Components used in RF robotic car1.Micro controller P89V51RD22.RF module transmitter3.RF module receiver4.Switch5.LED6.7.
Why micro controller is used?Micro controller contains micro processor,memory (RAM & ROM),I/O interfacing circuitsand a peripheral devices such as A/Dconverter,serial I/O,timer etc.It has many bit handling instructions.Less access times for built in memory and I/Odevices.Micro controller based system requires lesshardware reduction PCB size and increasingreliability.
Power supply unitInitially power supply are design to converthigh voltage ac mains ac to suitable low volt-age supply for electronics circuits and otherdevices. A power supply can by broken downin a series of blocks, each of which perform aparticular function. A DC power supply whichmaintain the output voltage constant irrespec-tive to the ac main fluctuation or load varia-tions is known as “Regulated DC Power Sup-ply”.
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Working of RF based robotic carThe RF module, as the name suggest,operates at the radio frequency. Thecorresponding frequency ranges between30kHz to 300kHz. This RF module comprisesof an RF transmitter and RF receiver.The transmitter/receiver (Tx/Rx) pairsoperates at a frequency of 434 MHz.The RF module has been used in conjunctionwith a set of four channel encoder / decoderICs.
Working:-The encoder converts the parallel input(fromthe remote switches) into the serial set of sig-nals.These signal are serially transmit through RFto the reception point.The decoder is used after the receiver to de-code the serial format and retrieve the originalsignal as output.