Comment on Digital buffer works for a bit, then stops, turning it off for an hour resets it to working again
litchralee@sh.itjust.works 2 days agoIf I had to guess, perhaps the buffer circuit is going onto latch-up due to ESD spikes, which is then locking the open drain to conduct, which is why you’re seeing a LOW output.
When in doubt, I suppose you can tack on more decoupling capacitors nearby the buffer’s Vcc.
avidamoeba@lemmy.ca 2 days ago
As an idiot, do I wire capacitors in parallel to Vcc and GND of the buffer? What value?
Also I have the same kind of buffer from TI. Is there any sense to change the IC and see if the TI fares better?
bitfucker@programming.dev 21 hours ago
Yes, sounds about right. For general purpose decoupling that is a good value. Make sure to place it as close to the IC as possible. A longer path will add more “noise” to the system. Do read more about the capacitor type too since it can matter a lot. I suggest looking at Phil’s Lab video on YouTube to learn more about this stuff