SCOTT, Here is a product that will work as a potting material. It's self leveling and flexible. You can find it in the shoe, craft, or pluming department of...
Hi all just assembled a kit for the Opentracker. Can anyone tell me how much current the 78M05 5v regulator can source? My GPS mouse takes 38mA and I am...
The current isn't your problem, it's the dissipated power. Let's assume the OT draws 15mA (that's on the high side) and you add 40mAQ for your GPS. The 7805...
Assuming you're running from 12 volts and not using more than about 100 mA, it should do just fine without modifications. The 78M05 is a TO-252 package and...
It is in the works, join the http://groups.yahoo.com/group/tracker2/ email list for more info. ... __________________________________________________ Do You...
It'll be another month or so before it's ready. I'll have some more beta test kits available later in the week. I'm in San Francisco for the long weekend and...
I am looking for a crystal, specs as follows: 16.043 MHz (calculated 16.04333333) +/- 20ppm stability (-20C - +70C) Load capacitance 20 pF Shunt capacitance...
Scott, The problem turned out to be the AM-COMM Clearspeech speaker I have been using in my truck for the past 5 years. I have never had any RFI problems with...
Does anyone have some figures on what voltages the Deluo GPSes will tolerate? I'm new to this tracker stuff and before I start buying stuff I'm looking for...
I have an OT1x Rev3 board. The TX audio is very low. This board does not match any of the documentation in either layout or schematic as far as I can tell, so...
Doesn't sound like an OT1 Rev3, more like an OT1x Rev3!! Your problem looks like a wrong resistor to ground (from the TX marked center, the pot). HI/LO is...
... Specs say 5 volts, +/- 5%. They used to say 5 to 9 volts, and I've heard that some people are still running them at 9 - but I won't promise that they'll...
... There are also low dropout regulators out there that operate with something like a 0.2V margin between the input and output voltages. -- Curt, WE7U. APRS...
At the time I did not see a need to challenge this but after this weekends balloon flight I have changed my mind a bit. I kept looking for the altitude report...
I recently bought a Garmin Foretrex 201 which works great with my TH-D7 and of course connects to a PC no problem. While my primary use for the 201 will be...
It'd be hard to squeeze it in as a configuration option in the OpenTracker, but maybe I could do that in the T2. Does the D700 not display altitude separately?...
... Thanks for the replies. All good ideas. I'm going to order one of the new Deluo SiRF-chipset pucks and see how if fares on 4.5 - 4.0 volts. This device is...
... Bummer. I found it was pretty easy in the T2 to just drop the altitude after it was extracted.. that way it doesn't clutter up the comment line and it's...
The old Digitravelers wouldn't start sending until they saw a signal, but you could get away with a positive one. Is that not true of the Foretrex? Some...
Have you tried hooking up a MAX232 type of chip to convert TTL/CMOS levels to true RS232? Try the MC1489 family (available from TI or Motorola), they can do...
The One Wire station works as advertised except the Outside Air Temp (OAT) reading n a sunny day is incorrect. The temp sensor is housed inside the unit. On...
The One Wire station works as advertised except the Outside Air Temp (OAT) reading n a sunny day is incorrect. The temp sensor is housed inside the unit. On...
Thanks Scott & David for the info. I found that the ForeTrex would start sending data if its input (pin 3) was anything other than zero volts. An easy fix was...
As I recall the (original) 1488/89 needed bipolar supplies. The Max232 could run off a single low voltage supply because it has two internal charge pumps to...
You might want to look at A232DB on http://www.compsys1.com/workbench/On_top_of_the_Bench/Max233_Adapter/max233_adapter.html I have one of these for another...
I've posted a new version of the OT1x addendum that covers rev 3, plus assembly instructions for the kit version. I've also restructured the website a bit,...
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