Bluetooth Module which uses 3.3 V of Arduino

Hi,

I intend to use the below IR break beam sensor

https://cdn-learn.adafruit.com/assets/assets/000/021/675/original/sensors_Irbreak.jpg?1418245185

As you can see in the above picture, 5V power pin is already occupied by one of the wires of IR break beam sensor.

The bluetooth module that i currently have ( HC05 ) requires 5V input voltage. Since 5V pin is already occupied by the IR break beam sensor , i am left with option to use the 3.3 V pin of the Arduino.

What Bluetooth module do you recommend which requires input power of max 3.3 V and can be used along with Break Beam sensor ?

The bluetooth module that i currently have ( HC05 ) requires 5V input voltage. Since 5V pin is already occupied by the IR break beam sensor , i am left with option to use the 3.3 V pin of the Arduino.

Do you have a problem soldering wires together? The 5V on the Arduino can power multiple devices, as long as the devices do not collectively draw too much current.

PaulS: Do you have a problem soldering wires together? The 5V on the Arduino can power multiple devices, as long as the devices do not collectively draw too much current.

I would be using a USB(laptop in my case) to power the Arduino.

Although i could solder the 2 wires ( one from HC05 and one from IR break beam sensor) and hook them into 5V, i would prefer to use a dedicated bluetooth module....

i am left with option to use the 3.3 V pin of the Arduino.

No you are not. A dedicated 3.3v HC-06 module exists but most Arduinos have insufficient power available @ 3.3v to use it. All bare HC-0x boards are 3.3v, but the same obviously applies, and probably require you to come to terms with using a soldering iron anyway.

This all seems pretty silly, but maybe you could use VIN or the ICSP cluster for alternative power. Failing that, you could invest $1 in a breadboard, which is what most people do at a time like this.