Here is the diagram of my Arduino infrared close proximity sensor. As you can see, the core part of my experimental setup is an Arduino UNO, but other compatible microcontrollers can also be employed.

As seen in the diagram below, two momentary pushbutton switches are wired to D4 and D5 to control the two output channels D8 and D9. This Arduino Uno setup can be powered by a 6F22 9V battery or other ...

The official Arduino team has this week revealed ... voltage and form factor are unchanged from UNO R3, ensuring maximum hardware and electrical compatibility with existing shields and projects.