{"id":338,"date":"2025-11-20T19:51:51","date_gmt":"2025-11-20T19:51:51","guid":{"rendered":"https:\/\/hamtechtechnologies.com\/index.php\/product\/20x4-lcd\/"},"modified":"2025-11-30T09:54:06","modified_gmt":"2025-11-30T09:54:06","slug":"20x4-lcd","status":"publish","type":"product","link":"https:\/\/hamtechtechnologies.com\/index.php\/product\/20x4-lcd\/","title":{"rendered":"20&#215;4 LCD"},"content":{"rendered":"<p data-start=\"339\" data-end=\"945\">The <strong data-start=\"372\" data-end=\"391\">20\u00d74 LCD Module<\/strong> is a popular alphanumeric display module based on the HD44780 controller, capable of displaying 20 characters per line on 4 lines. It supports 4-bit or 8-bit parallel communication and can be interfaced directly with microcontrollers using digital I\/O pins or via I2C with an adapter. It is widely used in DIY electronics, IoT, robotics, and embedded systems for displaying text, sensor readings, system status, and menus. Its backlight provides clear visibility in low-light conditions, and it\u2019s compact enough for integration into custom enclosures.<\/p>\n<p data-start=\"947\" data-end=\"965\"><strong data-start=\"947\" data-end=\"963\">Key Features<\/strong><\/p>\n<ul data-start=\"966\" data-end=\"1238\">\n<li data-start=\"966\" data-end=\"1001\">\n<p data-start=\"968\" data-end=\"1001\">20 characters \u00d7 4 lines display<\/p>\n<\/li>\n<li data-start=\"1002\" data-end=\"1038\">\n<p data-start=\"1004\" data-end=\"1038\">HD44780 or compatible controller<\/p>\n<\/li>\n<li data-start=\"1039\" data-end=\"1074\">\n<p data-start=\"1041\" data-end=\"1074\">Backlight for better visibility<\/p>\n<\/li>\n<li data-start=\"1075\" data-end=\"1122\">\n<p data-start=\"1077\" data-end=\"1122\">Supports 4-bit and 8-bit parallel interface<\/p>\n<\/li>\n<li data-start=\"1123\" data-end=\"1175\">\n<p data-start=\"1125\" data-end=\"1175\">Compatible with Arduino, ESP32, and Raspberry Pi<\/p>\n<\/li>\n<li data-start=\"1176\" data-end=\"1238\">\n<p data-start=\"1178\" data-end=\"1238\">I2C interface available with adapter for simplified wiring<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1240\" data-end=\"1254\"><strong data-start=\"1240\" data-end=\"1252\">Variants<\/strong><\/p>\n<ul data-start=\"1255\" data-end=\"1348\">\n<li data-start=\"1255\" data-end=\"1297\">\n<p data-start=\"1257\" data-end=\"1297\">Standard 20\u00d74 LCD (parallel interface)<\/p>\n<\/li>\n<li data-start=\"1298\" data-end=\"1348\">\n<p data-start=\"1300\" data-end=\"1348\">20\u00d74 LCD with I2C adapter (simpler connection)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1350\" data-end=\"1370\"><strong data-start=\"1350\" data-end=\"1368\">Specifications<\/strong><\/p>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1372\" data-end=\"1683\">\n<thead data-start=\"1372\" data-end=\"1395\">\n<tr data-start=\"1372\" data-end=\"1395\">\n<th data-start=\"1372\" data-end=\"1382\" data-col-size=\"sm\">Feature<\/th>\n<th data-start=\"1382\" data-end=\"1395\" data-col-size=\"sm\">Details<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1420\" data-end=\"1683\">\n<tr data-start=\"1420\" data-end=\"1458\">\n<td data-start=\"1420\" data-end=\"1435\" data-col-size=\"sm\">Display Type<\/td>\n<td data-col-size=\"sm\" data-start=\"1435\" data-end=\"1458\">20\u00d74 Alphanumeric<\/td>\n<\/tr>\n<tr data-start=\"1459\" data-end=\"1498\">\n<td data-start=\"1459\" data-end=\"1472\" data-col-size=\"sm\">Controller<\/td>\n<td data-start=\"1472\" data-end=\"1498\" data-col-size=\"sm\">HD44780 \/ Compatible<\/td>\n<\/tr>\n<tr data-start=\"1499\" data-end=\"1554\">\n<td data-start=\"1499\" data-end=\"1511\" data-col-size=\"sm\">Interface<\/td>\n<td data-start=\"1511\" data-end=\"1554\" data-col-size=\"sm\">4-bit \/ 8-bit parallel (I2C optional)<\/td>\n<\/tr>\n<tr data-start=\"1555\" data-end=\"1586\">\n<td