ATmega32U4 leonardo R3 development board
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ATmega32U4 leonardo R3 development board

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$15.00 $16.99
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The keyestudio Leonardo is a microcontroller board based on the ATmega32u4 (datasheet). It is an easy-to-use open source hardware. It has 20 digital input/output pins (of which 7 can be used as PWM outputs), 12 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. Note that ICSP (In-Circuit Serial Programming) header can not only program the firmware to Atmega32u4, but also be used as SPI communication interface.

The keyestudio Leonardo can be powered via the micro USB connection, or via an external power supply jack (DC 7-12V) or even with female headers Vin/GND (DC 7-12V).

The Leonardo differs from other Arduino boards using separate USB-Serial chip 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.

 

Specifications

Microcontroller ATmega32u4
Operating Voltage 5V
Recommended Input Voltage 7-12V
Digital I/O Pins 20 (7 PWM output)
Analogue Input Pins 12
DC Current per I/O Pin 40mA
DC Current per 3.3V Pin 50mA
Flash Memory 32 KB of which 4 Kb used by bootloader
SRAM 2.5KB
EEPROM 1KB
Clock Speed 16MHz

The keyestudio Leonardo is a microcontroller board based on the ATmega32u4 (datasheet). It is an easy-to-use open source hardware. It has 20 digital input/output pins (of which 7 can be used as PWM outputs), 12 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. Note that ICSP (In-Circuit Serial Programming) header can not only program the firmware to Atmega32u4, but also be used as SPI communication interface.

The keyestudio Leonardo can be powered via the micro USB connection, or via an external power supply jack (DC 7-12V) or even with female headers Vin/GND (DC 7-12V).

The Leonardo differs from other Arduino boards using separate USB-Serial chip 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.

 

Specifications

Microcontroller ATmega32u4
Operating Voltage 5V
Recommended Input Voltage 7-12V
Digital I/O Pins 20 (7 PWM output)
Analogue Input Pins 12
DC Current per I/O Pin 40mA
DC Current per 3.3V Pin 50mA
Flash Memory 32 KB of which 4 Kb used by bootloader
SRAM 2.5KB
EEPROM 1KB
Clock Speed 16MHz