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Arduino w/ I2C RealTimeClock and LCD

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Uploaded by on Oct 15, 2007

This is the latest instalment of the Arduino saga! The Arduino is used to drive an LCD controlled with a PCF8574 IO expander and a DS1803 dual digital pot. It also communicates with the DS1337 RTC. The time is set by sending a unix time stamp over serial. The Arduino does all the gmt offset and dst calculation!

More info on this pict http://flickr.com/photos/xsmurf/1579183139/

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Howto & Style

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Uploader Comments (xsmurf)

  • Is the "I/O expander" a shift register? You need a Boarduino! Nice project...

  • No, it's a PCF8574 I2C bidirectional IO expander. Everything on there is (the temp sensor has been changed to a ds1624 I2C 13-bit temp sensor). Yes I wished I had one indeed! Thanks :)

  • Where did you get the LCD screen?

  • eBay, where else ;D

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All Comments (4)

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  • which pins are being used? presumably the default wire.h pins

  • Great i'm looking for the library and specialy the code.

    i can only find a non working MCP23008 sample code

    would you like to help please.

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