How does a remote control for a toy car work?

The principle of remote control toy car: general is to use 4 channel wireless remote control codec chip. For example, encoding chip PT2262, decoding chip PT2272.

PT2272 to decoding chip, chip PT2262 encoding signal coding by: address code, data, synchronization code to form a complete code word, after decoding chip PT2272 receives the signal, its address code after two comparison, after checking VT feet to output high level, at the same time the corresponding data foot also output high level, if the sender has been holding the keys, encoding chip will continuously launch. When there is no buttons to press the transmitter, PT2262 is not connected to the power supply, its 17 feet is low level, so the high frequency of 315 MHZ transmission circuit doesn't work, when there is a button press, PT2262 electric work, the 17 feet by the modulation of the serial data output signal, when 17 feet for high level during the high frequency of 315 MHZ launch circuit vibration and continuous high frequency signal, when 17 feet for low during the high frequency of 315 MHZ transmission circuit to stop oscillation, so high frequency transmission circuit completely closed in PT2262 17 feet output digital signal, Thus, the amplitude keying (ASK modulation) of the high-frequency circuit is equivalent to 100% amplitude modulation of the modulation system.

Remote control toy car, wireless remote control is how to achieve: first of all, on the remote control has a lot of triode, it can make the power supply into the pulse signal, and the working principle of the remote control of the television. Second, in remote control car has a piece to accept pulse sheen and symplectic piece is also composed of triode, receiver and transmitter of general remote control car is integrated.