This Matrix Keypad 4 X 4 has 16 buttons, arranged in a telephone-line 3x4 grid with a column of 4 characters (A, B, C, and D). The keys are connected into a matrix, hence only 8 microcontroller pins (4-columns and 4-rows) are required to scan the pad.
It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad.
My item was received with the Seeed Studio factory seal broken and scratches visible on the device. Think assured me they open every product for QC checks yet somehow they missed these scratches. Without the factory seal there's no way to tell if this is a new device and there's no way to get support from Seeed since they're terms for returns require devices to be factory sealed. I've contacted Seeed Studios so hopefully Think will no longer be able to sell Seeed products.
{"id":1416939470920,"title":"Membrane 4X4 Matrix Keypad + Extras","handle":"membrane-4x4-matrix-keypad-extras","description":"\u003cp\u003e\u003cspan\u003eThis \u003c\/span\u003e\u003cstrong\u003eMatrix Keypad 4 X 4\u003c\/strong\u003e\u003cspan\u003e has 16 buttons, arranged in a telephone-line 3x4 grid with a column of 4 characters (A, B, C, and D). The keys are connected into a matrix, hence only 8 microcontroller pins (4-columns and 4-rows) are required to scan the pad.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDetails:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePad Size: 76 x 76 x 0.8mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCable length: 85mm (include connector)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConnector: dupont 7 pins, 0.1 inch (2.54mm) Pitch\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMount style: Self-Adherence\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. circuit rating: 35VDC, 100mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInsulation spec.: 100M Ohm, 100V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDielectric withstand: 250Vrms (60Hz, 1min)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eContact bounce: ≤5ms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLife expectancy: 1 million closures\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWeight: 7.5g\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0014\/4313\/5560\/files\/4x4-Keypad-Schematic_480x480.png?v=1593465118\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0014\/4313\/5560\/files\/4x4-Keypad-Dimensions_480x480.png?v=1593465133\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cspan\u003eResources\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/github.com\/thinkrobotics\/DATASHEET\/tree\/master\/ELECTRONIC_COMPONENTS\/ELC7015\"\u003e\u003cspan\u003eDatasheet\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/github.com\/thinkrobotics\/LIBRARIES\/tree\/master\/ELECTRONIC_COMPONENTS\/ELC7015\"\u003e\u003cspan\u003eLibrary\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/github.com\/thinkrobotics\/LIBRARIES\/tree\/master\/ELECTRONIC_COMPONENTS\/ELC7015\"\u003e\u003cspan\u003eSample Code\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cspan\u003eTutorial\u003c\/span\u003e\u003c\/h5\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/yYnX5QodqQ4\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/qIDzzG2LUtg\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e","published_at":"2022-12-06T11:27:39+05:30","created_at":"2018-09-01T14:06:18+05:30","vendor":"ThinkRobotics","type":"Control Switch","tags":["4 X 4","4X4","ELC7","IN-MOD","Input Device","Keyboard","Keypad","ZOHO UPDATED"],"price":9999,"price_min":9999,"price_max":9999,"available":false,"price_varies":false,"compare_at_price":10500,"compare_at_price_min":10500,"compare_at_price_max":10500,"compare_at_price_varies":false,"variants":[{"id":12744475213896,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"ELC7015","requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"Membrane 4X4 Matrix Keypad + Extras","public_title":null,"options":["Default Title"],"price":9999,"weight":10,"compare_at_price":10500,"inventory_management":"shopify","barcode":"ELC7015","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/products\/1_31134f8d-eab8-4597-a147-4768d6f73ff0.jpg?v=1577794129","\/\/thinkrobotics.com\/cdn\/shop\/products\/2_393d9cff-f026-4882-af10-dd193e7b8210.jpg?v=1577794129","\/\/thinkrobotics.com\/cdn\/shop\/products\/3_b6e388af-0316-4993-bbe8-fefdd42c2526.jpg?v=1577794129"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/products\/1_31134f8d-eab8-4597-a147-4768d6f73ff0.jpg?v=1577794129","options":["Title"],"media":[{"alt":"Membrane 4X4 Matrix Keypad + Extras","id":798718427208,"position":1,"preview_image":{"aspect_ratio":1.0,"height":497,"width":497,"src":"\/\/thinkrobotics.com\/cdn\/shop\/products\/1_31134f8d-eab8-4597-a147-4768d6f73ff0.jpg?v=1577794129"},"aspect_ratio":1.0,"height":497,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/products\/1_31134f8d-eab8-4597-a147-4768d6f73ff0.jpg?v=1577794129","width":497},{"alt":"Membrane 4X4 Matrix Keypad + Extras","id":798718459976,"position":2,"preview_image":{"aspect_ratio":1.0,"height":497,"width":497,"src":"\/\/thinkrobotics.com\/cdn\/shop\/products\/2_393d9cff-f026-4882-af10-dd193e7b8210.jpg?v=1577794129"},"aspect_ratio":1.0,"height":497,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/products\/2_393d9cff-f026-4882-af10-dd193e7b8210.jpg?v=1577794129","width":497},{"alt":"Membrane 4X4 Matrix Keypad + Extras","id":798718492744,"position":3,"preview_image":{"aspect_ratio":1.0,"height":497,"width":497,"src":"\/\/thinkrobotics.com\/cdn\/shop\/products\/3_b6e388af-0316-4993-bbe8-fefdd42c2526.jpg?v=1577794129"},"aspect_ratio":1.0,"height":497,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/products\/3_b6e388af-0316-4993-bbe8-fefdd42c2526.jpg?v=1577794129","width":497}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e\u003cspan\u003eThis \u003c\/span\u003e\u003cstrong\u003eMatrix Keypad 4 X 4\u003c\/strong\u003e\u003cspan\u003e has 16 buttons, arranged in a telephone-line 3x4 grid with a column of 4 characters (A, B, C, and D). The keys are connected into a matrix, hence only 8 microcontroller pins (4-columns and 4-rows) are required to scan the pad.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDetails:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePad Size: 76 x 76 x 0.8mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCable length: 85mm (include connector)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConnector: dupont 7 pins, 0.1 inch (2.54mm) Pitch\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMount style: Self-Adherence\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. circuit rating: 35VDC, 100mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInsulation spec.: 100M Ohm, 100V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDielectric withstand: 250Vrms (60Hz, 1min)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eContact bounce: ≤5ms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLife expectancy: 1 million closures\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWeight: 7.5g\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0014\/4313\/5560\/files\/4x4-Keypad-Schematic_480x480.png?v=1593465118\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0014\/4313\/5560\/files\/4x4-Keypad-Dimensions_480x480.png?v=1593465133\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cspan\u003eResources\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/github.com\/thinkrobotics\/DATASHEET\/tree\/master\/ELECTRONIC_COMPONENTS\/ELC7015\"\u003e\u003cspan\u003eDatasheet\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/github.com\/thinkrobotics\/LIBRARIES\/tree\/master\/ELECTRONIC_COMPONENTS\/ELC7015\"\u003e\u003cspan\u003eLibrary\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/github.com\/thinkrobotics\/LIBRARIES\/tree\/master\/ELECTRONIC_COMPONENTS\/ELC7015\"\u003e\u003cspan\u003eSample Code\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cspan\u003eTutorial\u003c\/span\u003e\u003c\/h5\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/yYnX5QodqQ4\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/qIDzzG2LUtg\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e"}
