Multi-Function Prototyping Expansion Shield for Arduino UNO Leonardo MEGA2560

$8.29

Unlock your creativity with the Multi-Function Prototyping Expansion Shield for Arduino UNO, Leonardo, and MEGA2560! This plug-and-play development board features a 4-digit 7-segment LED display, tactile buttons, and a piezo buzzer to enhance your projects. Effortlessly access I/O devices for optimal prototyping, making it perfect for beginners and seasoned makers alike. Easily connect temperature sensors, servos, and more through dedicated expansion headers. Designed for seamless integration, this shield ensures quick setup with your Arduino board via standard R3 headers. Enjoy fast, free US shipping and responsive customer support. Elevate your Arduino experience today!

Electronics for IoT, Prototyping & DIY

The Multi-Function Prototyping / Expansion Shield is an Arduino-compatible development board packed with on-board components and expansion headers. It plugs directly onto your Arduino-compatible UNO R3, Leonardo, or MEGA2560 using standard R3-type headers -- no wiring or breadboard needed to get started. Ideal for beginners learning Arduino and experienced makers who need quick access to common I/O devices for prototyping.

🔧 How It Works

Align the shield\'s pin headers with your Arduino-compatible UNO R3, Leonardo, or MEGA2560 and press firmly until all pins are fully seated.
Connect your Arduino to your computer via USB cable and open the Arduino IDE.
Upload a sketch -- the shield\'s on-board components (LEDs, display, buttons, buzzer, potentiometer) are ready to use immediately.
Use the expansion headers to connect optional external modules such as temperature sensors (DS18B20, LM35), an infrared receiver, servo motors, or serial communication devices.

⚡ Key Features

Plug-and-Play Compatibility -- Seamlessly connects with Arduino UNO R3, Leonardo, and MEGA2560 controllers via standard R3 headers
4-Digit 7-Segment LED Display -- Driven by two cascaded 74HC595 serial-to-parallel shift registers for efficient pin usage
4× Surface Mount LEDs -- Active LOW indicator LEDs on pins D10–D13, convenient for debugging and status indication
10K Precision Potentiometer -- #3296 multi-turn analog adjustable trimpot on pin A0 for voltage adjustment, brightness control, and more
3× Independent Push Buttons -- Active LOW buttons on pins A1, A2, and A3 for user input and interaction
Integrated Piezo Buzzer -- Transistor-driven buzzer on pin D3 for audible alerts and tone generation
DS18B20 Temperature Sensor Interface -- One-wire digital temperature sensor header on pin A4 (sensor not included)
LM35 Temperature Sensor Interface -- Analog temperature sensor header on shared pin A4 (sensor not included)
Infrared Receiver Interface -- Header on pin D2 for IR receiver modules such as the 1838B (receiver not included)
Servo Interface -- 3-pin header (Signal, VCC, GND) for connecting a standard hobby servo
Serial Interface Header -- D0 (RX), D1 (TX), 5V, GND for APC220 radio, Bluetooth, voice modules, and more
Free PWM Pins Header -- Breakout header for unused pins D5, D6, D9, and A5 for your own components
On-Board Reset Button -- Convenient reset without reaching under the shield

📐 SpecificationsCompatibilityArduino UNO R3, Leonardo, MEGA2560 (R3-type headers)Operating Voltage5V DC (powered via Arduino board)Display4-digit 7-segment LED (common cathode)Display Driver2× 74HC595 serial-to-parallel shift registersLEDs4× surface mount (active LOW, pins D10–D13)Buttons3× tactile push buttons (active LOW, pins A1–A3)BuzzerPiezo buzzer with transistor driver (pin D3)Potentiometer#3296 10KΩ multi-turn trimpot (pin A0)Sensor InterfacesDS18B20 (digital), LM35 (analog) -- shared header on A4IR Receiver InterfacePin D2 -- compatible with 1838B IR receiverServo Interface3-pin header (Signal, VCC, GND)Serial InterfaceD0 (RX), D1 (TX), 5V, GNDFree PinsD5, D6, D9 (PWM), A5Connector TypeStandard Arduino R3-type pin headersDimensionsApprox. 66 × 54 × 21 mm (2.6 × 2.1 × 0.83 inches) L × W × H📦 What\'s in the Box

1x Multi-Function Prototyping / Expansion Shield for Arduino
Link to online documentation, including pinout schematic and links to sample projects

Arduino board, external sensors (DS18B20, LM35, IR receiver), servo motors, and serial communication modules are not included.

🛒 What You\'ll Need

Arduino-compatible UNO R3, Leonardo, or MEGA2560 -- The host controller board (required)
USB Cable -- To connect your Arduino to a computer for programming
Arduino IDE -- Free software for writing and uploading sketches
External Sensors (optional) -- DS18B20 or LM35 temperature sensor, 1838B IR receiver, servo motor, or serial communication module

🔌 Compatible With

Arduino UNO R3
Arduino Leonardo
Arduino MEGA2560
Other Arduino-compatible boards with R3-type header layout

🎯 Typical Applications

Learning Arduino programming with built-in I/O components
Prototyping user interfaces with buttons, LEDs, and 7-segment display
Temperature monitoring projects (with external DS18B20 or LM35 sensor)
IR remote control projects (with external 1838B receiver)
Alarm and notification systems using the buzzer
Servo control experiments
Wireless communication prototyping via the serial header
Classroom and workshop instruction for Arduino concepts

⚠️ Important Notes

USB connector clearance: Ensure that the LED display pins on the back of the shield do not touch and short against the Arduino UNO board\'s USB connector. Place an insulator (electrical tape or cardboard) between the two to prevent contact.
Active LOW LEDs: The four on-board LEDs are active LOW -- write LOW to turn them ON and HIGH to turn them OFF.
Active LOW buttons: The three push buttons read LOW when pressed and HIGH when released. Use INPUT_PULLUP mode or the shield\'s built-in pull-up resistors.
Pin conflicts: On-board components are hard-wired to specific pins. Those pins are not available for other uses while the shield is attached. Plan your projects around the free pins (D5, D6, D9, A5).
Servo power: Powering a servo directly from the Arduino\'s 5V pin may cause voltage drops or resets under heavy load. For larger servos, use an external power supply.
Serial pin sharing: Pins D0 and D1 are shared with the Arduino\'s USB serial connection. Disconnect serial modules before uploading new sketches.

🏪 About Envistia Mall

Envistia Mall is a US-based electronics retailer specializing in development boards, sensors, modules, and components for makers, engineers, and educators. We ship from the United States with fast handling times. Product documentation and technical support are available at our dedicated support site.

📦 Fast Free US Shipping | 🔄 Hassle-Free Returns | 📧 Responsive Customer Support

Visit our store for Arduino-compatible boards, sensors, shields, jumper wires, and more accessories for your Arduino projects.