Macro photo of a green PCB expansion shield showing gold-plated pin headers, crisp laboratory lighting, orthographic top-down angle.
Macro photo of a green PCB expansion shield showing gold-plated pin headers, crisp laboratory lighting, orthographic top-down angle.
Request custom layout
/ HARDWARE STACKING

Precision expansion shields.

Engineered for seamless pin-compatibility with standard ESP32 and Arduino platforms. Our boards feature heavy-duty copper traces and reinforced joints to secure your industrial IoT deployments.

Close-up macro of clean solder joints on a black PCB relay shield, cool directional lighting, high-contrast details.
Close-up macro of clean solder joints on a black PCB relay shield, cool directional lighting, high-contrast details.
VERIFIED SILICON

Built for deployment.

Every expansion plate undergoes rigorous component-level verification in our Shenzhen facility. We eliminate signal degradation across high-density multi-module stacks.

Heavy-duty copper traces

Standard prototyping plates often fail under continuous thermal load. Our shields utilize thick copper layers to maintain low impedance and structural integrity during extended industrial operations.

Custom component swapping

Modify any board to match your specific voltage tolerances. We swap capacitors, inductors, and terminal blocks directly at our Longhua assembly facility with low minimum order requirements.

Top-down macro of an ESP32 sensor shield with terminal blocks, cool laboratory lighting.
Top-down macro of an ESP32 sensor shield with terminal blocks, cool laboratory lighting.
Macro photo of a multi-channel relay expansion board with optocoupler isolation, sharp highlights.
Macro photo of a multi-channel relay expansion board with optocoupler isolation, sharp highlights.
Close-up of a prototype screw terminal breakout board for ESP32, clean metallic traces.
Close-up of a prototype screw terminal breakout board for ESP32, clean metallic traces.
SHIELD TAXONOMY

Verified expansion range.

Sensor Shields

Relay Modules

Prototype Plates

Multi-channel analog and digital sensor interfaces featuring onboard voltage regulation and integrated noise filtering for industrial telemetry.

Din-rail compatible breakout boards with secure screw terminals and generous prototyping areas for custom circuitry.

Optocoupler-isolated relay plates designed to safely switch high-voltage AC/DC loads directly from low-power microcontrollers.

Request Shield Customization
LIGHT CUSTOMIZATION

Modify your shields.

Need custom pin headers, pre-soldered connectors, or specialized component swaps? We handle low-minimum modifications directly from our Shenzhen facility.