SparkFun
Pro Micro - 5V/16MHz
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 Mi...
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: 9 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!
Dimensions: 1.3x0.7"
Features:
- ATmega32U4 running at 5V/16MHz
- Supported under Arduino IDE v1.0.1
- On-Board micro-USB connector for programming
- 9 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!
Documents:
- Schematic
- Eagle Files
- Hookup Guide
- Graphical Datasheet
- Datasheet (ATmega32U4)
- Firmware Note
- Arduino Addon Files
- Arduino Addon Files (IDE 1.5+)
- GitHub (Design Files)
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- IDE
- Short for Integrated Development Environment, a program used to write, run and manage code. It matters because some learners prefer a traditional coding workspace instead of a guided notebook-style lesson.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- PTC fuse
- A resettable fuse that increases its resistance when too much current flows, helping protect the board from short circuits or overloads. It matters because it can recover after a fault instead of needing replacement like a traditional fuse.
- 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.
Find this product in
Brands
ATmega32U4 Datasheet
Datasheet · 8.7 MB · Click any page to view full size
Pro Micro Schematic
Schematic · 566.9 KB · Click any page to view full size
Pro Micro Graphical Datasheet
Datasheet · 474.4 KB · Click any page to view full size
Pro Micro Firmware Note
Firmware · 2.9 MB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 955.3 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
