Design review: Filtering

[krook]

Evaluate how to integrate filtering for better power management.

Currently, everything is powered from the same voltage rail and there is little to no filtering except for that which is supplied by the carrier boards for each component. This will not be sufficient for EMC best practices in production, and it will likely cause instrumentation issues as well.

Many of the sensors require precision analog measurements to convert the sensor signal to a digital or analog reading to be sampled by the processor. Without adequate power supply filtering and isolation, these sensors may not perform according to their specifications. Generally, the power supplies for each of these sensors will likely need to be isolated either with their own regulator (in the case of analog sensors, an LDO) or at a minimum they will need to be isolated through a ferrite bead or inductor with an appropriately selected frequency response. Care will also need to be taken with the conductor layout to minimize return path sharing or grounding issues.