Introduction: Extra Io Pins MCP23017

did you ever runned out of io pins? Than is here the solution.

Step 1: Part List

you only need a arduino and a mcp23017 (ebay)

Step 2: Watch the Video

watch this video!

Step 3: Upload the Code

Upload this code(put them all in one map)

Step 4: Subscribe

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Comments

author
Eric+Brouwer made it!(author)2015-06-07

The MCP23017 is not a shift register, but an I2C port expander chip. It does work great to increase number of I/O ports, but it can also be used to reduce the number of wires running from one PCB to another. I love this chip.

See my application at https://www.instructables.com/id/8-Channel-Programm...

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author
wout.vandenreeck made it!(author)2015-06-07

I checked out your project! It's a really nice instructable! I changed the title ;)