In this section, we will have an application to link our smart phone with the Bluetooth of the phone, it's called Amarino and you can get it from: http://www.amarino-toolkit.net/index.php/home.html. We will also see how to control a DC motor from an Android application, let's dive into it!
In the following diagram, we see the following circuit (L293D) is used to control the speed and the turning of the motor:
In the following figure, we have the final connections of the circuit to the Arduino board:
The final interface is shown in the following screenshot:
The final results are ...