Hi,
I just need to know that would HC-05 can work if it is receiving 3.24V after dividing the voltage.
Thanks,
Sofeem Nasim
receiving 3.24V after dividing the voltage.
Does that mean that you are using a resistor voltage divider to drop 5V to supply the HC-05?
Yes.
Well, that will not work.
From this Sparkfun page:
Application Dont’s
As tempting as it may be to use a voltage divider to step down, say, a 12V power supply to 5V, voltage dividers should not be used to supply power to a load.
Any current that the load requires is also going to have to run through R1. The current and voltage across R1 produce power, which is dissipated in the form of heat. If that power exceeds the rating of the resistor (usually between ⅛W and 1W), the heat begins to become a major problem, potentially melting the poor resistor.
That doesn’t even mention how inefficient a voltage-divider-power-supply would be. Basically, don’t use a voltage divider as a voltage supply for anything that requires even a modest amount of power. If you need to drop down a voltage to use it as a power supply, look into voltage regulators or switching supplies.
You can use a linear voltage regulator like the LM1117 3.3 or there are many switch mode converters available to drop 5V to 3.3V.
Most HC-05 boards are mounted on top of a slightly bigger board that already has the required 3.3volt regulator, indicator LED, etc. If the board has 4-6 pins on one side, and 3.6-6volt is written on the back, then you can (must) connect the power pin of the module directly to 5volt. The RX pin however must be stepped down with a divider (1k:2k) if you connect it to a 5volt Arduino.
Leo..