Arduino Uno R3 Original – ATmega328P Microcontroller Board
Arduino Uno R3 – ATmega328P Microcontroller Board
The Arduino Uno R3 is the most widely used microcontroller board, built around the ATmega328P. It provides 14 digital I/O pins, 6 analog inputs, a 16 MHz quartz crystal, USB connection, and a power jack. Whether you're a beginner learning electronics or a professional prototyping a new product, the Uno R3 is the reliable, go-to board for countless projects.
Key Specifications
| Specification | Value |
|---|---|
| Microcontroller | ATmega328P |
| Operating Voltage | 5V |
| Digital I/O Pins | 14 (6 provide PWM output) |
| Analog Input Pins | 6 |
| Flash Memory | 32 KB (0.5 KB used by bootloader) |
What You Can Build With This
- Automated plant watering system using a soil moisture sensor
- Bluetooth-controlled robot with motor driver
- IoT weather station with DHT11 and ESP8266
- Interactive LED cube using PWM and shift registers
Compatibility
The Arduino Uno R3 works with most Arduino shields and sensors, and is supported across Windows, macOS, and Linux. It operates at 5V logic levels and can be powered via USB or a 7-12V DC adapter through the barrel jack. It pairs seamlessly with common modules like LCD displays, motor drivers, and wireless transceivers.
Wiring Notes
Connect VIN to a 7-12V DC adapter or USB for power. Use digital pins 0 and 1 for serial communication; avoid using them when uploading code. PWM outputs are on pins 3,5,6,9,10,11. For a quick test, connect an LED with a 220Ω resistor to pin 13.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino IDE?
Yes, the Arduino Uno R3 is fully compatible with the Arduino IDE. Simply connect via USB and select 'Arduino Uno' from the board menu.
Can I power this board with a 9V battery?
Yes, you can power the Uno R3 with a 9V battery connected to the barrel jack or VIN pin. The onboard voltage regulator handles 7-12V input.
Does this come with a USB cable?
No, the package includes only the Arduino Uno R3 board. You can use any standard USB-A to USB-B cable, commonly used for printers.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items