Arduino Leonardo - with Headers

Arduino Leonardo - with Headers
Arduino
Review score
5.0 / 5.0
Item numberA000057
BrandArduino
ModelA000057
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Description

The Arduino Leonardo is a microcontroller board based on the ATmega32u4 (datasheet). It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.


MicrocontrollerATmega32u4
Operating Voltage5V
Input Voltage (Recommended)7-12V
Input Voltage (limits)6-20V
Digital I/O Pins20
PWM Channels7
Analog Input Channels12
DC Current per I/O Pin40 mA
DC Current for 3.3V Pin50 mA
Flash Memory32 KB (ATmega32u4) of which 4 KB used by bootloader
SRAM2.5 KB (ATmega32u4)
EEPROM1 KB (ATmega32u4)
Clock Speed16 MHz
Lenght68.6 mm
Width53.3 mm
Weight20 g

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Reviews

The Netherlands
5 stars
12 analog inputs Losse UART/SPI/I2C Fully UNO shield compatible. Micro-USB USB-HID support Fast compile and upload due to compact code Slightly more expensive than Leonardo clone Very sometimes a hic-up when trying to load code while sketching on 2 ports Serial.write
The Arduino beginner board. Forget the more expensive UNO, start with this one. You have a lot of advantages: 12 analog inputs, SPI, I2C and UART are disconnected from the normal digital pins, so you can connect a lot more. Serial.print works in combination with a UART external module such as MIDI or a GSM module. USB HID support for mouse / keyboard controllers. Micro USB instead of large USB, I always have a loop of chargers from old phones, ideal power supply. Why this original and not clone Chinese? The headers in particular are much better, with clear print on the sides so that you can quickly see which pins you are using. Nice bottom plate and quick-start manual, and you help to support the platform.
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