Arduino Leonardo without headers

Arduino Leonardo Development Boards. Arduino Leonardo Versions:. ; 761-7324 761-7324 with headers ; 761-7315 761-7315 without headers. The Arduino Leonardo is a development board based on the ATmega32u4 microcontroller. What else is on board?. ATmega32u4 Microcontroller 20 x digital I/O pins (7 can be used as PWM outputs) 12 x Analogue inputs 16MHz crystal oscillator 1 x microUSB 1 x power jack 1 x ICSP header 1 x reset button. Operating Voltage : 5V FLASH Memory : 32 KB SRAM : 2.5 KB EEPROM : 1 KB Dimensions : 68.6 x 53.3 mm. What is Arduino?. Arduino is an open-source electronics platform consisting of hardware and software. Every aspect is designed to be straightforward so you can learn to code or design a project, quickly and easily. It ‘s designed for students, programmers, designers, hobbyists and tinkerers. The Arduino open-source software (IDE) is there to help too. It makes is much easier to write code and transfer it to your board.