{"id":4445193961590,"title":"Adafruit MCP23008 - i2c 8 input\/output port expander","handle":"adafruit-mcp23008-i2c-8-input-output-port-expander","description":"\u003cp\u003eAdd another 8 pins to your microcontroller using a MCP23008 port expander. The MCP23008 uses two i2c pins (these can be shared with other i2c devices), and in exchange gives you 8 general purpose pins. You can set each of 8 pins to be input, output, or input with a pullup. There's even the ability to get an interrupt via an external pin when any of the inputs change so you don't have to keep polling the chip.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eUse this chip from 2.7-5.5V (good for any 3.3V or 5V setup), and you can sink\/source up to 20mA from any of the I\/O pins so this will work for LEDs and such. Team it up with a high-power MOSFET if you need more juice. DIP package means it will plug into any breadboard or perfboard.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eYou can set the i2c address by tying the ADDR0-2 pins to power or ground, for up to 8 unique addresses. That means 8 chips can share a single i2c bus - that's 64 I\/O pins!\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eWe used this chip in our SPI\/i2c backpack and found it to be very reliable and easy to get up and running.\u003c\/p\u003e","published_at":"2020-03-30T13:18:31-04:00","created_at":"2020-03-30T13:17:14-04:00","vendor":"Adafruit","type":"Adafruit","tags":[],"price":190,"price_min":190,"price_max":190,"available":true,"price_varies":false,"compare_at_price":195,"compare_at_price_min":195,"compare_at_price_max":195,"compare_at_price_varies":false,"variants":[{"id":31513581584502,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"K630","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Adafruit MCP23008 - i2c 8 input\/output port expander","public_title":null,"options":["Default Title"],"price":190,"weight":0,"compare_at_price":195,"inventory_quantity":0,"inventory_management":"shopify","inventory_policy":"continue","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/593-01.jpg?v=1585588634"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/593-01.jpg?v=1585588634","options":["Title"],"media":[{"alt":null,"id":6286137917558,"position":1,"preview_image":{"aspect_ratio":1.332,"height":728,"width":970,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/593-01.jpg?v=1585588634"},"aspect_ratio":1.332,"height":728,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/593-01.jpg?v=1585588634","width":970}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eAdd another 8 pins to your microcontroller using a MCP23008 port expander. The MCP23008 uses two i2c pins (these can be shared with other i2c devices), and in exchange gives you 8 general purpose pins. You can set each of 8 pins to be input, output, or input with a pullup. There's even the ability to get an interrupt via an external pin when any of the inputs change so you don't have to keep polling the chip.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eUse this chip from 2.7-5.5V (good for any 3.3V or 5V setup), and you can sink\/source up to 20mA from any of the I\/O pins so this will work for LEDs and such. Team it up with a high-power MOSFET if you need more juice. DIP package means it will plug into any breadboard or perfboard.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eYou can set the i2c address by tying the ADDR0-2 pins to power or ground, for up to 8 unique addresses. That means 8 chips can share a single i2c bus - that's 64 I\/O pins!\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eWe used this chip in our SPI\/i2c backpack and found it to be very reliable and easy to get up and running.\u003c\/p\u003e"}