Planning for future updates can save customers a headache.

“Unplanned obsolescence” can happen to a PCB, so the printed circuit board designer must provide a few hooks to give the project a second chance.

Once upon a time, car stereos were almost universally interchangeable, so you could get a new, improved one off the shelf from your local specialty store. Upgrading car sound systems was my “side hustle” as a teenager. There were no how-to videos back then, but there are now.

That’s because it’s necessary! For my car, it starts with vents and the display screen at the top of the center stack and works through the HVAC control module. Then, you can pull the infotainment system out and hope it all clicks back into place afterwards. Who’s got time for that? (Life in the auto repair trade.)

No user-serviceable parts inside? Give me a break! The head unit is tough to get to, but the PCBs within the chassis use active components in quad-flatpack (QFP) packages rather than ball grid array (BGA) packages, which are more difficult, but certainly not impossible, to solder or desolder. The QFP’s perimeter pins are more accessible for the do-it-yourselfer. Functionally, these circuits provide entertainment to the driver, which is unrelated to safety, so a Class 2 PCB should be fine. Still, the BGA package is avoided as it doesn’t fit the high-reliability mindset of the auto industry. QFP devices permit more robust Class 3 circuit boards if the voice navigation aspect is considered a vital system and integrated with the audio.

PCB designers can have many different career pathways.

The route a PCB designer takes through the job market can lead to a number of different outcomes.

A board designer comes in with a knowledge set that helps transform an abstract schematic into physical electronics. A lot of that has to do with knowing what happens downstream from the day the artwork was created. The steps involved with PCB fabrication and assembly are complex, even for the simplest of jobs.

Take a factory tour and notice the rooms full of different machinery. Material is cut to shape and drilled in a kinetic energy field that makes so much noise. Vast plating lines do serial dunking in different vats of bubbling hazards. These are the CAD data manifested in copper for the first time.

Another room is more Zen, with tons of pressure and high temperature being applied. It’s a slow process, and the presses are very expensive. This is usually a small factory’s bottleneck. Down the hall, a brightly lit room full of automated optical inspection equipment ensures compliance. What we do on the monitors plays out across the factory.