HP-48 FRAM Cards

[Dave Frederickson]

(08-19-2016 12:06 AM)JDW Wrote:  Seriously, from day one I was concerned about that FRAM card design (even the SRAM cards from that same seller) simply due to "static discharge." As you know, all the old HP and third party cards were made very well in that they were completely covered. Not only did that protect the expensive circuitry from death-by-static, but it also covered the PCB so your eyes are never distracted!

I can think of two possible solutions to the ESD issue.
1. Conformal coat the board. UR and AR conformal coating is available in spray cans. Don't forget to mask all the pertinant electrical connections first.
2. If spraying the board isn't your thing, you can apply Kapton tape.

Dave