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.  

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

SIMPLE LINE FOLLOWER BOT

WHAT YOU NEED?

1) IR LED

2) IR SENSOR

3) NPN TRANSISTOR(BC 547)

4) 100 OHM RESISTOR

CIRCUIT

                SO HERE WE CAN SEE THAT IR LED AND IR SENSOR IS USED FOR LIN SENSING. 

IN WHICH IR RAYS WERE EMITTED FROM IR LED AND FALLS ON THE SURFACE AND IF IT IS WHITE THAN IT REFLECTED AND 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 12V DROP SHOULD BE ACROSS MOTOR AND MOTOR GET STARTED.  

ADVANTAGE

1) IT IS NOT HAVING ANY INFLUENCE OF LIGHT ON IT.

NOTE

                      

                         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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Posted in AUTONOMOUS, BLACK, BLACK LINE FOLLOWER, BOT, LINE, LINE FOLLOWER, ROBOT

SIMPLEST MOTOR DRIVER CIRCUIT

AIM: MOTOR DRIVER FOR WIRELESS CIRCUIT.

WHAT YOU NEED?

1) SPDT RELAY (4)

2) NPN TRANSISTOR (BC 547) (4)

DESCRIPTION:

                 IN ABOVE CIRCUIT MOTOR DRIVER USING FOUR RELAY AND NPN TRANSISTOR   IS SHAWN.  IN WHICH WE CAN SEE THAT WHEN ONE RELAY IS ENERGIZED MOTOR IS REVOLVING IN ONE DIRECTION SAY CLOCKWISE THAN FOR OTHER RELAY SAME MOTOR REVOLVING IN ANTICLOCKWISE DIRECTION.


                             YOU CAN SEE SAME CIRCUIT IN FOLLOWING VIDEO.

ADVANTAGES:

                  NO CURRENT LIMIT OVER HERE BECAUSE LOAD CURRENT IS NOT FLOWING THROUGH ANY ELECTRONIC DEVICE.

                  IF ANY ONE NEED SAME CIRCUIT OR ANY QUERY THAN CONTACT ME ON MY EMAIL ID.

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Posted in MOTOR DRIVER, NPN, RELAY, SIMPLE WIRELESS CIRCUIT, TRANSISTOR