4-BIT TRANSMITTER AND RECEIVER CIRCUIT USING ENCODER AND DECODER

WHAT YOU NEED?

1)ENCODER(HT12E) 

2)DECODER(HT12D)

3)8-BIT DIP SWITCHES

4)RF MODULES (A-434 OR A-315)

5)VOLTAGE REGULATOR (7805)  

BLOCK DIAGRAM OF TRANSMITTER AND RECEIVER

                           SO HERE YOU CAN SEE THAT USING ENCODER 4-BIT DATA IS GENERATED AND THIS DATA WILL MODULATED USING RF MODULATE AND TRANSMITTED. ANOTHER SIDE RECEIVER RECEIVES SIGNAL AND DEMODULATE THAN DECODER DECODES THE SIGNAL AND 4-BIT DATA IS AVAILABLE.  

                                HERE IS THE  PIN CONFIGURATION OF HT12E AND HT12D IS GIVEN IN WHICH 8-BIT ADDRESS PINS ARE THERE USING WHICH WE CAN GENERATE 256 VERITY OF ADDRESS. IF THIS ADDRESS WILL MATCH ON BOTH THE SIDE THAN AND ONLY THAN THE DATA IS TRANSMITTED. ADDRESS WILL BE GENERATED USING DIP SWITCHES. IN STEAD OF GROUNDING ALL THE ADDRESS PING YOU MAY CONNECT IT WHIT DIP SWITCHES AND THAN GROUND IT.    

TRANSMITTER CIRCUIT

RECEIVER CIRCUIT

                               LAST 4-PINS IN RECEIVER CIRCUIT ARE DATA PINS. BY DEFAULT THIS PINS ARE HAVING DIGITAL HIGH (5V) O/P WHEN TRANSMITTER SIDE CORRESPONDING 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.

ADVANTAGES

AS WE ARE USING DIP SWITCHES FOR GENERATING ADDRESS NO PROBLEM OF INTERFERENCE.  

FOR MAKING RC CAR USING THIS CIRCUIT YOU HAVE TO USE A MOTOR DRIVER CIRCUIT FOR WITCH YOU CAN REFER MY ANOTHER POST ON MOTOR DRIVER.  

Posted in RC CAR, RC CIRCUIT, REMOTE, REMOTE CONTROL