An LDR light sensor, also known as a photoresistor, is a passive electronic component that changes its resistance based on the intensity of light falling on it. Light sensors convert the received light energy into. Do you want to unlock the Power of Light with Light Sensors - An In-Depth Guide. From principles and types to advantages and applications, discover everything you need to know about light sensors. The module provides two outputs: a digital output (LOW/HIGH) and an analog output. There are different types of sensors such as light sensors, temperature sensor, humidity sensor, pressure sensor, fire sensor, ultrasonic sensors, IR sensor, touch sensor, and so on.