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Download easily explain to presentation its is helpful to explain this presentation and some information of power subject and more Slides Power Electronics in PDF only on Docsity! a INDUS UNIVERSITY eS —_ WIRELESS DOORBELL Prepared By: al \ Zainab Ather, OQ / • TABLE OF CONTENTS • INTRODUCTION • COMPONENTS • FOR TRANSMITTER • FOR RECEIVER • CIRCUIT DIAGRAM • WIRELESS DOORBELL TRANSMITTER CIRCUIT DIAGRAM • WIRELESS DOORBELL RECEIVER CIRCUIT DIAGRAM • COMPONENT DESCRIPTION • CIRCUIT DESIGN • DESIGN OF TRANSMITTER CIRCUIT • DESIGN OF RECEIVER CIRCUIT • WORKING OF THE PROJECT • CODE • ADVANTAGES • LIMITATION • APPLICATIONS  • FOR RECEIVER • ARDUINO UNO • 434 MHZ RF RECEIVER MODULE • HT – 12D DECODER IC • 33 KΩ RESISTOR • SMALL BUZZER • POWER SUPPLY • CONNECTING WIRES • PROTOTYPING BOARD (BREADBOARD) *~ CIRCUIT DIAGRAM —/ * WIRELESS DOORBELL TRANSMITTER CIRCUIT DIAGRAM wae 434MHz RF Transmitter Module Antenna OOO |) S}@}yjs — HT-12E — ¢ WIREL SS.DOORBELL RECEIVER CIRCUIT DIAGRAM WS Y 434MHz RF Receiver Module Antenna BUZZER ion =~ ARDUINO UNO R3 • CIRCUIT DESIGN • DESIGN OF TRANSMITTER CIRCUIT • THE TRANSMITTER CONSISTS OF A 434 MHZ RF TRANSMITTER MODULE, HT – 12E ENCODER IC, 750 KΩ RESISTOR AND A PUSH BUTTON. THE DESIGN OF THE TRANSMITTER CIRCUIT IS VERY SIMPLE. PINS 18 AND 9 ARE CONNECTED TO SUPPLY AND GROUND TERMINALS RESPECTIVELY. • THE DATA OUT PIN (PIN 17) OF HT – 12E IS CONNECTED TO DATA PIN OF THE RF TRANSMITTER MODULE. A 750 KΩ IS CONNECTED BETWEEN THE OSCILLATOR PINS (PINS 15 AND 16) OF THE HT – 12E. THE TRANSMISSION ENABLE PIN (PIN 14) IS CONNECTED TO GROUND. A PUSH BUTTON IS CONNECTED BETWEEN AD8 (PIN 10) AND GROUND. OTHER CONNECTIONS ARE SHOWN IN THE CIRCUIT DIAGRAM. • DESIGN OF RECEIVER CIRCUIT • THE RECEIVER PART OF THE PROJECT CONSISTS OF 434 MHZ RF RECEIVER MODULE, HT – 12D DECODER IC, 33 KΩ RESISTOR, ARDUINO UNO AND A SMALL BUZZER. • PINS 18 AND 9 I.E. VDD AND VSS PINS ARE CONNECTED TO SUPPLY AND GROUND TERMINALS RESPECTIVELY. THE DATA IN PIN (PIN 14) OF THE DECODER IC IS CONNECTED TO THE DATA PIN OF THE RF RECEIVER MODULE. A 33 KΩ RESISTOR IS CONNECTED BETWEEN THE OSCILLATOR PINS (PINS 15 AND 16) OF THE DECODER IC. • THE D8 PIN (PIN 10) IS CONNECTED TO PIN 2 (OR ANY DIGITAL I/O PIN) OF ARDUINO UNO. A SMALL BUZZER IS CONNECTED BETWEEN PIN 11 OF ARDUINO AND GROUND. • WORKING OF THE PROJECT • THE AIM OF THIS PROJECT IS TO DESIGN A SIMPLE WIRELESS DOORBELL. THE WORKING OF THE PROJECT IS EXPLAINED HERE. FOR EXPLAINING THE WORKING OF THE PROJECT, ALL THE CONNECTIONS ARE MADE AS PER THE CIRCUIT DIAGRAM. • NOTE: MAKE SURE THAT THE TRANSMITTER PART OF THE PROJECT IS SWITCHED ON BEFORE THE RECEIVER PART. THIS IS TO ENSURE THAT THE RF TRANSMITTER AND RECEIVER MODULES ARE PROPERLY PAIRED. • IN ORDER TO RING THE BELL (OR BUZZER IN THIS CASE), WE NEED TO PUSH THE BUTTON ON THE TRANSMITTER SIDE OF THE CIRCUIT. WHEN THE BUTTON IS PUSHED ON THE TRANSMITTER SIDE, A LOGIC ‘0’ WILL BE DETECTED BY THE ENCODER IC. THE ENCODER IC WILL TRANSMIT THIS DATA SERIALLY THROUGH THE RF TRANSMITTER MODULE. • THE TRANSMITTED DATA WILL BE RECEIVED BY THE RF RECEIVER MODULE AND IS GIVEN TO THE DECODER IC. THE DECODER IC, THEN DECODES THE SERIAL DATA TO PARALLEL DATA AND TRANSMITS THE LOGIC ‘0’ TO ARDUINO. • IN THE ARDUINO UNO’S, IT IS PROGRAMMED SUCH THAT, WHENEVER A LOGIC ‘0’ IS DETECTED BY THE ARDUINO, THE BUZZER IS TURNED ON. HENCE, WHENEVER THE BUTTON IS PRESSED, THE BUZZER IS TURNED ON WIRELESSLY. int buz=11; int sen=2;   void setup() { pinMode(buz,OUTPUT); pinMode(sen,INPUT);   digitalWrite(buz,LOW); digitalWrite(sen,HIGH); }   void loop() { while(digitalRead(sen)==HIGH); digitalWrite(buz,HIGH); while(digitalRead(sen)==LOW); digitalWrite(buz,LOW); } Code