Matt Mets @cibomahto@v.st
Joined Nov 2022
Just when I thought I had defeated modemmanager and recovered my USB serial devices, a new (old?) challenger appears!
The printed test jig seems fine- even with the wrong size plunger hardware (oops) and lazy standoffs, the test pins make contact. I put x marks on the PCB insert plates- those can be swapped out to use the jig to test a different board.
I'd really like a way to attach a USB host controller (not just pass through single devices) to a virtual machine, to make remote USB device development more realistic. Anyone know of a device that does this, even just for USB 2? The diagram shows a possible way to do it
Protip: If you're designing cylindrical hardware for 3d printing, put some flats on it so that you can use a wrench to tighten it down.
This HP pen has a funny approach to compliance labels. All the logos are on an easily removable sticker, and there's even a pull tab to encourage this. Seems like this defeats the purpose of putting them on in the first place?
These look neat: SMD clips for connecting to boards with castellated edges: https://www.electronicsweekly.com/news/products/connectors/surface-mount-connectors-hold-castellated-modules-2023-02/
The ram on this i7-1255U laptop is apparently faster than the ram in my Ryzen 9 7950X desktop:
Resin printer material exploration: printing with Amerilabs TGM-7, an extremely thin object (left, 8 gram) is extremely flexible and feels almost like paper, while a fully solid object (right, 150 gram) almost feels like it could be ceramic. This is my favorite resin so far.
Trying to make a profile for the Prima creator "crystal clear" resin on the SL1S. Prima lists the exposure speed as similar to their "tough" variant, but with 10x the viscosity. For some reason, it seems the exposure time needs to be much longer (>5x apparently).
Got a little help bringing up the CH55x reset boards; they're designed to put a WCH CH55-series processor into bootloader mode automatically, via either a button press or HID request.
I'd like to see what's happening in the host USB stack to give ~200us turnaround times between control transfers..
Eurocircuits has a neat online DRC setup; in this case, it didn't like my 0.3/0.6 vias, so it autocorrected them to 0.25/0.6.
Nice part: STM's USBDF01W5 includes both ESD diodes and an RC EMI filter in a SOT23 package. Very convenient that it has the same footprint as common ESD-only parts ;-) https://www.st.com/en/protections-and-emi-filters/usbdf.html
The @saleae Logic 2 software is really nice, but the remote control API didn't have an obvious way to just start a capture using the current settings. Fortunately you can do it yourself by using a GUI automation tool to poke at the right part of its guts: https://gist.github.com/cibomahto/3c47e7b06622aad732cbea4ac11900c4
Joined Nov 2022
