Project idea
Detect unauthorized ignition/tamper events, auto-SMS the owner via a SIM800L GSM module, and on a reply SMS command cut ignition through a relay interface driven by an 8051 microcontroller.
An optional GPS module can append live latitude/longitude in SMS, enabling map lookup of the vehicle’s position.
Project description
An AT89S52-based controller monitors theft-status inputs and triggers the SIM800L to send an SMS; on receiving a specific reply, it actuates a relay to disable ignition safely.
Core building blocks include the 8051 MCU, GSM module for SMS, a 5 V relay module for engine lock control, regulated power, and basic passives/IO on breadboard/PCB for integration.
Total list of components (names only)
8051 Microcontroller (AT89S52)
GSM Module (SIM800L)
2-Channel 5V Relay Module
12V 1A Adapter
PCB (FR4 single-side)
Breadboard (MB102/GL-12 class)
Resistors
Capacitors
Transistors
Diodes
LED
Cables and Connectors/Jumper Wires
Push Buttons
Switch
IC
IC Sockets
Features
SMS alert on tamper/ignition event and reply-SMS engine lock using SIM800L AT commands.
Relay-driven ignition cut with opto-isolated 5 V dual-channel relay interface for robust isolation.
Stable 8051 control with UART for GSM interfacing and deterministic I/O handling.
Optional GPS add-on to include coordinates in SMS for quick location lookup.
Applications
Anti-theft immobilization for two-wheelers and cars using SMS control.
Fleet immobilization and basic remote lockout for small assets.
Educational embedded systems project featuring 8051-GSM integration.
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 (cm)
Assembled build within a standard full-size breadboard footprint: approximately 17 × 6 × 3 cm (controller + GSM + relay on MB102-class board).
Shipping dimensions (cm)
Compact kit-box class packaging: approximately 22 × 15 × 5 cm.(L x W x H)
Weight
Breadboard reference weight 0.0611 kg provides a baseline for assembled prototype.
Estimate project weight
Approximately 1 kg including board, GSM, relay, passives, and wiring, aligned with small component kit packaging weights.
Notes: All the products are made by LearnElectronics India and not for re-sale.
GSM Vehicle Theft Alert with Engine Lock
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Order Processing Time:
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Delivery Timeframe:
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Order Cancellations:
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Technical Support:
- We provide basic technical support for the first 30 days after delivery to help you set up and operate your project.
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Disclaimer:
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