Remote Control Transmitter: (refer to the schematics and block diagram on as needed) When the levers in the Remote Control Unit are pushed electrical contacts are made connecting the 9V battery power to the transmitter and indicating which commands the user wants sent to the car. Forwards/Backwards and Left/Right commands are controlled by different levers and use different sets of electrical contacts that are used to encode a sequence of electrical pulses; the number of pulses depends on which command is being sent. On some models Left/Right commands are only sent if Forwards/Backwards commands are also being sent, since there is too much friction to.
