--- product_id: 283529595 title: "Leonardo R3 Development Board with USB Cable for Arduino" brand: "keyestudio" price: "156 zł" currency: PLN in_stock: true reviews_count: 8 category: "Keyestudio" url: https://www.desertcart.pl/products/283529595-leonardo-r3-development-board-with-usb-cable-for-arduino store_origin: PL region: Poland --- # 7 PWM Ports for Precision Control 12 Analog Input Ports 23 Digital I/O Ports Leonardo R3 Development Board with USB Cable for Arduino **Brand:** keyestudio **Price:** 156 zł **Availability:** ✅ In Stock ## Summary > 🚀 Unlock your innovation with KEYESTUDIO Leonardo R3 — where pro-grade meets open-source cool! ## Quick Answers - **What is this?** Leonardo R3 Development Board with USB Cable for Arduino by keyestudio - **How much does it cost?** 156 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/283529595-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 - • **Rich Sensor Input:** 12 analog inputs capture detailed environmental data for smarter, responsive designs. - • **Precision PWM Control:** 7 PWM ports deliver fine-tuned motor and LED management for professional-grade prototypes. - • **Robust Power Handling:** Supports 5V working voltage with up to 50mA current per port, ensuring stable performance under load. - • **Versatile Connectivity:** 23 digital I/O ports empower complex projects with seamless hardware integration. - • **Certified Quality & Eco-Friendly:** FCC & CE certified with environmentally conscious manufacturing—build your future responsibly. ## Overview The KEYESTUDIO Leonardo R3 Development Board is a fully compatible Arduino IDE board featuring an ATMEGA 32u4 chip, 23 digital I/O ports, 7 PWM ports, and 12 analog inputs. It operates at 5V with recommended input voltage of 7-12V, supports up to 50mA current per port, and is FCC & CE certified for quality and eco-friendly production. Ideal for millennial makers seeking reliable, versatile prototyping with a sleek yellow-black design. ## Description Specification Controller: ATmega32u4 Working frequency: 16 MHz Working voltage: 5V Input voltage (recommended): 7-12v Digital I/O port: 23 PWM channel: 7 Analog input: 12 Maximum allowable current of 5V digital/analog port: 40 mA Maximum allowable current of 3.3V digital/analog port: 50 mA Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by boot loader SRAM: 2.5 KB (ATmega32u4) EEPROM: 1 KB (ATmega32u4) Other related instructions Digital IO port: 23 (D0 - D13, D14-MISO, D15-SCK, D16-MOSI, D18-23 [A0-A5]) Analog input: 12 (A0 - A5, D4 - A6, D6 - A7, D8 - A8, D9 - A9, D10 - A10, D12-A11) Serial communication: D0 (RX) and D1 (TX) IIC communication: D2 (SDA) and D3 (SCL) External interrupt: D3 (interrupt 0), D2 (interrupt 1), D0 (interrupt 2), D1 (interrupt 3) and D7 (interrupt 4) PWM port: D3, D5, D6, D9, D10, D11 and D13 SPI: ICSP pins.Support SPI communication by using the SPI library. It is important to note that SPI pins do not connect to any number I/O pins like UNO, they can only work on the ICSP port.This means that if your expansion board has no ICSP pin connected to the 6 feet, it will not work. LED: 13. There is a built-in LED on the digital pin 13. When the pins are high level, LED is bright;when the pins are low level,the LED is not bright. List: 1 x keyestudio Leonardo R3 Development Board 1 x Usb Cable 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 | #4,616 in Computers ( See Top 100 in Computers ) #42 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 618 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 | 0.13 Pounds | | 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 | | 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 ![Leonardo R3 Development Board with USB Cable for Arduino - Image 1](https://m.media-amazon.com/images/I/61w4INl9jaL.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.pl/products/283529595-leonardo-r3-development-board-with-usb-cable-for-arduino](https://www.desertcart.pl/products/283529595-leonardo-r3-development-board-with-usb-cable-for-arduino) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-27*