The inside of the pantry doorway is trimmed with an inexpensive 12V LED strip light, like this one: https://www.amazon.com/Indoor-Warm-White-Strip-Light/dp/B0BBD6B7DP ...

const int LIGHT_DWELL_TIME = 2; // 2-second timer for rapid testing. A more useful time for a sensor light might be 30 seconds. // Variables used to check and control light state int dwellTime; // ...

Abstract: This study describes the optimization of solar cell electrical power with variations in slope angles using timer-based panel drive (DS3231 RTC) and light sensor (LDR). There are three solar ...

This Circuit can compare the Light level in an area. It uses a PN Photodiode as the light sensor and IC CA3140 as voltage comparator. The circuit is ideal as the front end of burglar alarm circuits.

An overwhelming majority of handheld devices these days have ambient light sensors built into them. A large percentage of TVs and monitors do, too, and that proportion is growing. The sensors allow ...