MuTech RoboticsLearning Hub
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.

Car Blind-Spot Warning
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

  1. Each LiDAR looks back along its side of the car.
  2. The ESP32 reads both over two UARTs.
  3. A vehicle 0.5–6 m away in the zone lights that side's LED.
  4. 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)× 1Buy
  • 2× warning LEDs + 220 Ω resistors× 2Buy
  • Buck converter set to 5.0 V× 1Buy
Kit for this projectPrice on request
Get the kit

Wiring

Wiring diagram
PowerGroundSignal
#FromConnect to
1 PowerCar 12VBuck IN
2 PowerBuck OUT 5.0 V5V / GND rails
3 SignalLeft LiDAR TXESP32 D27
4 SignalLeft LiDAR RXESP32 D14
5 SignalRight LiDAR TXESP32 D33
6 SignalRight LiDAR RXESP32 D32
7 PowerLiDAR 5V / GND5V / GND rails
8 SignalLeft LEDESP32 D18 via 220 Ω
9 SignalRight LEDESP32 D22 via 220 Ω

3D print files

This project has no 3D-printed parts.

Code

The tested Arduino / ESP32 code for this project will be posted here, ready to copy.