The Arduino Leonardo Pro Micro utilizes an ATMega32U4 –Offering even more features than a full-sized Leonardo, but at less than a third of the size.
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When it comes to offering power, functionality and native connectivity in a small form factor, no Arduino boards do it better than the Arduino Leonardo Pro Micro. Equipped with all of the fancy features of the standard Leonardo, but at less than a third of the size, this microcontroller board utilizes an ATMega32U4 at 16MHz/5V.
One of the best features of this board is that it has native USB connectivity without the bulky external USB interface, which makes a very large difference in very small, but complex, projects. Furthermore, it has 4 channels of 10-bit ADC, or Analog to Digital Conversion, 12 digital I/O pins, 5 PWM pins, as well as hardware serial connections Rx and Tx – which are unique features compared to other boards of similar form factor.
The Leonardo Pro Micro also comes with a built-in voltage regulator, allowing for it to accept voltages of up to 12VDC. Just be sure to connect the power source to RAW if you are utilizing unregulated power, rather than typically plugging it into VCC from a regulated power source.
Additionally, when uploading sketches, it’s critical to ensure the voltage is set correctly, as uploading a sketch with the wrong voltage or current parameters can cause serious and difficult-to-fix problems.
Input Voltage (Regulated)
– 5V DC/500mA into VCC Pin
Input Voltage (Unregulated)
– 6V to 12V DC into RAW Pin
Digital I/O Pins
– 4 x 10-bit
Hardware Serial Connections
– Rx and Tx
– 3.30cm x 1.77cm
– ± 6.5g
General Uses and Applications
With so much functionality in such a small-sized package, the Arduino Leonardo Pro Micro is very often used for robotics and other projects requiring discrete design with limited space. Since it can be programmed via native USB, it is also very accessible, allowing for it to be installed within tight spaces and then programmed via a small cable. As such, Makers have utilized these boards for the following, as well as many other, projects:
Despite the small size of this Leonardo Pro Micro, it certainly packs a punch in terms of power and functionality. And with so many natively integrated components, it is the ideal microcontroller board for compact, discrete and bite-sized projects.
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