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While messing around with twi (that’s what atmel calls i2c) some time ago, i built this little device that does nothing more than listening to the bus and display all the bytes it receives on a two-digit 7-segment-display in hex-format. the motivation for this project was not only “i need this thing” but also “i’m tired of coding and want to solder something. and i have to get rid of these displays anyway”. the schematic and layout was done in eagle. an atmega8-controller (overkill) handles bus and display. the whole device is powered by the bus.

here’s two pics:

top side of i2c-slave

bottom side of i2c-slave

yes, i forgot one line😦

2 Comments

  1. When I initially commented I appear to have clicked on the
    -Notify me when new comments are added- checkbox and from now on each time
    a comment is added I get 4 emails with the same comment.

    There has to be a means you are able to remove me from that service?
    Cheers!


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