Arduino Projects - Circuit Construction First make the circuit connection as shown in fig1.1. The 1st Pin(Vcc) of Bluetooth(HC05) is connect to +5v of Arduino Uno and 10th pin(GND) to Arduino Uno
What is the advantage of Arduino Uno in automatic over and under voltage control? - Amader Electronics
![Arduino UNO Pin Connections. There are total 19 I/O pins. All pins can... | Download Scientific Diagram Arduino UNO Pin Connections. There are total 19 I/O pins. All pins can... | Download Scientific Diagram](https://www.researchgate.net/profile/Husam-Ibrahim-3/publication/341521107/figure/fig2/AS:893276471169024@1589985115115/Arduino-UNO-Pin-Connections-There-are-total-19-I-O-pins-All-pins-can-be-programmed-as.png)