A Green-Light smart switch is an electronic circuit that automates the lighting of a
room based on the level of ambient light. The switch is activated when the room is dark, turning on the
light, and deactivated when there is sufficient light, turning off the light. The switch is built using
commonly available electronic components such as an LDR (Light Dependent Resistor), a transistor, a
relay, a diode, and a resistor.
Features: The Green-Light smart switch is user-friendly and easy to operate. It is designed to save
energy by automatically turning off the light when there is enough light in the room, and turning it on
only when it’s dark. In addition to this, it also has the following features
1. High Accuracy: The circuit is designed to be highly accurate in detecting ambient light levels.
The LDR used in the circuit is sensitive to light and can detect even the slightest changes in
light intensity.
2. Cost-effective: The circuit is built using commonly available electronic components, which
makes it a cost-effective solution for automating the lighting of a room.
3. Low Power Consumption: The circuit consumes very little power, making it an energy-efficient
solution for automating the lighting of a room.
4. Automatic shut-off: The circuit turns off the lights automatically when there is sufficient
ambient light in the room resulting in saving the cost of electricity.
Functionality: The Green-Light smart switch works by using the LDR as a light sensor. When the
room is dark, the resistance of the LDR is high, which causes the transistor to turn on. This, in turn,
energizes the relay, which switches on the AC bulb. When there is enough light in the room, the
resistance of the LDR decreases, causing the transistor to turn off. This de-energizes the relay, which
turns off the AC bulb.
Conclusion: The Green-Light smart switch is a simple and effective solution to automate the
lighting of a room. The switch is easy to install, user-friendly, and customizable. It can help save energy
and reduce electricity bills by automatically turning off the light when it’s not needed. The switch can
be built using commonly available electronic components, making it accessible to everyone.