Here you can see the circuit of the controller and the robot's circuit. Build these two with the help of your soldering iron.
On the transmitter, so on the joystick's circuit the Arduino Mini Pro measures the incoming signals from the joystick and the potentiometer than transmits these to the Bluetooth module or RF module in bytes. The measurement happens at analog pin A1, A0 and A2. The 5v step up module ensures the voltage for the micro-controller and the vharger circuit charges up the battery safely. The serial communication module is connected to pin D3 and I used a 1k and a 2k resistor to decrease the voltage to 3.3 volts.
On the receiver, I mean the robot's circuit the Arduino UNO gets the bytes from the RF or Bluetooth module and the controls the motors via the motor shield or turns on/off the lights. The camera is powered up by the 3.3 volt regulated pin of the Arduino. The serial comm. module is connected to pin A0.