{"product_id":"3190123","title":"Electronic Building Block Rotary Potentiometer Analog Knob Module","description":"\u003clink type=\"text\/css\" rel=\"stylesheet\" href=\"https:\/\/css.chinabrands.com\/css\/S2.css\"\u003e\u003cdiv class=\"xxkkk\"\u003e\n\u003cdiv\u003e  \u003c\/div\u003e\n\u003cdiv class=\"xxkkk2\"\u003eThe DEMO\u003cbr\u003e\u003cbr\u003eConnect the S port of the rotating potentiometer electronic block to the end A0 on the Arduino board and use the following procedure to read its analog value. Set the brightness and darkness of LED by simulation value.\u003cbr\u003e\u003cbr\u003eConst int led = 9; \/\/ the pin that the LED is attached to\u003cbr\u003e\u003cbr\u003eInt brightness = 0; \/\/ how bright the LED is\u003cbr\u003e\u003cbr\u003eVoid setup () {\u003cbr\u003e\u003cbr\u003e\/\/ declare pin 9 to be an output:\u003cbr\u003e\u003cbr\u003ePinMode (led, the OUTPUT);\u003cbr\u003e\u003cbr\u003e}\u003cbr\u003e\u003cbr\u003eVoid loop () {\u003cbr\u003e\u003cbr\u003eBrightness = analogRead (A0); \/\/use A0 to read the electrical signal\u003cbr\u003e\u003cbr\u003eBrightness = map (brightness, 0, 1023, 0, 255);\u003cbr\u003e\u003cbr\u003e\/ \/ set the brightness of the pin 9:\u003cbr\u003e\u003cbr\u003eAnalogWrite (led, brightness);\u003cbr\u003e\u003cbr\u003e} \u003c\/div\u003e\n\u003cdiv class=\"xkclear\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"xxkkk\"\u003e\n    \u003cdiv class=\"xxkkk20\"\u003e\n            \u003cstrong\u003eMaterial:\u003c\/strong\u003e PCB         \n    \u003c\/div\u003e\n      \u003cdiv class=\"xxkkk20\"\u003e\n            \u003cdiv style=\"display:none;\"\u003e0.010\u003c\/div\u003e             \u003cstrong\u003ePackage weight:\u003c\/strong\u003e 0.033 kg         \n    \u003c\/div\u003e\n      \u003cdiv class=\"xxkkk20\"\u003e\n            \u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 1X module         \n    \u003c\/div\u003e\n    \n\u003c\/div\u003e\n\u003cdiv class=\"xkclear\"\u003e\u003c\/div\u003e\n\n\n\n\n\n\n\n\u003c\/div\u003e","brand":"HitMint.com","offers":[{"title":"BLACK","offer_id":31129090359390,"sku":"319012301","price":2.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0098\/8522\/0964\/products\/145140-4273.jpg?v=1573639356","url":"https:\/\/www.hitmint.com\/products\/3190123","provider":"HitMint.com","version":"1.0","type":"link"}