I've seen - but can't find :( - a couple of low-cost dataloggers (sub-$100) that sample a couple of analog channels to SD.
I'm looking for something I can use to help in postmortem analysis of some fielded equipment.
I need to sample two analog channels at around 250Hz; if I could get three channels, it would be gravy but not required. Need to be able to log for at least 24 hours; 48 would be better. 8 bit resolution is acceptable, but I'd prefer at least 12.
The unit must be battery-powerable, but does not need to be encased and nicely presented; I can put it in a jiffy box.
Any ideas?