Quantity   Component name
1 × DTMF Decoder Module
1 × 3.5mm Audio Jack for connecting mobile to DTMF module
1 × Arduino Uno
1 × Servo motor Torque 7kg/cm
1 × Android Phone I used Samsung Galaxy Ace Duos, with android Gingerbread running on it
2 × Geared DC motors with Wheels
1 × L298 motor driver module
1 × Laptop can be desktop or any android device supporting multi windows
1 × Android apps AirDroid, DTMF Tone Generator, VNC server
1 × Applications on laptop VNC client and Browser