{"product_id":"gl5528-ldr-photoresistor-light-sensor-5mm-through-hole-arduino-20pack","title":"GL5528 LDR Photoresistor Light Sensor — 5mm, Through-Hole, Arduino (20-Pack)","description":"\u003ch2\u003eGL5528 LDR Photoresistor Light Sensor — 5mm Through-Hole (20-Pack)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eGL5528\u003c\/strong\u003e is a cadmium sulfide (CdS) light-dependent resistor (LDR) in a standard \u003cstrong\u003e5mm through-hole\u003c\/strong\u003e package. Its resistance drops dramatically from ~1MΩ in darkness to ~10kΩ in bright light, making it ideal for automatic brightness control, light-activated switches, and ambient light sensing in Arduino and embedded projects.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eGL5528\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003e5mm Through-Hole (radial)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDark Resistance\u003c\/td\u003e\n\u003ctd\u003e~1MΩ (at 0 lux)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Resistance @ 10 lux\u003c\/td\u003e\n\u003ctd\u003e10kΩ – 20kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGamma Value (γ)\u003c\/td\u003e\n\u003ctd\u003e0.7 typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Voltage\u003c\/td\u003e\n\u003ctd\u003e150V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Power Dissipation\u003c\/td\u003e\n\u003ctd\u003e100mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Peak\u003c\/td\u003e\n\u003ctd\u003e~540nm (green-yellow)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e−30°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e20 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose GL5528?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Sensitivity\u003c\/strong\u003e — 100:1 resistance ratio between dark and 10-lux conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreadboard-Friendly\u003c\/strong\u003e — 5mm through-hole leads fit standard 2.54mm pitch breadboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Polarity\u003c\/strong\u003e — Passive component, connect in either direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Spectral Response\u003c\/strong\u003e — Peak at 540nm matches human eye sensitivity for natural light sensing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack of 20\u003c\/strong\u003e — Ideal for classroom kits, prototyping, and small production\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eArduino automatic LED dimming and night-light circuits\u003c\/li\u003e\n\u003cli\u003eLight-activated relay switches (street lights, garden lights)\u003c\/li\u003e\n\u003cli\u003eAmbient light sensing for display brightness control\u003c\/li\u003e\n\u003cli\u003eLine-following robot light sensors\u003c\/li\u003e\n\u003cli\u003eAlarm systems with light-beam interruption detection\u003c\/li\u003e\n\u003cli\u003ePhotography light meters and exposure control\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eArduino Wiring\u003c\/h3\u003e\u003cp\u003eUse as a voltage divider: connect GL5528 between VCC and analog pin, with a 10kΩ resistor from analog pin to GND. Read with \u003ccode\u003eanalogRead(A0)\u003c\/code\u003e. Higher value = darker environment.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: What’s the difference between GL5516, GL5528, and GL5537?\u003c\/strong\u003e\u003cbr\u003eA: They differ in light resistance range. GL5516: 5–10kΩ; GL5528: 10–20kΩ; GL5537: 20–50kΩ at 10 lux. GL5528 is the most common general-purpose choice.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can GL5528 be used outdoors?\u003c\/strong\u003e\u003cbr\u003eA: Yes, within −30°C to +70°C. Protect from direct moisture; CdS cells are not waterproof.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e20× GL5528 5mm LDR Photoresistor\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"5516","offer_id":46991484518635,"sku":"696:202391807#5516","price":6.2,"currency_code":"USD","in_stock":true},{"title":"5506","offer_id":46991484551403,"sku":"696:200000170#5506","price":6.2,"currency_code":"USD","in_stock":true},{"title":"5528","offer_id":46991484584171,"sku":"696:201215958#5528","price":6.2,"currency_code":"USD","in_stock":true},{"title":"5537","offer_id":46991484616939,"sku":"696:202391806#5537","price":6.2,"currency_code":"USD","in_stock":true},{"title":"5539","offer_id":46991484649707,"sku":"696:203121823#5539","price":6.2,"currency_code":"USD","in_stock":true},{"title":"5549","offer_id":46991484682475,"sku":"696:203121824#5549","price":6.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/ldr-gl5528-photoresistor.webp?v=1761543759","url":"https:\/\/keszoox.com\/products\/gl5528-ldr-photoresistor-light-sensor-5mm-through-hole-arduino-20pack","provider":"Keszoox","version":"1.0","type":"link"}