a presentations on voice control of electrical appliances

a presentations on voice control of electrical appliances , and project made by elite engineering club .

1. Project name – Voice control of Electrical Appliances. Group Name – Elite Engineering Club . Name – Piyush Pathak , Abhishek Pathak , Harsh Dwivedi , Atul Singh . Branch – Electrical Engineering (3rd year) PRASAD POLYTECHNIC JAUNPUR

2. Introduction of Project Voice control technology integrates with various smart devices and appliances in homes , such as lights , thermostats, locks, cameras, and entertainment systems. These devices are equipped with connectivity features like Wi-Fi, Bluetooth , or Zigbee , enabling them to communicate with voice assistants.

3. Voice Assistants Popular voice assistants like Amazon Alexa , Google Assistant, and Apple's Siri serve as the interface for controlling electrical appliances using voice commands. Users can activate these assistants by saying a wake word (e.g., " Alexa ," "Hey Google") followed by their command.

4. Hands-Free Operation One of the key benefits of voice control is its hands-free operation. Users can control appliances and devices without the need to physically interact with them, which is especially convenient when performing tasks or when hands are occupied.

5. Automation and Scenes Voice control enables the creation of automation routines and scenes, where multiple devices can be grouped together and controlled simultaneously with a single voice command. For example, saying "Good night" could trigger a sequence that turns off all lights, locks the doors, and adjusts the thermostat to a comfortable sleeping temperature.

6. Accessibility Voice control technology enhances accessibility for individuals with disabilities or mobility issues, allowing them to independently manage their environment and perform everyday tasks with greater ease.

7. Compatibility and Ecosystems Compatibility between different smart devices and voice assistants is crucial for seamless integration and user experience. Manufacturers often develop partnerships and alliances to ensure interoperability between products and create cohesive smart home ecosystems.

8. Future Developments The field of voice control of electrical appliances continues to evolve with advancements in artificial intelligence, natural language processing, and machine learning . Future developments may include more sophisticated voice recognition capabilities, enhanced contextual understanding, and seamless integration with emerging technologies like augmented reality and Internet of Things ( IoT ) devices.

9. Introduction of circuits 1. Nodemcu Esp 8266 Microcontroller. NodeMCU is open source low cost IOT platform. Since nodeMCU is open open source platform their hardware design is open for edit ,modify and build. It includes firmware which runs on the ESP8266 Wi-Fi SoC from Espressif Systems, and hardware which is based on the ESP-12 module. The firmware uses the Lua scripting language.

10. Figure of esp 8266 microcontroller

11. Hardware overview of Esp 8266 Node MCU has 4MB of storage and 128 Kb of Memory. It has several GPIO (General Purpose Input Output) pins for device connectivity. It has only one Analogue pin for Analogue input.

12. 2. 5 Volt , 4 – Channel Relay module The four-channel relay module contains four 5V relays and the associated switching and isolating components, which makes interfacing with a microcontroller or sensor easy with minimum components and connections. The contacts on each relay are specified for 250VAC and 30VDC and 10A in each case, as marked on the body of the relays.

13. Hardware Overview of 5 v, 4 – Channel relay module & Four-Channel Relay Module Specifications 5V relay, terminal blocks, male headers, transistors, optocouplers , diodes, and LEDs. :- Supply voltage – 3.75V to 6V :- Trigger current – 5mA :- Current when the relay is active - ~70mA (single), ~300mA (all four) :- Relay maximum contact voltage – 250VAC, 30VDC :- Relay maximum current – 10A

14. Circuit diagram

15. ABOUT CONNECTION OF CIRCUIT Microcontroller ESP8266 : The ESP8266 microcontroller typically includes GPIO pins for general input/output, power pins (VCC, GND), UART pins for serial communication, SPI pins for high-speed communication, I2C pins for interfacing with sensors, analog input pins, reset pin, flash memory pins, and antenna connection for Wi-Fi. To connect a 4-channel relay module (5V) to a NodeMCU , you would follow these steps. a. Identify Pins*: - A 4-channel relay module typically has input pins labeled "IN1", "IN2", "IN3", and "IN4" for controlling each relay channel, along with VCC and GND pins for power.

16. b. Choose GPIO Pins*: - Decide which GPIO pins on the NodeMCU you want to use to control each relay channel. You'll need four GPIO pins, one for each relay . c. Connect Signal Pins*: - Connect the "IN" pins of the relay module to the chosen GPIO pins on the NodeMCU . Each GPIO pin will control a separate relay channel . d. connect switch pins*: - Here b/w NodeMcu and relay switches are assembled 4 switches are namely s1,s2,s3,s4 are connected with pins s1 with SD3,s2 with D3 s3 with D7, s4 with RX and on outputside GND pins of relay are short with switches .

17. e. Connect Ground Pin Connect one of the GND pins of the relay module to any of the ground (GND) pins on the NodeMCU . This provides a common ground reference for the circuit. f. Connect Power Connect the VCC pin of the relay module to a 5V power source. This can be from the NodeMCU's 5V pin or an external power supply, depending on the module's requirements.