HC-06 connection loss during operation

Projects General Guidance
1

Hi everyone,

I want to make a bluetooth conrolled car. I designed a mobile app using MIT app inventor and I control my car with my mobile phone. There are 2 DC motors in my car that I have used, one of them controls the forward and backward movement while the other provides the right and left rotation movement. After connecting to the bluetooth module with the mobile application, I can only control the motor that provides the forward and backward movement, but when I send a command to turn right and left at the same time, the connection between the phone and the bluetooh module (HC-06) is disconnected and the vehicle is stuck in motion (In other words, when both engines are triggered at the same time, the connection with the bluetooth module is lost). When I turn off the switch of the vehicle, the vehicle stops. I run the system with 3 9V batteries. What could be the reason for this? Thanks.

2

Are the 9V batteries the kind used in smoke alarms? If yes, those batteries have very low current capability. If you draw very much current from them (like when running motors) the voltage will drop off. Get a battery that can supply the required current, like a 6 AA cell pack (9V).

Smoke alarm batteries are nearly worthless for Arduino projects.

3

Yes they are. I will try the cell pack you recommended. Thank you for your response.

4

What is the stall current and rated voltage of the motors?

What else does the battery need to power? At what voltages and currents?

6 AA cell pack, though better than 9V batteries, may not be the optimal power source.

5

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