Instead of trying to read 900 sensors at once why not read one sensor 900 times
As far as I know, the arduino only has one ADC, so you can only read one sensor at a time.
Think about this:
The ADC can do a reading in 0.1 ms. (10,000 reads/second). So 900 reads should take around 0.1 seconds, but you also have to work the sensor multiplexing (remember, only one ADC), store the data, do something with the data, and send the data to your output device.
Oh, and the Arduino only has 2K SRAM... That might be enough for one exposure.
No one is saying it can't be done. As a learning project it has merit. But it would be like watering your garden with a leaky thimble... it would take a while and not produce good results.
The reason I am designing from scatch is over the past two years of my degree we've done probably 30 different experiments on all different types of sensors, we study the science behind imgaging. This would be for my final project and I feel that they have tough us everything we need to know to be able to make it logically work - but they haven't taught us is how to actually put a sensor together and practically go through the proccess, only theory - so i thought it would be a good idea.
However like I said I have no knowledge of the electronics, thinking about it now, I don't actualy have to use flash lighting, I can shoot under constant light for a longer duration.
John when you say 2k, would that be during the total time of the exicutable program or would I be able to, and if this is in the right terms, read a sensor, run it through the ADC, save the data and move onto the next sensor, but empty the sdram between?