A photoresistor (also known as a light-dependent resistor, LDR, or photo-conductive cell) is a passive component that decreases in resistance as a result of increasing illuminance (light) on its sensitive surface, in other words, it exhibits photoconductivity. A photoresistor can be used in light-sensitive detector circuits and light-activated and dark-activated switching circuits acting as a ...
A light-dependent resistor (LDR) is a passive component that changes its resistance based on light intensity. Also known as photoresistors, photocells, or photoconductors, LDRs are made from semiconductor materials with high resistance in darkness and low resistance in light. They are commonly used as light sensors in street lighting, alarm clocks, burglar alarms, and light meters. What is a ...
LDR (Light Dependent Resistor) as the name states is a special type of resistor that works on the photoconductivity principle means that resistance changes according to the intensity of light. Its resistance decreases with an increase in the intensity of light. It is often used as a light sensor, light meter, Automatic street light, and in areas where we need to have light sensitivity. LDR is ...
A light-dependent resistor is a passive electronic component whose resistance decreases as the intensity of incident light increases. In darkness, an LDR exhibits high resistance, often in the megaohm (Ω) range, but when exposed to light, its resistance significantly drops to a few hundred ohms.
Complete light dependent resistor guide: understand photoconductivity, compare CdS vs CdSe types, and design LDR circuits for automatic lighting and sensing.
Conclusion Light Dependent Resistor (LDR) is a versatile and cost-effective component that play a crucial role in light-sensing applications. Their ability to change resistance based on light intensity makes them ideal for use in automatic lighting systems, camera light meters, burglar alarms, and more.