--- product_id: 254187770 title: "ELEGOO UNO R3 Board ATmega328P" brand: "elegoo" price: "€ 39.64" currency: EUR in_stock: true reviews_count: 5 category: "Elegoo" url: https://www.desertcart.pt/products/254187770-elegoo-uno-r3-board-atmega328p store_origin: PT region: Portugal --- # 16MHz clock speed for fast processing Supports 7-12V DC input with USB 5V power PTC resettable fuse for short-circuit protection ELEGOO UNO R3 Board ATmega328P **Brand:** elegoo **Price:** € 39.64 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your DIY game with ELEGOO UNO R3 – where speed meets reliability! ## Quick Answers - **What is this?** ELEGOO UNO R3 Board ATmega328P by elegoo - **How much does it cost?** € 39.64 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/254187770-elegoo-uno-r3-board-atmega328p) ## Best For - elegoo enthusiasts ## Why This Product - Trusted elegoo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built-in Safety Fuse:** Protect your investment with a resettable fuse that guards against wiring mishaps. - • **Flexible Power Options:** Seamlessly power your projects via USB 5V or 7-12V DC input for ultimate versatility. - • **Blazing Fast 16MHz Performance:** Experience smooth, responsive project execution with a high-speed ATmega328P microcontroller. - • **Plug & Play Arduino IDE Compatibility:** Jumpstart your coding with full support for the Arduino IDE, perfect for pros and makers alike. - • **Clear I/O Labeling for Effortless Wiring:** Spend less time guessing and more time building with clearly marked female header connectors. ## Overview The ELEGOO UNO R3 Board features an ATmega328P microcontroller running at 16MHz, with an ATmega16U2 USB-to-serial interface chip for faster data transfer. It supports flexible power inputs (USB 5V or 7-12V DC) and includes a PTC resettable fuse for protection against wiring errors. Fully compatible with Arduino IDE and existing shields, it offers 14 digital I/O pins, 8 analog inputs, and 32KB flash memory, making it a reliable and versatile choice for professional and hobbyist electronics projects. ## Description ----The RX and TX LEDs on the board will flash when data is being transmitted via the USB-to-serial chip and USB connection to the computer.----The ELEGOO R3 puts SDA and SCL pins beside the AREF. Besides, there are two new pins placed near the RESET pin. One is the IOREF that allows the shields to adapt to the voltage provided from the board and the other one is reserved for future purposes. The ELEGOO R3 works with all existing shields and can adapt to new shields which use these additional pins.Features* ATmega328P microcontroller* Input voltage - 7-12V* 5V Electric current: 500MA* 3.3V Electric current: 50MA* 14 Digital I/O Pins (6 PWM outputs)* 8 Analog Inputs* 32k Flash Memory* 16Mhz Clock SpeedComponent listing:1pcs ELEGOO R3 Development Board1 pcs USB cableWe have the manufacture factory, making productions and selling by ourselves.So we can control the quality of our productions by ourselves for you.We’d like to receive your valuable suggestions for our products and make your idea come true. Review: Amazing board! - Forget the name brand boards, you cannot beat these things for the price. I got 4 of them and never had any issues, great speed, board looks to be very good quality. I've ran cncs with them and there super reliable. 5 stars baby Review: work as described - Product is very good and work as described Price is competitive ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01EWOE0UU | | Are Batteries Included | No | | Best Sellers Rank | #75,437 in Computers ( See Top 100 in Computers ) #1,104 in Single-Board Computers | | Brand | ELEGOO | | Color | Black | | Computer Memory Type | 72-Pin EDO SIMM Memory | | Customer Reviews | 4.7 4.7 out of 5 stars (4,805) | | Date First Available | 7 October 2016 | | Graphics Card Description | Integrated | | Graphics RAM Type | DDR DRAM | | Hard Disk Description | HDD | | Hard Drive Interface | ATA-4 | | Item Weight | 27.2 g | | Item model number | EL-CB-001 | | Manufacturer | Elegoo | | Memory Technology | SRAM | | Operating System | Windows 10 | | Optical Drive Type | BD-R | | Processor Brand | Atmel | | Processor Count | 1 | | Processor Speed | 0.02 GHz | | Processor Type | Cortex A8 | | Product Dimensions | 8 x 5.99 x 0.99 cm; 27.22 g | | RAM Size | 2 KB | | Series | ELEGOO UNO R3 Board | | Standing screen display size | 3 | | Wireless Type | Bluetooth | ## Product Details - **Brand:** ELEGOO - **CPU model:** Cortex A8 - **Installed RAM memory size:** 32 KB - **Memory storage capacity:** 32 KB - **Model name:** ELEGOO UNO R3 Board ## Images ![ELEGOO UNO R3 Board ATmega328P - Image 1](https://m.media-amazon.com/images/I/71cvvGHcMwL.jpg) ## Questions & Answers **Q: Is this the same thing as an arduino?** A: Arduino is just a specification for a microcontroller. Although there is an official "Arduino Brand" this model does 100% of what that model does for $5 less. I have a kit that connects every GPIO pin of Arduino, and it connected fine. So for all intents and purposes, this is "the same thing as an arduino." **Q: Ordered two of these and get the same error message: avrdude: ser_open() : can't open device "\\.\COM4": the system cannot find the file specified.** A: When this happens, I've fixed it by closing the Arduino IDE, unplugging my USB cable from the UNO, plugging it back in, and restarting the IDE. (Save the file before closing the IDE, if desired.) This has always corrected the issue for me, even when the IDE shows an Arduino on COM4 and it's selected yet still seems unavailable. **Q: Does this use the CH340 ?** A: No. And no. He wants to know the USB chip, not the MCU chip. The USB chip is a CP2021 or whatever, it isn't the CH340. **Q: is the Elegoo compatible with the official Arduino program? (1.8.1 to be exact)** A: While I have not updated to 1.8.1 yet, I have used it with previous versions with no issues, so I see no reason why it should not work with the latest. I have used 3rd party programs and libraries as well. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing board! *by C***S on 26 March 2026* Forget the name brand boards, you cannot beat these things for the price. I got 4 of them and never had any issues, great speed, board looks to be very good quality. I've ran cncs with them and there super reliable. 5 stars baby ### ⭐⭐⭐⭐⭐ work as described *by M***I on 4 May 2026* Product is very good and work as described Price is competitive ### ⭐⭐⭐⭐⭐ Jättebra köp *by K***. on 12 January 2022* Fungerade precis som jag hade förväntat mig, bra produkt ## Frequently Bought Together - ELEGOO UNO R3 Board ATmega328P with USB Cable(Arduino-Compatible) for Arduino - ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects - ELEGOO 3pcs Breadboard 830 Point Solderless Prototype PCB Board Kit for Arduino Proto Shield Distribution Connecting Blocks --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/254187770-elegoo-uno-r3-board-atmega328p](https://www.desertcart.pt/products/254187770-elegoo-uno-r3-board-atmega328p) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-07-08*