February 2014

10Dof added to bike logger I finally picked up the bike data logger again and added a 10def breakout board.
I thought it would be relatively easy to filter the accelerometer signal and derive bike inclination, but there is so much road vibration it's going to need a pretty cunning algorithm to sort that one out. I've even added the gyro signal via a Kalman filter algorithm I found on the web so I can show heading by tilt compensating the magnetometer. But it's the same challenge, filtering...
Calibrating all three sensors correctly is key too.
Meanwhile I have found a useful way to reference the vBattery ADC using the 328's internal reference quoted by Hardware Hacking, which I'll include in the logger code at some point.