Smart Video Doorbell
Inside view of the doorbell
CAD design
Electronic components
Overview
A modern take on the traditional doorbell, this project transforms a standard 24V AC doorbell system into a smart video doorbell using ESP32-CAM modules and capacitive touch sensing.
The system integrates with ESP32 Home for mobile notifications and video streaming, making it easy to see who's at your door from anywhere in the house or even remotely.
Technical Details
Power System
The system cleverly utilizes the existing 24V AC doorbell circuit, converting it to power the ESP32 through:
- Full bridge rectifier for AC to DC conversion
- Step-down converter for ESP32 compatible voltage
Touch Detection
Instead of a traditional button, the doorbell uses capacitive touch sensing:
- Metal plate acts as a touch sensor
- ESP32 pin measures changes in electrical capacitance
- No moving parts means better reliability and weather resistance
Wireless Communication
The system uses WiFi for communication between components:
- Main ESP32-CAM unit detects touches and captures video
- Secondary ESP32 receives signals and controls the chime
- Integration with ESP32 Home for mobile notifications
- Easy expansion - additional chimes can be added anywhere with WiFi coverage
Future Improvements
Planned Features
- Motion detection for proactive notifications
- Integration with home automation systems
- Enhanced video storage and playback capabilities
- Additional ESP32 chimes for expanded coverage