{"product_id":"official-arduino-leonardo-r3-development-board-with-pre-soldered-headers","title":"Official Arduino Leonardo R3 Development Board with Pre-Soldered Headers","description":"\u003ch1\u003eOfficial Arduino Leonardo R3 Development Board with Pre-Soldered Headers\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino Leonardo R3 is a microcontroller board based on the ATmega32u4 chip, featuring built-in USB communication that allows it to emulate a keyboard, mouse, or serial device. Its 20 digital I\/O pins, 12 analog inputs, and 16 MHz clock speed make it ideal for interactive projects and rapid prototyping. The pre-soldered headers let you start building immediately without any soldering.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003eATmega32u4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e20 (7 PWM, 12 analog)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e32 KB (4 KB used by bootloader)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e2.5 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e16 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCustom USB game controller for retro gaming emulators\u003c\/li\u003e\n  \u003cli\u003eMIDI instrument interface for music production\u003c\/li\u003e\n  \u003cli\u003eAutomated keyboard shortcuts for productivity workflows\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-pi-zero-w-mqtt-home-sensor-hub\"\u003eSmart home sensor hub with serial-over-USB data logging\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe Leonardo works seamlessly with the Arduino IDE on Windows, macOS, and Linux. It is electrically compatible with most Arduino shields designed for 5V operation and supports the same library ecosystem as the Uno. Common pairings include motor drivers, relay modules, and sensor shields that use the standard Arduino pinout.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eAll male header pins are pre-soldered, so you can directly insert the board into a breadboard or connect jumper wires. There is no need for external pull-up resistors on the I2C lines; the board includes internal pull-ups that can be enabled in software. The Micro USB port provides both power and programming.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery 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.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Windows 11?\u003c\/summary\u003e\u003cp\u003eYes, the Leonardo is fully compatible with Windows 11. Install the Arduino IDE and the necessary drivers will load automatically when you connect the board via USB.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does the Leonardo differ from the Arduino Uno?\u003c\/summary\u003e\u003cp\u003eThe Leonardo uses the ATmega32u4 chip, which has built-in USB communication, allowing it to emulate a keyboard or mouse. The Uno requires an external USB-to-serial chip and does not support native USB HID without extra software.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power the board with a 9V battery?\u003c\/summary\u003e\u003cp\u003eYes, the Leonardo can be powered via the Vin pin with 7-12V. A 9V battery works, but ensure the connector polarity matches the board: positive to Vin, ground to GND.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery 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.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444946133357,"sku":"CDN-0044","price":1850.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_9b204906-71ee-4b1d-9d56-17d7cdf959d1.jpg?v=1781512116","url":"https:\/\/compoden.com\/products\/official-arduino-leonardo-r3-development-board-with-pre-soldered-headers","provider":"Compoden","version":"1.0","type":"link"}