The Magpie is a 100% Arduino Uno-compatible board with a built-in debugging feature: an LED connected to every digital and analogue I/O pin via a 2N7002 MOSFET. When a pin goes high, its corresponding LED lights up, giving you instant visual feedback on pin states without needing the Serial Monitor or additional test equipment.

Fully compatible with the Arduino Uno R2 standard, the Magpie accepts all standard shields, uses the ATmega16U2 for USB communication, and includes ICSP headers for both the main and USB microcontrollers. The board features clearly labelled pins and rounded corners for a clean finish.

Key Features

• LED on Every I/O Pin – Visual debugging via MOSFET-driven LEDs on all digital and analogue pins
• 100% Arduino Uno R2 Compatible – Works with all standard Uno shields
• ATmega328P-PU – Pre-loaded with the Arduino bootloader
• ATmega16U2 USB Interface – Uses the standard Arduino Uno USB driver
• ICSP Headers – For both main MCU and USB microcontroller
• Clear Pin Labels – Easy identification of all I/O pins
• Open-Source Design – Schematic and design files available on GitHub

Specifications

• Microcontroller – ATmega328P-PU
• USB Interface – ATmega16U2
• Flash Memory – 32 KB
• Digital I/O Pins – 14 (6 with PWM)
• Analogue Inputs – 6
• Input Voltage – 6–12 V DC
• Debug MOSFETs – 2N7002 on every I/O pin (analogue MOSFETs on PCB underside)
• USB Connector – Mini-B (cable not included)

Ideal For

• Debugging Arduino projects visually without extra hardware
• Learning electronics with immediate pin-state feedback
• Rapid prototyping where quick I/O verification is needed

Resources

• Schematic & Open-Source Design Files (GitHub)

Package Contents

• 1× Magpie Arduino Uno-Compatible Board