Adults onlyESP32Level 3/3
Car Blind-Spot Warning
A LiDAR on each mirror watches the blind spot and lights a warning LED when a bike or car is alongside.
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Adults only
Involves vehicle wiring.
Not for children. Build at your own risk.
A driving aid only: always check your mirrors and shoulder.
Strictly follow the description given with this video.
Video
The video link will be added here soon.
How it works
- Each LiDAR looks back along its side of the car.
- The ESP32 reads both over two UARTs.
- A vehicle 0.5–6 m away in the zone lights that side's LED.
- The car's 12V goes through a buck converter set to 5.0 V.
Parts you need
2× LiDAR distance sensors (UART)× 2Buy
ESP32 development board (30-pin)₹518× 1Buy
2× warning LEDs + 220 Ω resistors× 2Buy
Buck converter set to 5.0 V₹69× 1Buy
Kit for this projectPrice on request
Get the kitWiring
PowerGroundSignal
| # | From | Connect to |
|---|---|---|
| 1 Power | Car 12V | Buck IN |
| 2 Power | Buck OUT 5.0 V | 5V / GND rails |
| 3 Signal | Left LiDAR TX | ESP32 D27 |
| 4 Signal | Left LiDAR RX | ESP32 D14 |
| 5 Signal | Right LiDAR TX | ESP32 D33 |
| 6 Signal | Right LiDAR RX | ESP32 D32 |
| 7 Power | LiDAR 5V / GND | 5V / GND rails |
| 8 Signal | Left LED | ESP32 D18 via 220 Ω |
| 9 Signal | Right LED | ESP32 D22 via 220 Ω |
3D print files
This project has no 3D-printed parts.