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Arduino Leonardo without Headers
The Arduino Leonardo without Headers is a compact, powerful microcontroller board based on the ATmega32U4 chip with built-in USB communication — no external USB-to-serial converter needed. Shipped without pre-soldered pin headers, this variant gives you complete flexibility to solder your own connectors, mount it flush on custom PCBs, or integrate it directly into finished enclosures. Available now at The Engineer Store, Bengaluru with fast shipping, 1-year warranty, and dedicated technical support.
Specifications
| Board | Arduino Leonardo (Headerless Variant) |
| Microcontroller | ATmega32U4 |
| Operating Voltage | 5V |
| Input Voltage (Recommended) | 7–12V |
| Input Voltage (Limit) | 6–20V |
| Digital I/O Pins | 20 (7 capable of PWM output) |
| Analog Input Pins | 12 |
| DC Current per I/O Pin | 40 mA |
| DC Current for 3.3V Pin | 50 mA |
| Flash Memory | 32 KB (4 KB used by bootloader) |
| SRAM | 2.5 KB |
| EEPROM | 1 KB |
| Clock Speed | 16 MHz |
| USB Connectivity | Built-in USB 2.0 (Micro-USB connector) |
| USB HID Support | Yes — native Keyboard, Mouse, Joystick emulation |
| Communication | UART, SPI, I²C (TWI) |
| Board Dimensions | 68.6 mm × 53.3 mm |
| Weight | ~20 g |
| Headers | Not pre-soldered (headerless version) |
| Origin | Original / Authentic Arduino |
| Warranty | 1 Year Manufacturer |
| Support | Email & WhatsApp 24/7 |
Key Features
- Native USB Communication: The ATmega32U4 handles USB directly on-chip, eliminating the need for a secondary USB-to-serial processor and enabling the board to appear as a mouse, keyboard, joystick, or custom HID device to any connected computer.
- Headerless Design: Arrives without soldered pin headers, giving you the freedom to solder standard male/female headers, right-angle connectors, or wire directly to the pads for low-profile and custom enclosure builds.
- 20 Digital I/O Pins: Generous GPIO count with 7 PWM-capable pins for motor control, LED dimming, and servo driving.
- 12 Analog Inputs: More analog channels than the Uno, ideal for sensor-heavy projects that need multiple simultaneous analog readings.
- Full Arduino IDE Compatibility: Program seamlessly using the Arduino IDE with the extensive library ecosystem, examples, and community resources.
- Compact & Lightweight: Standard Arduino form factor at just ~20 g makes it easy to embed in wearables, drones, and portable devices.
- Micro-USB Connector: Common Micro-USB cable for programming and power — no special cables required.
Why Choose the Arduino Leonardo without Headers?
- 100% Authentic Arduino: Sourced directly from authorized distributors — genuine ATmega32U4, genuine bootloader, full Arduino ecosystem compatibility guaranteed.
- Custom Integration Freedom: The headerless format is purpose-built for makers who want to solder their own connectors or wire directly to pads for permanent installations and custom PCB stacking.
- Native USB HID — A Unique Advantage: Unlike the Uno or Nano, the Leonardo can natively emulate USB devices. Build custom keyboards, game controllers, MIDI instruments, or automated input devices without additional hardware.
- 2–3 Day Shipping from Bengaluru: Ships from our Bengaluru warehouse to most locations across India. Same-day delivery available within Bengaluru.
- Expert Technical Support Included: Our engineering team provides 24/7 assistance via email and WhatsApp — from wiring help to code debugging.
- 1-Year Manufacturer Warranty: Full coverage against manufacturing defects with hassle-free replacement.
Project Ideas
- Custom USB Keyboard / Macro Pad: Leverage native HID support to build a programmable keyboard, shortcut pad for video editing, or a stream deck alternative with physical buttons and rotary encoders.
- USB Game Controller / Joystick: Create a custom arcade stick, racing wheel interface, or flight simulator controller that registers as a native USB gamepad — no drivers needed.
