{"id":9207,"date":"2025-12-09T09:17:14","date_gmt":"2025-12-09T09:17:14","guid":{"rendered":"https:\/\/www.diyipcb.com\/?post_type=product&#038;p=9207"},"modified":"2026-09-27T15:06:04","modified_gmt":"2026-09-27T15:06:04","slug":"mt8870-dtmf-voice-decoding-module-phone-module-speech-decoding-voice-board-module-led-indicators-with-pins","status":"publish","type":"product","link":"https:\/\/www.diyipcb.com\/de\/produkt\/mt8870-dtmf-voice-decoding-module-phone-module-speech-decoding-voice-board-module-led-indicators-with-pins\/","title":{"rendered":"MT8870 DTMF-Sprachdekodierungsmodul, Telefonmodul, Sprachdekodierungsmodul, Sprachplatinenmodul, LED-Anzeigen mit Pins"},"content":{"rendered":"<p>Nach dem Empfang des DTMF-Signals teilt der MT8870 dieses intern in hohe und niedrige Frequenzb\u00e4nder auf und sendet es an einen Digitaldecoder. Dieser dekodiert die Tastenwerte und gibt sie anschlie\u00dfend bin\u00e4r \u00fcber vier Leitungen (Q1, Q2, Q3, Q4) an einen externen Bus aus. Wichtig ist, dass der STD-Pin des MT8870 beim Ermitteln und Ausgeben eines Tastenwerts kurzzeitig von Low auf High wechselt und dann wieder auf Low zur\u00fcckf\u00e4llt. Dieses Verhalten kann genutzt werden, um das Signal an diesem Pin zu erkennen, die von den Pins Q1 bis Q4 generierten Werte direkt in die CPU einzulesen und so den Tastenwert des Telefons zu ermitteln.<\/p>\n<p><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/mt8870-dtmf-voice-decoding-mod_1.jpg\" \/><\/p>\n<p>PRODUKTINFORMATIONEN:<\/p>\n<p>Versorgungsspannung: 5 V Gleichstrom<\/p>\n<p>Spitzenstrom: 10 mA<\/p>\n<p>Betriebstemperatur: -65 \u2103~150 \u2103<\/p>\n<p>Maximale Leistungsaufnahme: 500 mA<\/p>\n<p><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/mt8870-dtmf-voice-decoding-mod_2.jpg\" \/><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/mt8870-dtmf-voice-decoding-mod_3.jpg\" \/><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/mt8870-dtmf-voice-decoding-mod_4.jpg\" \/><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/mt8870-dtmf-voice-decoding-mod_5.jpg\" \/><\/p>\n<div class=\"simg-pop-btn\" style=\"top: 166px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 1059.22px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 1059.22px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3477.89px; left: 14px; display: none;\" data-hover=\"0\"><\/div>\n<section class=\"module-customization\">\n<h3>Produktanpassung<\/h3>\n<p>Wir unterst\u00fctzen Dienstleistungen zur Produktindividualisierung. <a href=\"https:\/\/www.diyipcb.com\/de\/contact-us\/\">Kontaktieren Sie uns<\/a> um Ihre Anforderungen zu besprechen.<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>After receiving the DTMF signal, MT8870 internally divides the signal into high and low frequency bands, and sends this signal to a digital decoder. The key values are decoded by the digital decoder, and then the decoded key values are output in binary form on four lines (Q1, Q2, Q3, Q4) to an external shared&#8230;<\/p>","protected":false},"featured_media":5304,"comment_status":"open","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[94,101,2098],"product_tag":[],"class_list":["post-9207","product","type-product","status-publish","has-post-thumbnail","product_cat-electronic-modules","product_cat-prototyping-expansion","product_cat-prototyping","first","instock","shipping-taxable","purchasable","product-type-simple","entry","content-bg","loop-entry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product\/9207","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/comments?post=9207"}],"version-history":[{"count":0,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product\/9207\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/media\/5304"}],"wp:attachment":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/media?parent=9207"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_brand?post=9207"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_cat?post=9207"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_tag?post=9207"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}