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MCUs are cheap. So wasted I/O isn't that big a deal. I looked and couldn't find a small 8 pin AVR with I2C. Smallest is 28 pins so package size is still rather large but not a big deal.
@werid fishes: yea, thats what i was thinking would be the easiest.@dellagd: pretty much you would make it how you would normallly have it ready to be hooked up to an mcu then hook it up to the mcu on your board and use the mcu's i2c to hook it up to the bus. if you dont understand ill pm with with a better explanation.
hah, yea when i started i was scared s*#tless of the $50 robot and attempted the $40 robot instead.i think most people who have never been introduced to robotics would see a plastic box with wires coming out of it more easy than the same thing with no box, ie just a pcb with components soldered on.@dellagd, no we aren't really doing that sort of thing where they link together like that. we are doing something where its just a bunch of pcbs that can be linked via i2c.@all, ive put together an updated list of modules based on dunks list as he is a busy man and probably has netter things to be doing. if i have missed anything or you want something added please pm me about it. modules EDIT: i have added in I2C to my motor driver... this is the order i have my pins in (SDA-SCL-GND-+5V) is this correct?EDIT2: attached images to help
is there any way to measure in eagle?