This Arduino based project will let you record up to 7 analog voltages with an easily changed sample rate. Sample every second and run for 2 1/4 hours. Sample every 60 seconds and run for 75 hours.
Both hardware and software details are provided including the artwork for the board, parts list, hardware test plan, and the software as a text file.
The software is an example of "defensive programming". Errors generated by software bugs and hardware faults are detected, recorded, and reported. High-level status is visible by counting flashes on an LED. Details come via the USB interface. Furthermore, the software is able to automatically recover from power disruptions with no loss of recorded data.
If you are interested, please see
for the software description:
for the hardware description: https://rick.sparber.org/FlightDataR...escription.pdf
for the code as a text file (must change to .ino to use):
Your comments are welcome. All of us are smarter than any one of us.