I’m running a Panda II project with audio shield through a 9V wall wart, and it also has a separate grounded 12V wall wart (with the grounds tied) to power some optocoupler connected RGB LED strips.
Occasionally when I pull the chain on my ceiling fan in the office, the Panda II freezes up. Of course this room has carpet and it happens when I’m wearing socks. Obviously static electricity is hitting the Panda through the house AC wiring/ground.
I haven’t had a chance to check debug and see if it’s throwing an exception yet. Possibly I can handle it on the software side, but I was also hoping there might be a hardware fix you guys know of.
This project is going to be permanently mounted in a hard to get to spot for a diorama my brother in law is putting together… and I really want to make it as robust as possible. Any ideas on how I can eliminate this problem?
And for anybody that is curious… he is building a really accurate replica of the Disneyland Pirates of the Caribbean auctioneer scene. I rigged up a remote control for two separate fire light effects and audio. Lighting/audio amp 12VDC is switched by a relay, and the Panda II hibernates when the 12VDC is removed.