How to Build a Day-Night Sensor Circuit
How to Build a Day-Night Sensor Circuit A day-night sensor circuit is a useful device that automatically detects changes in light levels and performs specific actions, such as turning lights on at night or off during the day. This type of circuit is commonly used in streetlights, garden lights, and other automatic lighting systems. Here, we will guide you through the steps to build a simple and effective day-night sensor circuit. What Is a Day-Night Sensor Circuit? A day-night sensor circuit uses a light-sensitive component, such as an LDR (Light Dependent Resistor), to detect ambient light levels. Based on the light intensity, it triggers an action—typically switching a light or device on or off. Components Needed LDR (Light Dependent Resistor) : Detects light levels. Resistors : To adjust sensitivity. Transistor (e.g., BC547) : Acts as a switch. Relay Module : Controls high-power devices. Diode (e.g., 1N4007) : Protects the circuit. LED or Bulb : Indicates operation. Power Supp...