Mini USB Leonardo Pro ATMEGA32U4 AU Development Board for Arduino

Mini USB Leonardo Pro ATMEGA32U4 AU Development Board for Arduino - Blue

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Mini USB  Leonardo Pro ATMEGA32U4 AU Development Board for Arduino - Blue


ATMega 32U4 AU running at 5V/16MHz

Supported under Arduino IDE v1.0.1

On-Board micro-USB connector for programming

4 x 10-bit ADC pins

12 x Digital I/Os (5 are PWM capable)

Rx and Tx Hardware Serial Connections

Our Smallest Arduino-Compatible Board Yet!


Here at SparkFun, we refuse to leave 'good enough' alone. That's why we're adding to our line-up of Arduino-compatible microcontrollers once more! The Pro Micro is similar to the Pro Mini except with an ATmega32U4 on board. The USB transceiver inside the 32U4 allows us to add USB connectivity on-board and do away with bulky external USB interface.

This tiny little board does all of the neat-o Arduino tricks that you're familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 16MHz and 5V, this board will remind you a lot of your other favorite Arduino-compatible boards but this little guy can go just about anywhere. There is a voltage regulator on board so it can accept voltage up to 12VDC. If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC.

This latest revision corrects the silk error from the last version of the board so that pin 14 is correctly labeled. We've also added a PTC fuse and diode protection to the power circuit and corrected the RX and TX LED circuit.

Not sure which Arduino or Arduino-compatible board is right for you? Check out our Arduino Buying Guide!


MaterialFR4 + PCB
ChipsetATMEGA32U4 AU
Hardware PlatformArduino
English Manual / SpecNo
Other Features
Other FeaturesA product for Arduino that works with official Arduino boards; More information, pls refer to:
Dimensions & Weight
Dimensions 1.65 in x 0.91 in x 0.24 in (4.2 cm x 2.3 cm x 0.6 cm)
Weight 0.18 oz (5 g)
Packing List
1 x Board
2 x Pin headers

All packages from are sent without DX logo or any information indicating Due to package variations from suppliers, the product packaging customers receive may be different from the images displayed.

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Rate US$8.25 shipped US$8.22 shipped US$8.19 shipped

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