Synchronised Arduino Micro for measurements and data logging

Using Arduino Project Guidance
#1

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

#2

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

#3

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.

#4