--- product_id: 283529595 title: "KEYESTUDIO Leonardo R3 Development Board with USB Cable for Arduino" brand: "keyestudio" price: "€ 43.60" currency: EUR in_stock: true reviews_count: 8 category: "Keyestudio" url: https://www.desertcart.be/products/283529595-keyestudio-leonardo-r3-development-board-with-usb-cable-for-arduino store_origin: BE region: Belgium --- # 5V Operating Voltage 20 Digital I/O pins ATmega32u4 MCU, 16MHz KEYESTUDIO Leonardo R3 Development Board with USB Cable for Arduino **Brand:** keyestudio **Price:** € 43.60 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your maker game with the sleek, powerful Leonardo R3! ## Quick Answers - **What is this?** KEYESTUDIO Leonardo R3 Development Board with USB Cable for Arduino by keyestudio - **How much does it cost?** € 43.60 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/283529595-keyestudio-leonardo-r3-development-board-with-usb-cable-for-arduino) ## Best For - keyestudio enthusiasts ## Why This Product - Trusted keyestudio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Memory Storage:** 32KB flash memory plus 2.5KB SRAM and 1KB EEPROM for advanced program handling - • **Power-Optimized Design:** Stable 5V operating voltage with 7-12V input range for flexible power options - • **Versatile Connectivity:** 20 digital I/O pins with 7 PWM outputs for complex projects - • **Built-in USB Communication:** ATmega32u4 chip integrates USB, eliminating extra serial chips for seamless coding - • **Distinctive Style & Quality:** Eye-catching yellow-black design with FCC & CE certified eco-friendly build ## Overview The KEYESTUDIO Leonardo R3 Development Board is a high-performance, ATmega32u4-based microcontroller board featuring 20 digital I/O pins (7 PWM), 12 analog inputs, and built-in USB communication. Operating at 5V with a 16MHz clock speed, it offers 32KB flash memory and robust connectivity options. Its unique yellow-black design and eco-certified manufacturing make it a standout choice for professional and hobbyist developers seeking reliable, versatile hardware. ## Description Product description KEYESTUDIO Leonardo R3 Board KEYESTUDIO Leonardo R3 is an ATmega32u4 microcontroller board. The Leonardo differs from other Arduino boards using separate USB-Serial chip in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. Power Supply The board has 20 digital input/output pins (of which 7 can be used as PWM outputs), 12 analog inputs, a 16MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. The keyestudio Leonardo can be powered via the micro USB connection, or via an external power supply jack (DC 7-12V) or even with female headers Vin /GND (DC 7-12V). Memory Store The Atmega32u4 of KEYESTUDIO Leonardo R3 Board has 32KB of flash memory for storing code (of which 4 KB is used for the bootloader), 2.5KB of SRAM and 1KB of EEPROM (which can be read and written with the Eeprom library). Board Model Neat little Leonardo r3 board works just like the original! Another great Arduino alternative. It works fine and the quality is good. The yellow and black theme is unique. This is an experiment to plot heart rate graph. Place your finger on the sensor, and the OLED will plot the corresponding heart rate graph. This is an experiment of RGB gradient with distance. By measuring the distance with ultrasonic waves, the color of the RGB module will gradually change. This is a character input experiment. After uploading the code, point the mouse cursor to the blank area of the text, and reconnect the board,the preset characters will be input. Digital I/O pins: D0-D13 and A0-A5 (D18-D23); the ICSP pins can be used as digital pins. Analog Inputs: A0-A5, A6-A11, that is, D4 (A6)、D6 (A7)、D8 (A8)、D9 (A9)、D10 (A10) and D12 (A11) PWM pins: D3, D5, D6, D9, D10, D11 and D13. External Interrupts: D3(interrupt0);D2(interrupt1); D0 (interrupt2), D1(interrupt3), D7(interrupt4). Serial communication: D0 (RX) and D1 (TX) Technical Specification Microcontroller: Atmega32u4 Operating Voltage：5V Input voltage (recommended): DC7-12v Digital I/O Pins: 20 (of which 7 provide PWM output) PWM Digital I/O Pins: 7 Analog Input Pins: 12 DC Current per I/O Pin: 40mA DC Current for 3.3V Pin: 50mA Flash Memory: 32KB (ATmega32u4) of which 4KB used by boot loader SRAM: 2.5 KB (ATmega32u4); EEPROM: 1 KB (ATmega32u4); Clock Speed: 16MHz LED_BUILTIN: D13 Please note Select the Arduino Board When you Open the Arduino IDE, you’ll need to click the “Tools”, then select the Board that corresponds to your Arduino. NOTE Please note that after downloading the Arduino program, before driving the leonardo board. Please select the correct driver leonardo motherboard on the ARDUINO IDE , otherwise the board cannot be driven normally. Please see the picture show. Review: Good quality with affordable price - This development board offers incredible value with its exceptional quality and impressive performance, making it a top choice for Arduino enthusiasts. Highly recommended. Review: Ver good quality - Highly recommend the Leonardo developing board, the time response to the quality to the number of inputs/outputs and its variations is very competitive to other developing board in economical cost. ## Features - Please NOTE: Open the Arduino IDE, you’ll need to click the “Tools”, then select the Board that corresponds to your Arduino. If you don't choose the correct development board type, it will cause the compilation to fail to transfer. So this is a place that needs special attention.KEYESTUDIO leonardo R3 is fully compatible with the official version, with the same circuit array - It is our newest open-source controller, which has cool yellow-black design and twenty-three digital I/O ports, seven PWM ports and twelve analog input ports - Maximum allowable current of 5V digital/analog port: 40 mA, and of 3.3V digital/analog port: 50 mA; Working voltage: 5V; Input voltage (recommended) : 7-12v - Has fcc and ce certification that they are made from environmentally friendly production technology and materials, made function,voltage, current testing before packaging - Main control chip is ATMEGA 32u4, adopting the United States ATMEL original. 【Tutorial download: 】https://fs.keyestudio.com/KS0248 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0786LJQ8K | | Best Sellers Rank | #27,637 in Computers ( See Top 100 in Computers ) #362 in Single-Board Computers | | Brand | KEYESTUDIO | | Built-In Media | Keybord, Mouse | | CPU Model | Intel Core i9 | | CPU model | Intel Core i9 | | CPU speed | 16 MHz | | Compatible Devices | Personal Computer, Laptop, Tablet | | Connectivity Technology | USB | | Customer Reviews | 4.6 out of 5 stars 624 Reviews | | Installed RAM memory size | 5 MB | | Item Dimensions L x W x H | 6.9L x 5.3W x 0.4H centimeters | | Item Weight | 59 g | | Manufacturer | KEYESTUDIO | | Memory Storage Capacity | 32 KB | | Memory storage capacity | 32 KB | | Mfr Part Number | ks0248 | | Model Name | ATMEGA32U4-AU | | Model Number | KE-0011 | | Model name | ATMEGA32U4-AU | | Operating System | Linux | | Processor Brand | Microchip Technology | | Processor Count | 1 | | Processor Speed | 16 MHz | | RAM Memory Installed | 5 MB | | RAM Memory Technology | no | | UPC | 600346571761 606184533497 600346574199 | | Unit Count | 1 Count | | Wireless Compability | Bluetooth | ## Product Details - **Brand:** KEYESTUDIO - **Model name:** ATMEGA32U4-AU - **Installed RAM memory size:** 5 MB - **Memory storage capacity:** 32 KB - **CPU model:** Intel Core i9 ## Images ![KEYESTUDIO Leonardo R3 Development Board with USB Cable for Arduino - Image 1](https://m.media-amazon.com/images/I/61w4INl9jaL.jpg) ![KEYESTUDIO Leonardo R3 Development Board with USB Cable for Arduino - Image 2](https://m.media-amazon.com/images/I/61rc9Fii1AL.jpg) ![KEYESTUDIO Leonardo R3 Development Board with USB Cable for Arduino - Image 3](https://m.media-amazon.com/images/I/71qAyefUQjL.jpg) ![KEYESTUDIO Leonardo R3 Development Board with USB Cable for Arduino - Image 4](https://m.media-amazon.com/images/I/71TTOI+qaXL.jpg) ![KEYESTUDIO Leonardo R3 Development Board with USB Cable for Arduino - Image 5](https://m.media-amazon.com/images/I/61kpouMDzBL.jpg) ## Questions & Answers **Q: is this leonardo HID compatible?** A: Yes **Q: Is this the same as a normal leonardo, or does the "development" in the name imply some other functionality?** A: I was looking for an UNO R3 (2016!) for a Grove sensor project. It is a regular, normal UNO board. I used the Arduino IDE to program Seeed Studio's Grove watering, temperature sensors. I also purchased a similar board "MakerBest Hight Quality Compatible Arduino UNO R3 ATmega328P Development Kits " for Elenco's Snapno kit. Both work fine and both for developing projects using UNO boards. Hope this helps **Q: will this device run micropython?** A: sorry ,it can't **Q: Is there a program to be installed?** A: It's Ardunio-based, so you'll have to write the code and load it in. There are a lot of tutorials out on the web and pre-existing code that make it easy (or easier than starting from scratch). ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality with affordable price *by A***B on 8 July 2023* This development board offers incredible value with its exceptional quality and impressive performance, making it a top choice for Arduino enthusiasts. Highly recommended. ### ⭐⭐⭐⭐⭐ Ver good quality *by A***J on 24 May 2023* Highly recommend the Leonardo developing board, the time response to the quality to the number of inputs/outputs and its variations is very competitive to other developing board in economical cost. ### ⭐⭐⭐⭐⭐ Perfect! *by L***R on 21 June 2023* Does exactly what I needed it to do. It arrived quickly and works as expected with no problems. Price is better than other options. Highly recommended. ## Frequently Bought Together - KEYESTUDIO Leonardo R3 Microcontroller Development Board with USB Cable Kit for Arduino Project - EDGELEC 120pcs Breadboard Jumper Wires 10cm 15cm 20cm 30cm 40cm 50 cm 100cm Wire Length Optional Dupont Cable Assorted Kit Male to Female Male to Male Female to Female Multicolored Ribbon Cables - WWZMDiB Mini USB 2.0 to TTL Converter Serial Adapter 3.3V 5V Compatible with CP2102 Chip UART Programming --- ## 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.be/products/283529595-keyestudio-leonardo-r3-development-board-with-usb-cable-for-arduino](https://www.desertcart.be/products/283529595-keyestudio-leonardo-r3-development-board-with-usb-cable-for-arduino) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-29*