Kids OK with adultESP32Level 1/3
Auto Staircase Lights
Step onto the stairs and a 12V LED strip lights up; it switches off once the stairs are empty.
Kids OK, with an adult
DIY project. Children must build this only with an adult (16+ years) beside them at all times. Not suitable for children under 8 years.
Strictly follow the description given with this video.
Video
The video link will be added here soon.
How it works
- The mmWave radar senses a person on the stairs.
- The ESP32 sets D25 HIGH.
- The HIGH-trigger relay connects the 12V adapter to the LED strip.
- No one present for a while: the strip switches off.
Parts you need
- mmWave radar sensor (24 GHz presence)× 1Buy
- ESP32 development board (30-pin)× 1Buy
- 1-channel 5V relay module (HIGH-level trigger)× 1Buy
- 12V LED strip× 1Buy
- 12V adapter× 1Buy
Kit for this projectPrice on request
Get the kitWiring
PowerGroundSignal
| # | From | Connect to |
|---|---|---|
| 1 Power | Radar V | ESP32 3V3 |
| 2 Ground | Radar G | ESP32 GND |
| 3 Signal | Radar IO | ESP32 D23 |
| 4 Signal | Relay IN | ESP32 D25 |
| 5 Power | Relay VCC | ESP32 VIN |
| 6 Ground | Relay GND | ESP32 GND |
| 7 Power | 12V adapter + | Relay COM |
| 8 Signal | Relay NO | LED strip + |
| 9 Ground | LED strip − | 12V adapter − |
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.