{"product_id":"mcp23017-iic-to-16-bit-io-expansion-module","title":"MCP23017 IIC to 16 Bit IO Expansion Module","description":"\u003cp\u003eThe MCP23017 I2C 16-Bit I\/O Expansion Module adds more digital input and output pins to a microcontroller. It is useful when an Arduino, ESP32, Raspberry Pi, or other control board does not have enough available GPIO pins.\u003c\/p\u003e\n\u003cp\u003eThe module connects through the I2C interface, which only needs two communication lines: SDA and SCL. It provides 16 extra GPIO pins divided into two groups of eight. Each pin can be set as an input or output through your program.\u003c\/p\u003e\n\u003cp\u003eYou can use the added pins to control LEDs, relays, buttons, switches, buzzers, displays, and other digital parts. The module also supports internal pull-up resistors, which are helpful when connecting push buttons and switches.\u003c\/p\u003e\n\u003cp\u003eThree address pins allow up to eight MCP23017 devices to share one I2C bus. This means a project can have as many as 128 extra input and output pins while using the same SDA and SCL lines.\u003c\/p\u003e\n\u003cp\u003eThe MCP23017 also supports interrupt signals. It can alert the main controller when an input changes, reducing the need to check every pin repeatedly.\u003c\/p\u003e\n\u003cp\u003eThis expansion module is ideal for automation systems, robotics, control panels, LED projects, button boards, and school electronics activities. Its simple I2C connection helps reduce wiring while giving your project more control ports.\u003cbr\u003e\u003c\/p\u003e","brand":"circuitrocks","offers":[{"title":"Default Title","offer_id":53081160745249,"sku":"S088","price":348.0,"currency_code":"PHP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/1491\/5617\/files\/13_378fe156-d9c1-4c69-8ffb-48ec8b7490d6.png?v=1785129362","url":"https:\/\/circuit.rocks\/products\/mcp23017-iic-to-16-bit-io-expansion-module","provider":"circuitrocks","version":"1.0","type":"link"}