{"product_id":"adc-analog-key-module-reads-five-buttons-via-single-pin-building-block-casing-ph2-0-interface-compatible-with-arduino-esp32","title":"ADC Analog Key Module Reads Five Buttons via Single Pin, Building Block Casing \u0026 PH2.0 Interface, Compatible with Arduino ESP32","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNullLab\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChoice\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eyes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCondition\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNew\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003enone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePackage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eSMD\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSupply Voltage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e6-16V\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eLogic ICs\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eis_customized\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S9230e710670940cd93ff112bfdc779bes.png\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style='background-color:rgb(252, 220, 0);font-size:22px;font-family:\"times new roman\", times, serif'\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eADC button module is an electronic component that uses analog-to-digital conversion technology (ADC) to achieve button detection. The core principle is to distinguish different buttons through resistor voltage division: each button is connected to a specific resistor, which generates a unique voltage value when pressed. The ADC chip converts the analog voltage into a digital signal, which is recognized by the microcontroller for the corresponding button. Compared to traditional matrix keyboards, it significantly saves IO port resources, only requires a single ADC channel to support 5 keys, and has a simple circuit structure and lower cost. The main advantages include simplified wiring, strong anti-interference ability (which can be eliminated by software filtering), and flexible expansion, but attention should be paid to resistance accuracy and power supply stability to avoid misjudgment. Typical applications include scenarios with limited IO resources such as smart home panels, industrial controllers, and portable devices.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style='background-color:rgb(252, 220, 0);font-size:22px;font-family:\"times new roman\", times, serif'\u003eschematic diagram\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/docs.emakefun.com\/zh-cn\/ph2.0_sensors\/base_input_module\/adc_button_module\/picture\/schematic_diagram.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style='background-color:rgb(252, 220, 0);font-size:22px;font-family:\"times new roman\", times, serif'\u003eModule parameters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003eSupply voltage: 3~5V\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eConnection method: PH2.0-3pin cable\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eNumber of module buttons: 5\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eSize: 38.4x22.4mm\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eInstallation method: M4 screws compatible with Lego socket for fixation\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style='background-color:rgb(252, 220, 0);font-size:22px;font-family:\"times new roman\", times, serif'\u003eSize chart\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cimg width=\"750\" height=\"auto\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S781f44d6acb14b748fb1099ea7cc4696o.png\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S6b786e2256fd4380b4324972ac0c9699m.png\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S8a63b1ff517a4199b99848556d5f0e2eh.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sbc5bd29a0e02492fb7bf119a82e6ac1aa.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sb79f32bf84654fb7ad8b302258ba1753s.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sdcb8348e93e540bbae9eace468c0a36cx.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S7a39d1d68859452bbc2409eab960e7d3L.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sf524379dac4b44de92ba72cd31e295a25.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S37398f3a37eb47a498b24e060ba11c82M.png\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S82a8950f98d74552aef78abd35f0e4070.png\" slate-data-type=\"image\"\u003e\u003c\/p\u003e","brand":"Yoeruyo","offers":[{"title":"ADC-5-digit button","offer_id":55421250404651,"sku":"14:1202#ADC-5-digit button","price":15.93,"currency_code":"USD","in_stock":true},{"title":"ADC with case","offer_id":55421250437419,"sku":"14:350852#ADC with case","price":16.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/5744\/8747\/files\/S38f1e8dfea314880a6aec5e2696af330h.webp?v=1788512975","url":"https:\/\/yoeruyo.com\/products\/adc-analog-key-module-reads-five-buttons-via-single-pin-building-block-casing-ph2-0-interface-compatible-with-arduino-esp32","provider":"Yoeruyo","version":"1.0","type":"link"}