Screw Shield V2 Terminal & Perfboard Expansion Board for Arduino UNO R3

Screw Shield V2 Terminal & Perfboard Expansion Board for Arduino UNO R3 is a single-piece unified screw-terminal and prototyping shield that plugs directly atop an Arduino UNO R3, Leonardo, or Mega (UNO headers). Furthermore, unlike the split 2-piece V1 wing design, the V2 revision bridges both sides into one rigid PCB featuring 3.5mm perimeter screw terminals, pass-through stackable R3 female headers, a central 2.54mm plated perfboard prototyping grid, an onboard tactile reset button, and a `D13` status LED. Therefore, it provides maximum mechanical rigidity alongside space to solder custom pull-up resistors or driver transistors in the center.

Key Features:

• Rigid One-Piece Full-Bridge Construction: Spans the entire 68.6mm × 53.4mm Arduino UNO footprint for superior mechanical stability when clamping thick 16–24 AWG field wires.
• Central Plated Through-Hole Prototyping Area: Dedicated 2.54mm solder pad matrix in the center of the PCB lets you mount resistors, diodes, optocouplers, or I2C headers.
• Full R3 1.0 Pinout Compatibility: Supports the complete Arduino R3 header layout (`10-pin + 8-pin` digital side and `8-pin + 6-pin` power/analog side, including `IOREF` and top `SDA/SCL`).
• Pass-Through Stackable Female Sockets: Retains top-side female header sockets so another shield or jumper wires can stack directly above the Screw Shield V2.
• Onboard Reset Button & D13 Indicator LED: Relocates the Arduino reset switch and `D13` activity LED to the top surface of the shield.

Technical Specifications:

• Revision: Screw Shield V2.0 (Single-Piece Unified PCB)
• Compatible Host Boards: Arduino UNO R3, Arduino Leonardo R3, ESP32 D1 R32, WeMos D1 R2
• Screw Terminal Count: 32+ Clamping Terminal Positions Covering All Digital (`D0–D13, AREF, GND, SDA, SCL`), Analog (`A0–A5`), and Power (`IOREF, RST, 3.3V, 5V, GND, VIN`) Pins
• Screw Terminal Pitch: 3.5 mm Rising-Clamp Terminal Blocks
• Accepted Wire Size: 16 AWG to 26 AWG Solid or Stranded Conductors
• Prototyping Grid Pitch: Standard 2.54 mm (0.1 inch) Plated Through-Holes

Mechanical Specifications:

• PCB Substrate: Double-Sided Red/Blue FR-4 Fiberglass PCB
• Header Type: Pre-Soldered Long-Pin Stackable 2.54mm Female R3 Headers
• Onboard Controls: Top-Mounted Tactile Reset Button + `D13` Status LED

Dimensions:

• Length: 68.6 mm
• Width: 66.0 mm (Including Outward Screw Terminal Overhang)
• Height: 21.0 mm
• Weight: ≈ 35 g

Pinout and Wiring:

• Digital Side Screw Terminals: Direct 1-to-1 connection to `D0 (RX)` through `D13`, `GND`, `AREF`, `SDA`, and `SCL`.
• Power & Analog Side Screw Terminals: Direct 1-to-1 connection to `IOREF, RESET, 3.3V, 5V, GND, VIN` and `A0–A5`.
• Central Prototyping Area: Uncommitted plated through-holes for custom circuit assembly; connect to adjacent pin pads via short wire bridges on the underside.
• Engineering Precaution: Ensure exposed stripped wire ends inserted into the side screw terminals do not protrude past the inner back wall of the terminal housing where they could touch adjacent through-hole header pins.

Datasheet Reference:

• View Official Arduino UNO R3 R3-Pinout Mechanical & Electrical Datasheet PDF

Commonly Used in:

• Industrial Arduino UNO Control Panels & Wall-Mounted Enclosures
• Permanent Home Automation, Smart Irrigation, and Access Control Systems
• Heavy-Duty Robotics & Automated Test Bench Harnesses

Applications:

• Industrial Sensor Termination: Clamps 1-Wire DS18B20 pull-up networks (with the 4.7kΩ resistor soldered onto the center perfboard) and industrial proximity switches directly to the UNO.
• Stackable Relay & Motor Systems: Sits between an Arduino UNO and a top display shield while routing screw-clamped power and signal lines out the sides.
• Field-Serviceable Prototyping: Allows swapping field sensors with just a flathead screwdriver.

Equivalent Models:

• XD-216 Screw Shield V1 (2-Piece Wing Set): Split 2-wing version without the central perfboard bridge.
• UNO Proto Shield with SYB-170 Mini Breadboard: Provides a central solder/breadboard area without perimeter screw terminals.
• Terminal Expansion Board for UNO R3 / Mega 2560: Extended 84-pin screw shield for full-size Arduino Mega 2560 boards.

Package Includes:

• 1 × Screw Shield V2 Terminal & Perfboard Expansion Board for Arduino UNO R3