Elecrow
Crowduino Leonardo
The Crowduino Leonardo is a microcontroller board that completely compatible with the Arduino Leonardo. It is based on the ATmega32u4. It has 20 digital inpu...
The Crowduino Leonardo is a microcontroller board that completely compatible with the Arduino Leonardo. It is based on the ATmega32u4. 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.
Features
- Microcontroller: ATmega32u4
- T Working Frequency: 16MHz
- Digital I/O Pins: 20
- PWM Channels:7
- DC Current per I/O Pin 40Ma
- DC Current for 3.3V Pin: 50Ma
- Flash Memory: 32KB of which 4KB used by bootloader
- SRAM:2.5KB
- EEPROM: 32KB
- Power Supply: USB 5V or External Power 7~12V
- I/O Logic:3.3V/5V
Package list
- Crowduino Leonardo board x1
- Micro USB Cable X 1
Wiki & External links
Jargon buster
Plain-language definitions for the technical terms used above.
- Bootloader
- Small starter software on a microcontroller that lets new code be uploaded before the main program runs. Knowing how to enter bootloader mode matters when you need to program the board or recover it after a faulty sketch.
- COM port
- A COM port is the way many computers present a USB-connected serial device to software. It matters because it lets you configure or read the board from a computer using serial terminal tools or navigation software.
- EEPROM
- A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
- Flash memory
- Non-volatile memory that keeps stored data even when power is removed. In this sensor, it matters because enrolled fingerprint templates can remain saved after the project is turned off.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- SRAM
- Fast temporary memory used by a processor while a program is running. More SRAM helps with projects that handle larger data buffers, networking, displays, or more complex code.
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