{"product_id":"temperature-alarm-kit-thermistor-electronic-teaching-experiment-training-welding-diy-parts","title":"Temperature Alarm Kit Thermistor Electronic Teaching Experiment Training Welding DIY Parts","description":"\u003cdiv id=\"specification\"\u003e\u003c\/div\u003e\u003cdiv id=\"specification_end\"\u003e\u003c\/div\u003e\u003cp\u003e\u003cb\u003eFeature:\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eSize: 5.8*3.7cm \u003c\/p\u003e\u003cp\u003ePower supply voltage: DC 5V\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFunction introduction:\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eRP1, R1, R2, R3 and RT in the circuit form a temperature measuring bridge. When the temperature is below the preset temperature, the potential of pin 2 of UA741 is higher than that of pin 3, pin 6 of 741 outputs a low level, LED1 is on, and the buzzer does not sound, that is, no alarm. When the temperature rises, the resistance value of RT drops 741. The voltage of pin 2 drops with it. When the voltage of pin 2 is lower than the voltage of pin 3, pin 6 outputs a high level and starts to alarm. LED1 goes out\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003ePackage includes:\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e1 x DIY KIT\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/AA\/31\/0cac27de-dab2-46ef-97f1-aeed13d20f09.jpg\" style=\"width: 100%;\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/4E\/FE\/babbe1b3-eb28-49a4-b4e7-9645d0c5e907.jpg\" style=\"width:1000px\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/AA\/E4\/511faf66-6f8b-420c-9b36-ca10dbedd320.jpg\" style=\"width:1000px\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/EB\/9F\/893b4e79-fe87-456a-88b3-afe24ebc4e39.jpg\" style=\"width:1000px\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/B8\/C1\/87e22f0f-144b-4a74-8def-77d03777211a.jpg\" style=\"width:1000px\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/57\/5C\/3e4abaa1-f1e9-4c46-9fe4-e43f068546c8.jpg\" style=\"width:1000px\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/7A\/1D\/8fc7de07-8a0b-4d9c-aa36-6421b92529d1.jpg\" style=\"width:1000px\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/0F\/97\/f55ca5f3-8d46-4031-a3e4-8c0ac7069571.jpg\" style=\"width:1000px\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"http:\/\/imgmgr.banggood.com\/images\/oaupload\/banggood\/images\/BE\/CE\/c1b0cc32-4a7b-428a-8ddb-34b166d8215a.jpg\" style=\"width:1000px\"\u003e\u003c\/p\u003e","brand":"Electronic Pro","offers":[{"title":"Default Title","offer_id":35368574812316,"sku":"1709221","price":210.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2787\/9162\/products\/fed5131f-53a4-4f33-916a-4b1aed4e5cea.jpg?v=1596624853","url":"https:\/\/electronic-pro-south-africa.myshopify.com\/products\/temperature-alarm-kit-thermistor-electronic-teaching-experiment-training-welding-diy-parts","provider":"Electronic Pro ","version":"1.0","type":"link"}