Download Arduino Uno R3 Icsp Pinout Gallery. Six of the 14 digital i/o pins are able to produce a pwm signal. However my arduino does not have those pins.

Arduino Leonardo Pinout
Arduino Leonardo Pinout from www.electroschematics.com
Arduino mega r3 has a voltage regulator for 5v and 3.3v supply for arduino controller and sensor. Six of the 14 digital i/o pins are able to produce a pwm signal. Usb (programming with atmega 8), icsp (programming), spi, i2c and usart.

As aurdino is an open source.

By karthik_innovator in circuits arduino. The same connection could be made to the icsp of the uno following the pinout explained in the page. However my arduino does not have those pins. When you send commands, it reads data fromthe s.