Yeah switchers don't like square waves....
On Thu, May 23, 2019 at 11:27 AM Tomas Kuchta <[email protected]> wrote: > Look for "pico PSU" for your 12V power supply needs. > > Like this one: > http://www.mini-box.com/picoPSU-160-XT > > Also available on Amazon ... Also from alternative sellers. > > That is how I power standard mini-itx systems since AsRock discontinued > their mini-itx DC line two years ago. > > With this power supply you can power up just about anything from car > battery. > > You could also just get true sinus inverter and power low power computer + > network switch + decent access point from ordinary power outlet. > > If you go the power inverter route - always get the true sinus type, > otherwise you will fry your switching PSUs in computer/laptop/etc. > > Tomas > > On Thu, May 23, 2019, 01:53 Chuck Hast <[email protected]> wrote: > > > Ahh, field day, yes I can see now exactly what you are looking for. And > yes > > some of your users will be just > > barely able to turn their computers on so it will need to be simple, I > can > > see that. I generally do tech stuff for > > field days (been a while) and one DX-pedition (Cocos Island Costa Rica) > but > > once I have it up and running > > I just keep it running, I do not get on the mic/key/keyboard... OK you > are > > going to use gpsd for disciplining. > > That will keep all the logs lined up, no one can fudge there. > > > > I am assuming that most of what the users will be grabbing are log files. > > The 12vdc POS devices are very > > handy for vehicular use. But they are getting harder and harder to find > > most have gone to 19vdc. BUT, you > > can find a boat load of 12vdc to 5-32 vdc boost switchers on ebay and > > amazon, most less than $20 for that > > service. I know it is one more box to drag but it will let you put those > > 19vdc POS boxes to use in the mobile... > > I have them in my work vehicle so I can just plug my laptops into them > and > > go. > > > > Though I have not used it, (that is on my list of todo's) Ben's > > recommendation of Slackware sounds like a > > good solution for just such things. Remember Murphy is and equal > > opportunity harasser, his momma > > walked the streets before he was born... You want to keep him off at a > > distance especially under that > > sort of environment. > > > > de kp4djt > > > > On Wed, May 22, 2019 at 10:35 PM Michael Barnes <[email protected]> > > wrote: > > > > > On Tue, May 21, 2019 at 5:35 PM Chuck Hast <[email protected]> wrote: > > > > > > > Michael, > > > > May I ask what amateur apps you are going to be using? gprsd and some > > > > others sound like something with > > > > aprs, or it could be with winlink, or a packet radio stack. I am > using > > > > MMDVM on a RPi and it writes a LOT to > > > > the little memory card, but it goes and goes. So even a very busy > aprs > > > > system will not see a lot of writing. I > > > > use the Samsung SSD's. I figure you are using one small POS or other > > > > devices, most are 19vdc but some are > > > > 12vdc (nice for vehicular usage) you indicated it used a 3" SATA > drive, > > > > there are a lot of SSD 2" drives that have > > > > a kit for putting them in a 3" space. As in any device that it > writing > > to > > > > memory make sure your 12v mains are > > > > reliable and will not drop out from under the computer. > > > > Call here is KP4DJT, Google it. > > > > > > > > > > > Hi Chuck, > > > > > > Getting ready for Field Day. We will have multiple operating positions > > all > > > using the N3FJP Field Day Logging Program. All the laptops will be > > > connected via wireless LAN. The LAN needs to provide basic network > stuff, > > > dhcp, ntp, etc. There will be no Internet connectivity, so the server > > will > > > have a USB GPS puck for time standard. I need a quick and dirty way of > > > grabbing files, so I was thinking of a basic web page users could > browse > > to > > > and click to download files. The users will mostly be barely computer > > > literate Windows users, so everything has to be pretty basic. The files > > > involved will be relatively small. > > > Yes, it is a small POS type device. I already got a Crucial 120GB SSD > and > > > bracket and it is installed. Just got the power cord today, will try to > > > fire it up later. > > > > > > Michael WA7SKG > > > Field Day call W7ORE > > > _______________________________________________ > > > PLUG mailing list > > > [email protected] > > > http://lists.pdxlinux.org/mailman/listinfo/plug > > > > > > > > > -- > > > > Chuck Hast -- KP4DJT -- > > I can do all things through Christ which strengtheneth me. > > Ph 4:13 KJV > > Todo lo puedo en Cristo que me fortalece. > > Fil 4:13 RVR1960 > > _______________________________________________ > > PLUG mailing list > > [email protected] > > http://lists.pdxlinux.org/mailman/listinfo/plug > > > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > -- Chuck Hast -- KP4DJT -- I can do all things through Christ which strengtheneth me. Ph 4:13 KJV Todo lo puedo en Cristo que me fortalece. Fil 4:13 RVR1960 _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
