The required voltage IS going to be slightly higher, by the Vf of a Schottky diode. Unless you use the solder jumper to bypass it. Should be an extra .3 volts or so.
I'd also check the soldering on the cylinder type crystal in the middle of the board. That'll cause weird problems if it's loose, and I saw one during testing that had a lead not soldered at all. I'm anticipating delivery of the next batch in an hour or so. I'll be inspecting these a lot closer. I've still got the spare microscope in the assembly bench area, so I'll probably train the temp in what to look for and get a second set of eyes checking everything. She's done enough soldering to be able to recognize a bad joint, anyway. Scott k7ybz wrote: > > > > O.K. It is still sounding like a low voltage supply or intermittent > supply. The new board 'MAY' require a slightly higher minimum > voltage/current capability to operate that Scott did not expect. > > Larry > K7YBZ > > --- In [email protected] <mailto:tracker2%40yahoogroups.com>, > "kb4pzo" <kb4...@...> wrote: > > > > Larry, > > > > I give that I try tomorrow when I can line up another supply. For the > record I'm using the 9-volt DC adapter that Scott sells, it is rated for > 9V DC - 500mA. > > > > Thanks for your suggestion, > > Tim - KB4PZO > > > > Click to enlarge > > DC wall adapter with 2.1 mm center positive plug. > > > > --- In [email protected] <mailto:tracker2%40yahoogroups.com>, > "Rudy Benner" <benner@> wrote: > > > > > > Try a different (larger) power supply > > > > > > ----- Original Message ----- > > > From: kb4pzo > > > To: [email protected] <mailto:tracker2%40yahoogroups.com> > > > Sent: Monday, January 04, 2010 9:38 PM > > > Subject: [tracker2] Re: Can't config, OT2m serial port not responding > > > > > > > > > > > > Larry, > > > > > > Thanks for you suggestions. While the sequence looks like the power > up sequence is it slower by about 2x. Also it doesn't start until I > select "Connect" in otwincfg. I've also verified that the power is good. > In otwincfg when I check "Erase device and load new firmware" and then > select "Connect" nothing other than the periodic LED sequence I've > already described occurs, so no success trying to load new firmware. > > > > > > Thanks again > > > Tim - KB4PZO > > > > > > --- In [email protected] > <mailto:tracker2%40yahoogroups.com>, "k7ybz" <k7ybz@> wrote: > > > > > > > > The LEDs flashing like that is indicative of power being applied > then removed. That is the blinking order of the LEDs at boot up. You > might have an intermittent or just plan bad power connection. > > > > > > > > The rest of your procedures looks normal. However, you could also > try to upload firmware to the OT2 in case what is there has been > corrupted. You can see that option on the Tracker Connection window. > Just check the box and follow the instructions after selecting 'Connect". > > > > > > > > Larry > > > > K7YBZ > > > > > > > > --- In [email protected] > <mailto:tracker2%40yahoogroups.com>, "kb4pzo" <kb4pzo@> wrote: > > > > > > > > > > I just got my Tracker2 OT2m today and can't communicate with it > to set the configuration. Any suggestions would be greatly appreciated. > > > > > > > > > > I'm using a USB to Serial Port converter. I'm running MS Vista > Home Premium but have also tried running Otwincfg in XP emulation mode. > The results I've gotten are as follows: > > > > > > > > > > Tera Term > > > > > + Verified the USB-serial converter and null-modem serial cable > are working by successfully talking to a TT4 > > > > > + Tried various baud rates 4800 (also 2400, 9600, 19,200) with > no results, OT2m does not respond to several "Returns" > > > > > + One data point is that at 4800 when I turn off the Tracker I > see garbage characters, similar to what you see when the baud rate is > set incorrectly. > > > > > > > > > > otwincfg > > > > > + Select COM Port, press Connect, Turn on Tracker2 > > > > > + About every 13 seconds Tracker blinks LEDs in order (ACT, TX, > RX) in quick succession > > > > > + "Connect to tracker" window continues to be shown with > "Connect" button grey-ed out and message "Ready to connect, Please reset > tracker now." displayed > > > > > > > > > > 73, > > > > > Tim > > > > > KB4PZO > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ---------------------------------------------------------- > > > > > > > > > > > > No virus found in this incoming message. > > > Checked by AVG - www.avg.com > > > Version: 8.5.432 / Virus Database: 270.14.124/2599 - Release Date: > 01/04/10 08:24:00 > > > > > > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/tracker2/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/tracker2/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
