If anyone can find some 0.05” press fit headers, that’d be perfect. Smaller versions of these: https://microcontrollershop.com/product_info.php?products_id=6552&osCsid=anp1cig2mlkv4j9083l85tpv41 <https://microcontrollershop.com/product_info.php?products_id=6552&osCsid=anp1cig2mlkv4j9083l85tpv41>
I heard Digikey stocks similar header pins, but I haven’t been able to find them yet. -Bryan > On Jan 19, 2021, at 1:01 PM, Bdale Garbee <[email protected]> wrote: > > Chris Brown <[email protected]> writes: > >> I would be interested in connecting with USB. Can you please ask Keith to >> provide the details? > > Keith and I just talked this through. Conceptually, it's easy. In > practice, it's really fiddly, because what you have to play with are 3 > small holes in the board on 0.050 inch centers. > > I'm going to CC our mailing list on this reply so this becomes more > general knowledge. The question for those seeing this for the first > time, is how to use USB to configure a TeleMini v3.0 board? > > Leaving the micro USB connector off is one of the ways we made TeleMini > fit in an 18mm tube. But the main system on chip has USB available > still, so when he laid out the board, Keith brought the required pins > out, thinking it might be helpful in debugging or something, and our > software should know what to do if it sees a TeleMini show up on USB. > > On one edge of the board (see attached photo), there are 6 holes in a > row, one of which has a square pad, though you really have to squint at > it to see which pad that is. It's the third pad in from one end, and > has 2 round holes on one side and 3 on the other. The side with two is > what you care about... they are the USB plus and minus data lines. 3 > connections will do it, GND / D+ / D-. > > To actually connect to these holes, the quickest hack is probably to > take some existing USB A to mini or micro B cable, cut the B connector > off, then carefully strip the outer jacket, strip the conductors, twist > and tin their stranded leads, and just stick them into the appropriate > holes. Note that the usual color code for such cables is black for > ground, red for 5V (avoid like the plague getting that near our > boards!), green and white for the data lines. On the cables we buy for > TeleDongle, et al, green is D+ and white is D-, but sadly not everyone > seems to get that right who sells cheap cables. I've never seen anyone > mess up the red and black wires. Fortunately, if you get the data lines > reversed, it won't hurt anything, it just won't work. > > It's going to be a bit of a challenge to keep everything making contact > long enough to talk to the board. You might consider finding some > 50-mil pitch header pins to solder the wires to so you have a single > thing you're putting in and out of the holes. Or maybe some micro > grabbers on each wire? If you come up with some great solution, please > let me know. > > In any case, once you have the USB port wired up, with a battery and > power switch hooked up to the board it should show up as a USB device on > your computer and you should be able to use altosui to configure it just > like any of our other products. > > Have fun! > > Regards, > > Bdale > > <telemini-v3.0-top.pdf>_______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum
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