cameras from one shield, simply run the SDI Output into an SDI Distribution Amplifier. Since each camera can be assigned a "Camera ID" (1–99), the shield can send commands to "Camera 4" specifically, and only that camera will respond, even if all cameras are receiving the same signal.