Yocto and ESD protection - advice needed.
Posted: Jan 18th, '18, 15:18
Hi!
I noticed my Yocto and my x0x is both more sensitive to ESD than basically all my other gear. In the winter time when humidity is dropping these machines will sometimes reset when I touch their enclosure.
I had a discussion about this in a Swedish electronics forum where quite a few knowledgeable in electronics often participate. After having looked at the schematics many remarked that the ATmegas are poorly protected against ESD in these designs. Especially the Yocto. I got many tips but no real schematic suggestions.
They remarked the reset is not buffered properly, and that a capacitor of 100 nF between RESET and GND would be good.
Other ideas where better grounding, and TVS diodes. Also some people had concerns regarding the chrystal and that I should ground it’s metallic enclosure.
So now I wonder if others have had ESD problems with their Yocto and if someone has a successfully managed to make it less sensitive and in that case how this was done.
Here’s the discussion just in case, but it’s in Swedish:
http://elektronikforumet.com/forum/view ... =7&t=89602
I noticed my Yocto and my x0x is both more sensitive to ESD than basically all my other gear. In the winter time when humidity is dropping these machines will sometimes reset when I touch their enclosure.
I had a discussion about this in a Swedish electronics forum where quite a few knowledgeable in electronics often participate. After having looked at the schematics many remarked that the ATmegas are poorly protected against ESD in these designs. Especially the Yocto. I got many tips but no real schematic suggestions.
They remarked the reset is not buffered properly, and that a capacitor of 100 nF between RESET and GND would be good.
Other ideas where better grounding, and TVS diodes. Also some people had concerns regarding the chrystal and that I should ground it’s metallic enclosure.
So now I wonder if others have had ESD problems with their Yocto and if someone has a successfully managed to make it less sensitive and in that case how this was done.
Here’s the discussion just in case, but it’s in Swedish:
http://elektronikforumet.com/forum/view ... =7&t=89602