Upgrade Now! You're viewing a clone board. For best performance and official support, check out the Official Arduino UNO R4 EK Minima – ₹100 OFF with code UNO100 Made in India | USB-C | 1-Year Warranty. Uno R3 is one of the widely used and accepted module for prototyping. It has huge user community worldwide. Uno R3 SMD module is based on the Atmega328p-AU MCU of Atmel AVR Family. It is a 8 Bit Microcontroller. This is an entry level development board. But, is not a basic one, it packs 32 KB Flash, 2 KB RAM, and 1 KB of EEPROM. Why Consider the Official Boards? Feature Official Arduino Boards Clone Boards Warranty ✅ 1-Year Official Warranty ❌ None / Limited Build Quality ✅ High-Grade Components ⚠️ Varies Software Support ✅ 100% Compatible ⚠️ May Face Issues Firmware Updates ✅ Regular Official Releases ❌ Rare / None Durability ✅ Long Lifespan & Support ⚠️ Shorter Life Features : 1.0 pinout: added SDA and SCL pins that are near the AREF pin and two other new pins placed near the RESET pin, the IOREF, that allow the shields to adapt to the voltage provided by the board. In the future, shields will be compatible with both the board that uses the AVR, which operates with 5V, and the Arduino Due, which operates with 3.3V. The second one is a not-connected pin; that is the reserve for future purposes. Stronger RESET circuit. Package Includes : 1 x Uno R3 Board without Cable compatible with Arduino Useful Links: Getting Started with Arduino and Genuino products
Specifications
| Operating Voltage | 5 V |
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| Input Voltage | 7 to 12 V |
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| Digital I/O pins | 14 |
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| PWM Pins | 6 |
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| Analog Input pins | 6 |
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| Feature | Official Arduino Boards |
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| Warranty | ✅ 1-Year Official Warranty |
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| Build Quality | ✅ High-Grade Components |
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| Software Support | ✅ 100% Compatible |
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| Firmware Updates | ✅ Regular Official Releases |
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| Durability | ✅ Long Lifespan & Support |
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| Item Type: | Development Board |
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| Board Type: | Uno |
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| With Cable (Y/N): | N |
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| DC Current(A) | 50, per I/O Pin (mA) |
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| Digital I/O Pins | 14 (of which 6 provide PWM output) |
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| EEPROM | 1 KB (ATmega328) |
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| Flash Memory: | 32 KB |
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| Input Voltage (V): | 7-12V |
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| Operating Voltage (VDC): | 5 |
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| PWM Output Pins | 6 |
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| SRAM | 2 KB |
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| Weight (g): | 26 |
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| Color | Blue |
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| Model No. / Name: | UNO Rev R3 |
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| Microcontroller Chip | ATmega328 |
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| Input Voltage (limit) | 6-20V |
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| PWM Digital I/O Pins | 6 |
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| Power Supply Option | DC Jack or USB |
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| Dimensions (L x W x H) mm | 75 x 54 x 12 |
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| On Board LED | Yes |
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| Operating Temperature (°C): | -40 to 90 |
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| Shipping Weight | 0.03 kg |
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| Shipping Dimensions | 10 × 6 × 4 cm |
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