This product is no longer available
We no longer stock Arduino Leonardo ATmega32u4 without headers, but here are current alternatives in Arduino Education.
Arduino Leonardo ATmega32u4 without headers
Discontinued
The Arduino Leonardo is a microcontroller board based on the ATmega32U4, featuring built-in USB communication that allows it to appear as a keyboard, mouse, or serial device to a connected computer — no secondary USB chip required. This version ships without headers for an ultra-thin, lightweight form factor ideal for embedded projects and custom installations.
With 20 digital I/O pins (7 PWM, 12 analog inputs), a 16MHz crystal oscillator, micro USB connection, power jack footprint, and ICSP header breakout, the Leonardo contains everything needed to get started. Also available with pre-soldered headers for immediate breadboard and shield use.
Key Features
- Native USB – Built-in USB on the ATmega32U4 enables keyboard, mouse, and serial device emulation
- No Headers – Ultra-thin and lightweight; solder your own headers or wire directly
- 20 Digital I/O Pins – 7 usable as PWM outputs, with 40mA per pin
- 12 Analog Inputs – 10-bit resolution on pins A0–A11
- Micro USB – Connect directly to a computer for power and programming
Specifications
- Microcontroller – ATmega32U4
- Operating Voltage – 5V
- Input Voltage – 7–12V recommended
- Digital I/O Pins – 20
- PWM Channels – 7
- Analog Input Channels – 12
- Flash Memory – 32KB (4KB used by bootloader)
- SRAM – 2.5KB
- EEPROM – 1KB
- Clock Speed – 16MHz
Ideal For
- Embedded projects requiring a thin, headerless board
- USB HID projects (custom keyboards, mice, game controllers)
- Custom installations with direct wiring
Package Contents
- 1× Arduino Leonardo ATmega32U4 (without headers)
