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
![Can the same 9V supply used to power Arduino, also be used on the output side of a relay? - Project Guidance - Arduino Forum Can the same 9V supply used to power Arduino, also be used on the output side of a relay? - Project Guidance - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/1/a/b/1abc000f7e7f4f5717b7780f9a25c3b34d1ba162.png)
Can the same 9V supply used to power Arduino, also be used on the output side of a relay? - Project Guidance - Arduino Forum
![Different Ways to Power Arduino Board - How to Power Your Arduino Board with Different Power Options Different Ways to Power Arduino Board - How to Power Your Arduino Board with Different Power Options](https://circuitdigest.com/sites/default/files/inlineimages/u4/Arduino-Vin-Pin.jpg)