Arduino 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 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 cir­cuitFEATURES:ATmega32U4 run­ning at 5V/16MHzSup­port­ed under Arduino IDE v1.0.1 On-Board micro-USB con­nec­tor for pro­gram­ming9x 10-bit ADC pins12x Dig­i­tal I/Os (5 are PWM capa­ble)Rx and Tx Hard­ware Ser­i­al Con­nec­tionsOur Small­est Arduino-Com­pat­i­ble Board Yet!1.3“x0.7″ DOCUMENTSSchemat­icEagle FilesHookup GuideGraph­i­cal DatasheetDatasheet (ATmega32U4)Firmware NoteArduino Addon FilesArduino Addon Files (IDE 1.5 )GitHub (Design Files)