- MIDI Controller for Music Production: Build a USB MIDI controller with faders
Arduino Leonardo without Headers
The Arduino Leonardo without Headers is a compact, powerful microcontroller board based on the ATmega32U4 chip with built-in USB communication — no external USB-to-serial converter needed. Shipped without pre-soldered pin headers, this variant gives you complete flexibility to solder your own connectors, mount it flush on custom PCBs, or integrate it directly into finished enclosures. Available now at The Engineer Store, Bengaluru with fast shipping, 1-year warranty, and dedicated technical support.
Specifications
| Board | Arduino Leonardo (Headerless Variant) |
| Microcontroller | ATmega32U4 |
| Operating Voltage | 5V |
| Input Voltage (Recommended) | 7–12V |
| Input Voltage (Limit) | 6–20V |
| Digital I/O Pins | 20 (7 capable of PWM output) |
| Analog Input Pins | 12 |
| DC Current per I/O Pin | 40 mA |
| DC Current for 3.3V Pin | 50 mA |
| Flash Memory | 32 KB (4 KB used by bootloader) |
| SRAM | 2.5 KB |
| EEPROM | 1 KB |
| Clock Speed | 16 MHz |
| USB Connectivity | Built-in USB 2.0 (Micro-USB connector) |
| USB HID Support | Yes — native Keyboard, Mouse, Joystick emulation |
| Communication | UART, SPI, I²C (TWI) |
| Board Dimensions | 68.6 mm × 53.3 mm |
| Weight | ~20 g |
| Headers | Not pre-soldered (headerless version) |
| Origin | Original / Authentic Arduino |
| Warranty | 1 Year Manufacturer |
| Support | Email & WhatsApp 24/7 |
Key Features
- Native USB Communication: The ATmega32U4 handles USB directly on-chip, eliminating the need for a secondary USB-to-serial processor and enabling the board to appear as a mouse, keyboard, joystick, or custom HID device to any connected computer.
- Headerless Design: Arrives without soldered pin headers, giving you the freedom to solder standard male/female headers, right-angle connectors, or wire directly to the pads for low-profile and custom enclosure builds.
- 20 Digital I/O Pins: Generous GPIO count with 7 PWM-capable pins for motor control, LED dimming, and servo driving.
- 12 Analog Inputs: More analog channels than the Uno, ideal for sensor-heavy projects that need multiple simultaneous analog readings.
- Full Arduino IDE Compatibility: Program seamlessly using the Arduino IDE with the extensive library ecosystem, examples, and community resources.
- Compact & Lightweight: Standard Arduino form factor at just ~20 g makes it easy to embed in wearables, drones, and portable devices.
- Micro-USB Connector: Common Micro-USB cable for programming and power — no special cables required.
Why Choose the Arduino Leonardo without Headers?
- 100% Authentic Arduino: Sourced directly from authorized distributors — genuine ATmega32U4, genuine bootloader, full Arduino ecosystem compatibility guaranteed.
- Custom Integration Freedom: The headerless format is purpose-built for makers who want to solder their own connectors or wire directly to pads for permanent installations and custom PCB stacking.
- Native USB HID — A Unique Advantage: Unlike the Uno or Nano, the Leonardo can natively emulate USB devices. Build custom keyboards, game controllers, MIDI instruments, or automated input devices without additional hardware.
- 2–3 Day Shipping from Bengaluru: Ships from our Bengaluru warehouse to most locations across India. Same-day delivery available within Bengaluru.
- Expert Technical Support Included: Our engineering team provides 24/7 assistance via email and WhatsApp — from wiring help to code debugging.
- 1-Year Manufacturer Warranty: Full coverage against manufacturing defects with hassle-free replacement.
Project Ideas
- Custom USB Keyboard / Macro Pad: Leverage native HID support to build a programmable keyboard, shortcut pad for video editing, or a stream deck alternative with physical buttons and rotary encoders.
- USB Game Controller / Joystick: Create a custom arcade stick, racing wheel interface, or flight simulator controller that registers as a native USB gamepad — no drivers needed.
- MIDI Controller for Music Production: Build a USB MIDI controller with faders