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DTMF Spy Robot with Metal Detection
Project idea
A long-range teleoperated spy robot uses DTMF over a phone call to receive keypad commands for drive control while integrating an inductive metal detector for on-spot metal sensing and a night‑vision mini camera for live visuals on a PC client.
 
Project description
An AT89S52 microcontroller decodes MT8870 DTMF outputs to drive an L293D H‑bridge for forward, reverse, left, and right motion on a compact 2WD chassis, while a proximity metal sensor triggers a buzzer alert upon metal detection.
Power is supplied by a 12 V 1.3 Ah lead‑acid battery regulated to 5 V via a 7805, and a mini night‑vision Wi‑Fi camera streams video suitable for PC viewing, enabling day/night reconnaissance irrespective of user distance.
 
Total list of components
  • 8051 Microcontroller (AT89S52)
  • Robotic Chassis (2WD kit with motors and wheels)
  • Buzzer (5 V active)
  • DC Motor (included with 2WD kit)
  • Motor Driver IC (L293D)
  • Voltage Regulator IC (7805)
  • Resistors
  • Capacitors
  • Transistors
  • Cables and Connectors
  • Diodes
  • PCB and Breadboards
  • LED
  • Push Buttons
  • Switch
  • IC Sockets
  • Wireless Camera (mini, night vision)
  • Metal Detector Coil / Inductive Sensor (LJ12A3‑4‑Z/BX)
  • DTMF Decoder Module (MT8870)
 
Features
  • Unlimited‑range teleoperation via DTMF call routing to on‑board MT8870 for robust keypad command decoding.
  • Metal detection alert using 4 mm‑range inductive proximity sensor with buzzer indication for immediate feedback.
  • Night‑vision mini camera stream suitable for PC viewing to enable day and night surveillance on a compact 2WD platform.
 
Applications
  • Remote surveillance of restricted or hazardous areas with long‑distance control over standard telephony.
  • Metal object screening in under‑vehicle or floor‑level zones using an inductive proximity sensor.
  • Educational demonstration of DTMF decoding, H‑bridge motor control, and sensor‑actuator integration on 8051.
 
 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 Soldered - We are providing fully assembled, tested and ready-made project soldered on a PCB with all the other components, code & circuit diagram.
 
Dimensions in cm
  • Assembled robot approximately 20 (L) × 15 (W) × 12 (H) cm based on typical 2WD chassis footprint and component stack height.
 
Shipping dimensions in cm
  • Packed kit approximately 30 (L) × 22 (W) × 12 (H) cm allowing safe clearance for chassis, battery, and camera module.
 
Weight
  • Approximate build weight 1.4 kg driven primarily by the 12 V 1.3 Ah SLA battery plus chassis, electronics, and camera.
 
Estimate project weight
  • Estimated shipping weight 1.8 kg including protective packaging and accessories.
 
Notes: All the products are made by LearnElectronics India and not for re-sale.

DTMF Spy Robot with Metal Detection

PriceFrom ₹6,739.00
Quantity

    • Order Processing Time:

      • All project orders are processed within 2-3 business days after payment confirmation.
      • 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.

    • 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.

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      • 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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