Synchronised Arduino Micro for measurements and data logging

Morning all,

I'd need some advice about a project I'd like to start. I want to do on-board measurements in a train model, with pressure transducers, accelerometers and inclinometers.

I've Googled how to acquire voltages using Arduino and save it to a SD card, which looks quite trivial. Using an Arduino Mega would give me 16 analog inputs but I would like to use more. So I thought about synchronising different Arduinos to get more analog inputs.

Does it look feasible? Ideally I could add several Arduinos to acquire even more data at the same time.

Thanks for any advice that could help me.

Frederick

You may want to look at the ADC subsystem, and revisit your definition of "at the same time"

So I thought about synchronising different Arduinos to get more analog inputs.

Most beginners think that and they are wrong. The simplest solution is to use a multiplexer in front of the analogue inputs.

A 4051 chip will give you eight inputs on each chip and you can put one chip on each analogue input. So that is 16 * 8 = 128 inputs. If that is not enough their are techniques to get more.