I've finished my test rig: Mega2560 + Seeed SD Card Shield + Adafruit LSM6DS33
It works. Had to switch from the Uno due to memory requirements. I can log 30 seconds of data at 100hz sample rate. So I'm OK with proof of concept.
Now it time to move to first prototype changing from the LSM6DS33 to 3 BNO085 (Adafruit)
- 2 or 3 MPU-6050 (Adafruit)
- Sparkfun 8 channel Mux
- 2 SparkFun QwiicBus - EndPoint.
I realize I cannot continue to power from the 3.3v line on the Mega. Suggestions on how to power this would be appreciated. A mains based power supply will work for now but eventually I want to make this a mobile device with it own mini-display and small keyboard .