{"product_id":"diy-high-precision-digital-inductance-meter-capacitance-meter-frequency-meter-kit","title":"DIY High Precision Digital Inductance Meter Capacitance Meter Frequency Meter Kit","description":"\u003cdiv style=\"color: rgb(0, 0, 0); font-family: Arial, Verdana, sans-serif;  font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px;\"\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style=\"color: rgb(0, 0, 0); font-family: Arial, Verdana, sans-serif;  font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px;\"\u003e \u003c\/div\u003e\u003cdiv style=\"color: rgb(0, 0, 0); font-family: Arial, Verdana, sans-serif;  font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px;\"\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:14px;\"\u003eThe circuit consists of comparator U1B, discharge transistor Q1, Q2, etc. Set the forward input of the comparator to Uc, (Uc = 0.632E,\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:14px;\"\u003eThe Rref is adjusted, and the measured capacitor CEx is connected to the reverse input terminal. When the pin of P15 is low level, the capacitor discharges.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:14px;\"\u003eNote that the pull current of 51 single chip pin is very small, and Q1 can not be directly driven, otherwise the discharge time will be very long.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:14px;\"\u003eWhen P15 pin of MCU is high level, capacitor charges, when charged to Uc, comparator flips and triggers outside MCU.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:14px;\"\u003eThe capacitance can be calculated by measuring the charging time and the charging resistance.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv style=\"color: rgb(0, 0, 0); font-family: Arial, Verdana, sans-serif;  font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px;\"\u003e \u003c\/div\u003e\u003cdiv style=\"color: rgb(0, 0, 0); font-family: Arial, Verdana, sans-serif;  font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003ePackage Included:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"font-size:14px;\"\u003e1 x DIY High Precision Digital Inductance Meter Kit\u003c\/span\u003e\n\u003c\/div\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/1A\/51\/38c36c72-b06f-4495-b382-23a7f722736b.jpg\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/3F\/F6\/eca7bbd4-99f1-4d10-9b8e-5349ed1f4859.JPG\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/69\/37\/a0bffb4e-73dc-4106-a57e-7a668e8f7aae.JPG\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/86\/62\/829d2334-c27f-4ff9-930c-ab04b66c8592.JPG\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/3C\/07\/f87ce0ca-e33c-497e-a80d-706f63b91127.JPG\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/46\/F6\/fa3d981f-17d3-4876-96e4-f8ac8cd19df3.JPG\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/03\/EF\/b24b028c-aae5-4820-90ff-60c30e8da447.JPG\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/8A\/DE\/bee5e425-b014-4741-8286-5d020688d06b.JPG\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/5C\/19\/482f9af3-9f86-4be4-88c2-3c4808add8fb.JPG\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/img.staticbg.com\/images\/oaupload\/banggood\/images\/E3\/87\/f0688def-828d-4c6c-9c61-b409c6c564ff.JPG\"\u003e","brand":"Shopify","offers":[{"title":"Title","offer_id":32129059717210,"sku":"1393180","price":750.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2787\/9162\/products\/38c36c72-b06f-4495-b382-23a7f722736b_3930dc53-996d-4b37-a18d-9d0c681f298d.jpg?v=1587138590","url":"https:\/\/electronic-pro-south-africa.myshopify.com\/products\/diy-high-precision-digital-inductance-meter-capacitance-meter-frequency-meter-kit","provider":"Electronic Pro ","version":"1.0","type":"link"}