{"product_id":"photo-cell-cds-photoresistor-10pcs","title":"Photo Cell CdS Photoresistor 10pcs - LDR Pack","description":"\u003cdiv class=\"product-copy\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eCdS cells are little light sensors. As the squiggly face is exposed to more light, the resistance goes down. When its light, the resistance is about 5-10KΩ, when dark it goes up to 200KΩ.\u003c\/p\u003e\n\u003cp\u003eTo use, connect one side of the photo cell (either one, its symmetric) to power (for example 5V) and the other side to your microcontroller's analog input pin. Then connect a 10K pull-down resistor from that analog pin to ground. The voltage on the pin will be 2.5V or higher when its light out and near ground when its dark.\u003c\/p\u003e\n\u003cp\u003eCdS photocells are not RoHS compliant, so if you need something equivalent but RoHS compiant, check out the photo transistor.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eFor a full tutorial with wiring diagrams, code examples and project ideas, please read the photocell tutorial page!\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003eTECHNICAL DETAILS\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLength: 4.46mm\/0.18in\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWidth: 5mm\/0.20in\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeight: 2.09mm\/0.08in\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight: 0.25g\/0.01oz\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n.product-copy{line-height:1.7}\n.product-copy \u003e * + *{margin-top:1rem}\n.product-copy h2{margin:1.4em 0 .6em}\n.product-copy p{margin:0 0 1em}\n.product-copy ul,.product-copy ol{margin:0 0 1.2em 1.2em}\n.product-copy li{margin:.35em 0}\n.product-copy table{width:100%;border-collapse:collapse;margin:1.2em 0}\n.product-copy table th,\n.product-copy table td{border:1px solid #eee;padding:.6em .75em;text-align:left}\n.faq-list{margin:1.2rem 0 1.4rem}\n.faq{border:1px solid #e6e6e6;border-radius:12px;padding:.75rem 1rem;margin:.6rem 0;background:#fafafa}\n.faq summary{font-weight:600;cursor:pointer}\n@media (min-width:768px){ .product-copy{font-size:1.02rem} }\n\u003c\/style\u003e","brand":"Circuitrocks","offers":[{"title":"Default Title","offer_id":45814195683617,"sku":"AM269","price":59.0,"currency_code":"PHP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/1491\/5617\/products\/photo-cell-cds-photoresistor-10pcs-1391.jpg?v=1689674037","url":"https:\/\/circuit.rocks\/products\/photo-cell-cds-photoresistor-10pcs","provider":"circuitrocks","version":"1.0","type":"link"}