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Load Control System Using DTMF
Project Idea
The project is a remote load control system based on DTMF (Dual Tone Multi Frequency) technology. It enables controlling various electrical loads distributed over a large area using commands sent from a mobile phone keypad. The system decodes the DTMF tones into digital signals which the 8051 microcontroller processes to switch relays, thereby turning loads ON or OFF. It is ideal for managing industrial, domestic, or agricultural electrical systems remotely.
 
Project Description
The system uses a DTMF decoder interfaced with the audio output of a mobile phone to receive tone commands generated when a keypad button is pressed. The decoder converts these tone frequencies into their equivalent digital codes. These digital codes are input to an 8051 microcontroller programmed to identify specific phone commands and activate the corresponding relay through a relay driver IC. This actuates electrical loads by switching them ON or OFF as per the received commands, allowing efficient remote management and control of devices.
 
Total List of Components
  • 8051 Microcontroller
  • DTMF Decoder IC (MT8870)
  • Relay Driver IC
  • Inverter IC
  • Voltage Regulator IC (7805)
  • Resistors (various values)
  • Capacitors (various values)
  • Transistors (BC547)
  • Diodes
  • LEDs
  • Push Buttons
  • Switches
  • Transformer/Adapter
  • Crystal Oscillator (3.579545 MHz)
  • Cables and Connectors
  • IC Sockets
  • Lamps (for load indication)
  • PCB and Breadboards
 
Features
  • Remote control of electrical loads via mobile keypad
  • Uses DTMF tones for command transmission
  • Compact and reliable 8051 microcontroller-based design
  • Controls multiple loads distributed over large areas
  • Suitable for industrial, domestic, and agricultural applications
  • Real-time on/off switching of electrical devices
  • Simple and cost-effective solution
 
Applications
  • Industrial load management remotely
  • Agricultural pump and irrigation system control
  • Domestic home automation and appliance control
  • Remote switching of street lamps and outdoor lighting
  • Control of equipment spread over large geographical areas
 
Project Includes:
  • Fully assembled and tested circuit
  • Circuit diagram
  • Source code 
(For DIY KITs - only the components will be provided)
 
Project Types:
  • DIY KIT(Do IT YourSelf KIT) - We are providing only components in this kit for this project
  • DIY KIT with Code & Circuit Connections - Along with the components, you will get the Code and the Circuit Connections file to help you build the project easily.
  • Readymade Breadboard - We are providing fully assembled, tested and ready-made project using plug-n-play jumper wires and breadboard with all the other components, code & circuit diagram.
  • Readymade Soldered - We are providing fully assembled, tested and ready-made project soldered on a PCB with all the other components, code & circuit diagram.
 
Dimensions
Physical project dimensions typically depend on PCB size; estimated dimensions:
Length: 15 cm, Width: 10 cm, Height: 5 cm (approximate)
 
Shipping Dimensions
Considering packaging and protective casing for safe transport:
Length: 20 cm, Width: 15 cm, Height: 8 cm (approximate)
 
Weight
Estimated electronic components and PCB weight: ~400 grams
 
Estimate Project Weight Including Packaging
Approximate with box and packing material: 1kg
 
Notes: All the products are made by LearnElectronics India and not for re-sale.

Load Control System Using DTMF

PriceFrom ₹3,592.00
Quantity
    • Order Processing Time:
      • After processing, the development of your project will begin. We require a minimum of 10-15 days to complete and prepare your project for shipment. However, please note that the delivery time is an estimate and may vary depending on project complexity and component availability.
      • All project orders are processed within 2-3 business days after payment confirmation.

      • Delivery Timeframe:

        • While we strive to deliver your project within the specified timeframe, there is no guaranteed delivery date. The actual delivery time may be shorter or longer depending on various factors, including shipping delays, customs clearance, and unforeseen technical challenges.
        • We will keep you informed of your project's progress and provide updates on the estimated delivery time as needed.

      • Shipping and Delivery Charges:

        • Delivery charges are additional and are not included in the project price. The shipping cost will be calculated at checkout based on your location and the chosen shipping method.
        • Customers are responsible for any customs duties, taxes, or fees that may be applicable in their country.

      • Order Cancellations:

        • Due to the customized nature of our projects, orders can only be canceled within 24 hours of placement. After this period, the order is non-cancellable as work will have already begun.

      • Returns and Refunds:

        • As these are custom-built projects, we do not accept returns or offer refunds unless the project is defective or significantly not as described.
        • If there are any issues with your project upon delivery, please contact us within 7 days to resolve the matter.

      • Technical Support:

        • We provide basic technical support for the first 30 days after delivery to help you set up and operate your project.
        • Extended support and customization services are available at an additional cost.

      • Disclaimer:

        • We are not responsible for delays caused by external factors beyond our control, including but not limited to shipping carrier delays, natural disasters, or government restrictions.
        • By placing an order, you agree to the terms and conditions outlined in this policy.
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