Hi,
I intend to use the below IR break beam sensor
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.
