Project idea: A 2WD robotic vehicle uses a 433 MHz RF remote to send motion commands to an 8051 controller, while a metal detector module scans the path and raises a buzzer alert on detecting metal objects similar to land-mine simulations.
 
Project description: An RF transmitter with HT12E encodes button presses and sends them via a 433 MHz Tx to the robot, where an RF Rx with HT12D decodes the data for the 8051, which then drives the motors through an L293D driver on a 2WD chassis. A compact metal detector kit mounted at the front detects metal and triggers sound/light indication while the 8051 logic also actuates a buzzer alert for the operator.
 
Total list of components (names only):
8051 development board (AT89S52)
RF 433 MHz Tx/Rx pair
HT12E encoder IC
HT12D decoder IC
2WD robotic chassis with motors and wheels
L293D motor driver IC
Metal detector sensor/coil module or kit
Breadboard
Single-side FR4 PCB
Resistor assortment kit
Capacitor assortment kit
Transistor assortment kit
LEDs pack
Cables and connectors (e.g., PCT terminal)
Push buttons
Switch
IC sockets
Diodes
12V 1A adapter
12V 1.3Ah SMF battery
 
Features:
4-direction RF remote driving via 433 MHz link with typical open-space range up to about 100 m depending on antenna and environment.
Metal detection with audible alert using a DC 3–5 V DIY module that provides sound/light signaling on detection.
8051-based control with onboard programmer and 11.0592 MHz clock support for reliable serial and timing operations.
L293D H-bridge motor drive compatible with dual DC motors for robust bidirectional motion control.
 
Applications:
Educational demo of mine-like metal object detection and RF teleoperation for robotics curricula and safety concept prototyping.
Security sweep training, underground metallic object location exercises, and RF control experimentation projects.
 
 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: Approx assembled footprint 20 x 15 x 10 cm based on typical 2WD chassis form factor with mounted controller and sensor modules.
 
Shipping dimensions in cm: Approx 25 x 20 x 12 cm considering chassis, electronics, packaging cushioning, and power accessories in one kit box.
 
Weight: Approx 1.1 kg assembled; includes a 12V 1.3Ah battery of about 0.57 kg plus chassis and electronics mass.
 
Estimate project weight: 2 kg depending on wiring, fasteners, and packaging of modules.
 
Notes: All the products are made by LearnElectronics India and not for re-sale.