Hi Is it possible to operate OpenTracker at 3 volts? I took a quick look at the 68HC908KX8 data sheet and it says it will run at 16MHz @ 2.7v. I'm not familiar...
Bus clock is 1/4 external clock, so at 3 volts you only get 4 MHz max. You might be able to redo the timing in the FSK loop to match, but I'm not sure how...
I am into model rocketry and I would like to put a tracker/GPS payload into one to record maximum altitude. A pressure sensor might work as a telemetry input....
The Deluo GPS receivers I've got (made by Polstar) weigh 17 grams and measure 32x32x9 mm, without the plastic case. They're only rated to 4 Gs, not sure...
why woudl you want it to run on 3V? Maybe to use plug and play AA type batteries (1.5v x2) I guess you could sacrifice battery life a bit by using a voltage ...
I was thinking of trying a surface mount version with support for 1.5V operation, myself. I've got some DC-DC converter chips sitting here, tiny little SOT23...
... I had wanted to use it in conjuction with a micro power controller -TI's MSP430 running on 1.8-3.6 volts and power up the higher power chip running Open...
It would probably be possible to port the code to a 3 volt HCS08 without too much trouble. I'm sure it could be done in a weekend, I just don't have a lot of...
I'm still working on this new, big OT board layout. It's currently 3.9" by 2.7". I'm undecided on what to do about a mic input. If I was going to make it a...
Hi Scott, I'd be keen on the protoyping area! 73 de Geoff ZL3GA ... -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 /...
... How about strips of three to five holes connected rather than trying to stuff three components and seven wires into each hole? Kinda like a rat shack...
I don't care for the RJ connectors... Too often the wire breaks inside the connector, the tab breaks off, dirt gets on the contacts... In my experience...
... I'm with you, but they're really cheap so a lot of people use them. I have trouble with them not making contact and with the little tangs getting broken...
I just found a possible good substitute voltage regulator if you are wanting to run a GPS Sensor off the OpenTracker onboard voltage regulator. It had the same...
I've tried a few alternatives, but I think the problem is that with any linear regulator you're still going to be dissipating a lot of heat as you drop the...
Hi Scott and all, I'm still having no luck using ADC2 as another temperature input. Has anyone actually done this with an LM335? Tried an LM335 and 6k8 pullup...
I took the long (~3m), shielded lead out of the equation and things look a little better. The temp (using a 6k8 resistor) is very close to what it should be,...
... How low do you need? I've had the 335 work just fine below -70C. I'll also be testing the LM19 for improved resolution. It's not as linear as the 335,...
... It's reporting properly, but you can't read the voltage? What's the impedance of your voltmeter? I'm not aware of any functional difference between the...
20k/V analogue admittedly but the point is it works OK on the other temp sensor on ADC0... I'll try it with a DMM tonight. Cheers, Geoff ... -- No virus found...
2.9V. Is the ADC2 pin kept low except when taking a sample? Cheers, Geoff ... -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version:...
Options For Deluo GPS Sensor. The Deluo GPS uses about 120ma and the onboard regulator is only good for 100ma. I think I am just going to jumper pin 9-10 and...
... payload ... a ... pressure ... The Deluo GPS hooked through the opentrack to an Alinco is pretty small. I used that setup to 26,000 in a rocket at mach...
I was wondering how high people have flown a Deluo GPS in say a balloon or other means. I need to go to 100,000 and was wondering what my options where. I have...
... Have you seen this web page? It's just about the only page I have come across that has detailed information on GPS models and firmware versions found...
Hi all, The last of the Revision 2b boards are about gone, and I'll be shipping Revision 3 boards soon. If you've bought an assembled unit recently you've ...
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