REMOTE CONTROL CIRCUITS

  
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SO HERE YOU CAN SEE THAT USING ENCODER 4-BIT DATA ISGENERATED AND THIS DATA WILL MODULATED USING RFMODULATE AND TRANSMITTED. ANOTHER SIDE RECEIVER RECEIVES SIGNAL AND DEMODULATE THAN DECODER DECODES THE SIGNAL AND 4-BIT DATA ISAVAILABLE. HERE IS THE PIN CONFIGURATION OF HT12E AND HT12D IS GIVEN IN WHICH 8-BIT ADDRESS PINS ARE THERE
REMOTE CONTROL CIRCUITS - schematic

USING WHICH WE CANGENERATE 256 VERITY OF ADDRESS. IF THIS ADDRESS WILL MATCH ON BOTH THE SIDE THAN AND ONLY THAN THE DATA IS TRANSMITTED. ADDRESS WILL BEGENERATEDUSING DIPSWITCHES. INSTEAD OF GROUNDING ALL THE ADDRESS PING YOU MAYCONNECT IT WHIT DIP SWITCHES AND THAN GROUND IT. LAST 4-PINS IN RECEIVER CIRCUIT ARE DATA PINS. BY DEFAULT THIS PINS ARE HAVING DIGITAL HIGH (5V) O/P WHEN TRANSMITTER SIDECORRESPONDING PIN WILL BE GROUNDED USING SWITCH SAME PIN AT RECEIVER SIDE GIVES DIGITAL LOW (0V). SO USING THIS CIRCUIT YOU CAN MAKE RC CAR OR RC HOME APPLIANCE CONTROLLER ETC. IN WHICH IR RAYS WEREEMITTEDFROM IR LED AND FALLS ON THE SURFACE AND IF IT IS WHITE THAN ITREFLECTEDAND IT SHOULD BE CAPTURE BY IR SENSOR AND GET FIRED. DUE TO WHICH 5V SINGLE IS APPLIED TO NPN TRANSISTOR AND IT GET FIRED AND DUE TO WHICH THE WHOLE 12VDROP SHOULD BE ACROSS MOTOR AND MOTOR GET STARTED. THIS BOT IS BLACK LINE FOLLOWER BUT IF YOU WANT TO MAKE A WHITE LINE FOLLOWER THAN WHAT YOU HAVE TO DO ONLY REPLACE NPN TRANSISTOR BY PNP TRANSISTOR.



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