I/O expanders
This is my offer for the smallest design on the MCP23017 I/O expander in bi-directional mode:
It's possible to smoosh an SOIC with 0603 SMD down to 23mm x 107mm (0.9in x 4.2in), with no support holes (I slide them vertically around the enclosure perimeter. The headers should make for easy access.
Circuit looks like this:
Hopefully I didn't do something real dumb, like on my prototype (A0-2 wired wrong, can only get 111 without hot-jumping wires)
Last edited by Demon; - 3rd June 2024 at 20:53.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
|
Re: I/O expanders
Am I the only person that can't stand having VSS above, and VDD below?
I had to go and fix the caps so VDD was above, and VSS below.
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
|
Re: I/O expanders
No, you are not alone! Don't like it, can't stand it!
And bothers me alot when schematics from big companies do that on purpose, to just make your day miserable!
Ioannis
Members who have read this thread : 11You do not have permission to view the list of names.
Posting Permissions
Reply With Quote
Bookmarks