Since the parts are all chosen, this section involves placing the components and then connecting them all together. As in any CE course, there is the potential for rip-up, as that is a natural part of any design.
Lesson Topics
- ERC Checking
- nRF52 Support Component Placement
- BG95-EG91 Support Component Placement
- Battery management component placement
- 3V3 regulator component placement
- Choosing a board house by spacing capabilities
- Initial Power Plane Placement
- Escaping the nRF52 pads on a 3.5 mil PCB process
- More nRF52 breakout and connector layout
- Initial power supply control signal layout
- Finishing connecting power supply signals
- The perils of inserting a forgotten component (TVS diodes)
- Finishing connecting the nRF52
- Routing level translator and SIM card components to BG95
- Finishing connections to the BG95
- Adding mousebites and cleaning up non-RF connections
- Controlled impedance for RF traces on the ABC
- Re-routing USB controlled impedance lines
- Adding new breaktabs and OpenOCD capabilities
- Adding the 2.4G antenna and clearance area
- Reviewing RF changes and finalizing RF connections
- Cleaning up all ABC DRC errors
- Copper cleanup, adding silkscreen, and generating gerbers
- Generating ABC output files and ordering PCBs
- Revising design based on CAM feedback
- A conversation with Roy Chen, Quectel FAE
- Revising the design based on Quectel feedback
- Final CAM fixes (with unknown problems)
- Creating a fab drawing template using a footprint