@kowshik1729 thank you for replay

@salmanfaris click this pdf

@kowshik1729 ok

The above image shows the ckt with ultrasonic sensor and attiny 45 Ic ,Bd 140 transistor (for switching the 6v pump).
***The problem is when I give power from 5v regulator to all this as shown in fig, the circuit is not working ,(not enough power ).
What should I do.
Should I give separate power to motor
I am using 5.5v adaptor 500mAh.

*I have checked the circuit by connection separate 5 v from arduino ,to that attiny 45 ic and sensor,. Then it is working .

• Please help

@salmanfaris
No

@kowshik1729 ok

I want to make a device which measure the level or quantity of soil deposited under a tank containing water (sedimentation). Any one help please.

@kowshik1729 thank you

@kowshik1729 this link also include data sheet link

@kowshik1729 I just find that hc05 is not getting much ampere(current) from that battery.
That is the main problem .
Amps
What to do

@kowshik1729 I wish to use led in series because I want the all circuit so small .
To make a key finder device .
My hc05 didn't burn out it was working when I connected it to arduino 5v after that.

How to Power HC 05 using 2 -3.3 v lithium cell battery.
Hc05 is not working when I connect it with the 2-3.3v cell battery.
I have checked the total voltage .,=6.68v
But Hc 05 is not responding.
So I read the data sheet of hc05 ,in that it says that the operating voltage of hc05 is between 3.3v. To 6v .
I gived the voltage above 6v .
So I decided to connect a 2v led series to hc05 then the Hc 05 will get voltage near 4.3 or grater.
I didn't checked it practicaly .
If you know Any thing about that please help me.
HELP ME