On Mon, 28 Jul 2008 19:39:29 -0400 (EDT), Jed Clear wrote: >On Mon, 28 Jul 2008, Jed Clear wrote: >> If you'd rather not mess around with getting power from pin 10, and aren't >> otherwise using your USB connector, it is a +5V source, with enough >> hampsters for the LVC, at least with no internal HDD. Cutting up a spare >> USB cable is probably the easiest way to get connected there. This also >> lets you use a standard 2x5 to DE-9 cable for COM2:. Of course if you're >> putting a 2x5 header on the LVC cable anyway, never mind. > >Forgot to add that I put DE-9 and USB connectors on my GPS 18 so I could >move it between different PCs. Moving it around is necessary since Garmin >updates firmware via MSWindows and my Soekris is MS free. > >-Jed
I have been doing a bit of work to make a small box that has a 15 pin connector to take either a 18-LVC or a 17-HVC as input and drives 2 RS232 outputs, one of which can "talk back". Power is obtained using a USB cable with a B socket on the box with only Gnd and +5 connected. The RS232 signals from the GPS are buffered with the neat little charge pump internal +/- supplied Max chips so no need to provide them with anything but 5V. To drive the HVC units a few extra components go on the board to pump the 5V to 12V but the cables terminate differently so that you won't kill a LVC unit if you have the 12V on board. The schematics are hand drawn atm and the prototype is not finished due POW but my 17 is on a 3m mast ready to clamp onto a gable end to get a good view of the sky. I'm keen to get it going but I have to make a quid to stay alive. More news when it's done. Anybody want to do the PCB layout? Probably single sided if we are not averse to a jumper or two.... Off-list replies (if you must) should go to the reply-to address. The sender address is a tarpit except for the list servers. Don't get stuck ;-)) R/ Rod/ /earth: write failed, file system is full cp: /earth/creatures: No space left on device _______________________________________________ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