data-start=\"1555\" data-end=\"1575\" data-col-size=\"sm\">Operating Voltage<\/td>\n<td data-start=\"1575\" data-end=\"1586\" data-col-size=\"sm\">5V DC<\/td>\n<\/tr>\n<tr data-start=\"1587\" data-end=\"1614\">\n<td data-start=\"1587\" data-end=\"1599\" data-col-size=\"sm\">Backlight<\/td>\n<td data-start=\"1599\" data-end=\"1614\" data-col-size=\"sm\">Yes (LED)<\/td>\n<\/tr>\n<tr data-start=\"1615\" data-end=\"1648\">\n<td data-start=\"1615\" data-end=\"1632\" data-col-size=\"sm\">Character Size<\/td>\n<td data-start=\"1632\" data-end=\"1648\" data-col-size=\"sm\">5 \u00d7 8 dots<\/td>\n<\/tr>\n<tr data-start=\"1649\" data-end=\"1683\">\n<td data-start=\"1649\" data-end=\"1662\" data-col-size=\"sm\">Dimensions<\/td>\n<td data-start=\"1662\" data-end=\"1683\" data-col-size=\"sm\">85 \u00d7 50 \u00d7 12 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"1685\" data-end=\"1703\"><strong data-start=\"1685\" data-end=\"1701\">Applications<\/strong><\/p>\n<ul data-start=\"1704\" data-end=\"1942\">\n<li data-start=\"1704\" data-end=\"1749\">\n<p data-start=\"1706\" data-end=\"1749\">Arduino, ESP32, and Raspberry Pi projects<\/p>\n<\/li>\n<li data-start=\"1750\" data-end=\"1803\">\n<p data-start=\"1752\" data-end=\"1803\">Sensor data display (temperature, humidity, etc.)<\/p>\n<\/li>\n<li data-start=\"1804\" data-end=\"1851\">\n<p data-start=\"1806\" data-end=\"1851\">Menu-driven interfaces for embedded systems<\/p>\n<\/li>\n<li data-start=\"1852\" data-end=\"1896\">\n<p data-start=\"1854\" data-end=\"1896\">Robotics and automation feedback screens<\/p>\n<\/li>\n<li data-start=\"1897\" data-end=\"1942\">\n<p data-start=\"1899\" data-end=\"1942\">DIY IoT dashboards and monitoring systems<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1944\" data-end=\"1978\"><strong data-start=\"1944\" data-end=\"1976\">Compatible Boards \/ Circuits<\/strong><\/p>\n<ul data-start=\"1979\" data-end=\"2129\">\n<li data-start=\"1979\" data-end=\"2006\">\n<p data-start=\"1981\" data-end=\"2006\">Arduino Uno, Mega, Nano<\/p>\n<\/li>\n<li data-start=\"2007\" data-end=\"2026\">\n<p data-start=\"2009\" data-end=\"2026\">ESP32 \/ ESP8266<\/p>\n<\/li>\n<li data-start=\"2027\" data-end=\"2057\">\n<p data-start=\"2029\" data-end=\"2057\">Raspberry Pi (GPIO or I2C)<\/p>\n<\/li>\n<li data-start=\"2058\" data-end=\"2129\">\n<p data-start=\"2060\" data-end=\"2129\">Any microcontroller supporting 4-bit\/8-bit or I2C LCD communication<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The <strong data-start=\"159\" data-end=\"178\">20\u00d74 LCD Module<\/strong> is a character display capable of showing 20 characters per line across 4 lines, ideal for Arduino, ESP32, Raspberry Pi, and other microcontroller projects.<\/p>\n","protected":false},"featured_media":512,"comment_status":"open","ping_status":"closed","template":"","meta":{"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""}},"product_brand":[],"product_cat":[57,364,356,128,125],"product_tag":[264,263],"class_list":{"0":"post-338","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-displays","7":"product_cat-display-modules","8":"product_cat-electronics-components","9":"product_cat-ic-chip","10":"product_cat-ics-semiconductors","11":"product_tag-20x4","12":"product_tag-lcd","14":"first","15":"instock","16":"taxable","17":"shipping-taxable","18":"purchasable","19":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product\/338","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/comments?post=338"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/media\/512"}],"wp:attachment":[{"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/media?parent=338"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=338"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=338"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}