On Tuesday, 10 May 2022 04:56:40 EDT Mark wrote: > On 5/9/22 05:38, andy pugh wrote: > > In the application you describe I would rather expect the USB to act > > as a battery replacement. Though USB is 5V and the reader heads use a > > 1.5V battery, so this might be a dangerous assumption. > > > > <finds caliper with missing battery cover> > > > > The scales can be powered through the data cable. This would be > > useful in many fixed installations. > > > > However, they do not like 5V. I experimented and things went wrong > > (no > > smoke, but all LCD elements turned on) at 2.1V. > > > > So, don't plug the USB into a USB socket without doing some careful > > tests with a current-limited variable power supply first. > > > > This probably isn't relevant to this query, but there are > > 3D-printable > > connector designs: https://www.thingiverse.com/thing:2477494 as an > > example. > > > > In a bit of a coincidence, CTC just spammed me with an email > > informing > > me that they have 50% off digital scales, code DS2022 > > > > https://www.ctctools.biz/digital-scales-dro/ > > No worries. The DRO puts out 1.5VDC through the Vpos and Vneg lines. > I'm not plugging the scale into a PC or anything like that. The scale > is plugged into the DRO-350. All I'm trying to do is cobble a cable to > go from the DRO to new scale which has the mini USB connector on it > rather than the old four strip connector in it. I'm figuring the mini > USB will probably be a much better connection than the old one could > ever be. > > Mark Thats debatable Mark. I have an older Nikon D-100 Coolpix camera with one of the many variations of the mini-usb socket, and discovered quite early in its history that If I wanted to get pix out of it with digikam, that it had to be standing on the face of its lens with the data cable hanging straight down off the edge of the desktop if I wanted a connection.
Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
