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Constructing a RadioController Car - Help!

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I am a newbie to the field of electronics. I am 13 years old and I am greatly interested in knowing the deep levels of gadgets. I need help in constructing a RC car which can move forward , back , right and left.

I will be happy if anyone tells me the basics and the circuit diagram of this thing , and the purpose of each component in the circuit. I opened a similar RC car working at 49Mhz and there was a small PCB inside it which had a RX-2 microcontroller and the Remote control transmitter had a TX-2 Microcontroller,,and there were several resistors and capacitors.

I am a complete zero in electronics. I would be happy if someone helps me to understand the whereabouts in such a PCB and lifting myself building a successful electronic circuit. At present I need to know what happens in that PCB of the RC car . Please explain me step be step with a circuit diagram and the functions, works , role of each component in a PCB of a RC car.

Here are some foolish photos taken by me of the receiver and the transmitter. I know that you can understand anything from these pics. I just want to show you.



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