Welcome to the Arduino Uno Pin Diagram Explanation user manual, your ultimate resource for understanding and using your new product. Compatible Accessories This section lists compatible accessories ...

Circuit Diagram and Explanation. As shown in the above tachometer circuit, it contains Arduino Pro Mini, IR sensor ... is directly connected to pin 18 (A4). Vcc and GND are connected to Vcc and GND of ...

Pin 2 on the Arduino schematic is really GPIO2 on the NINA, therefore it should not be labeled GPIO34. This is confirmed by the fact that the pin numbering on the Arduino schematic matches the pin ...