I have a project where I may need 25+ accelerometers and magnetometers.
I see three options for sensors:
-Direct wire, which could be possible with shift registers
-I2c, however many sensors of the same brand only ship with 1 or 2 address options and I dont want to have dozens of different brands with with different protocols
-SPI, same problem as I2c.
I found the I2C sensors to be cheap, is there a way to use numerous sensors with the same address within one bus?
Some good ideas coupled with a lot of nonsense as usual 
Douglas gets the cookie. i was going to make something like this but decided that for $2 its better just get a few. Thanks Douglas!
Another method you might consider (it's cheaper for the parts but has other issues) would be to use a single micro with plenty of pins (50 spare IOs needed) and bit bang as many IC2 buses as you need. It needs to be star wired and the coding will require some care but you can get very good performance with the right micro.
The little LT chips look nice but you can see that their (LT's) hearts are analogue - who else would use resistor values to code an address 
MK
Good idea Michael,
You could use a $4 PSoC4 Prototyping Kit to implement a bunch of channels.
Good idea Michael,
You could use a $4 PSoC4 Prototyping Kit to implement a bunch of channels.
