Search found 230 matches

by sylvie369
Thu Jan 13, 2011 5:44 pm
Forum: Sparkfun Promotions and Competitions
Topic: That was kinda fun!
Replies: 5
Views: 4002

Re: That was kinda fun!

I was one of the frustrated non-complainers last year, spending about an hour trying, getting close twice, but no cigar. This year I figured I'd just take my $30 credit, on the assumption that there'd be no way to get all the question pages to load, let alone my answers as well. I managed to get pre...
by sylvie369
Sat Aug 21, 2010 10:18 am
Forum: Wireless/RF
Topic: using an xbee to read an analog signal remotely from an ardu
Replies: 8
Views: 7176

Re: using an xbee to read an analog signal remotely from an ardu

This is the page that explained to me how to set up the ADC stuff:

http://www.faludi.com/2006/12/03/xbee-d ... -with-adc/

I agree that the Series 1/2.5 thing is unnecessarily confusing.

Also yes, I've simply run a jumper from Vcc to the Vref pin, and it works fine.
by sylvie369
Thu Aug 05, 2010 6:54 am
Forum: GPS
Topic: Simple GPS
Replies: 5
Views: 1211

Re: Simple GPS

Coyote's advice is sound. I second it. Hooking up a GPS module and displaying the data received from the module is not that difficult a task. I had that going during the first year that I was messing with these devices. Displaying total distance traveled and total ascent/descent will be more challen...
by sylvie369
Mon Aug 02, 2010 1:12 am
Forum: GPS
Topic: SUP500F Troubleshooting Help
Replies: 15
Views: 4493

Re: SUP500F Troubleshooting Help

Like Nate said, it has great features if you get it working. I'm using it in a HP rocket tracking system, so hopefully it will work under high acceleration. More importantly, hopefully it will reacquire lock quickly after losing it in your boost phase. I think that it's expected that you'll lose sa...
by sylvie369
Fri Jul 23, 2010 4:44 am
Forum: New Product Ideas
Topic: 10-pin 2 mm SMD XBee sockets
Replies: 4
Views: 973

Re: 10-pin 2 mm SMD XBee sockets

I'm looking for where I can get some 900 MHz XBees for free.

I know Sparkfun stocks the kind that cost money, but do you have the free kind too?

(crosses fingers)
by sylvie369
Fri Jul 23, 2010 4:40 am
Forum: SparkFun Product Questions
Topic: SUP500F or Micro-Mini GPS
Replies: 1
Views: 221

Re: SUP500F or Micro-Mini GPS

Have you read the "SUP500F troubleshooting" thread over in the GPS forum? I suggest you do so.
by sylvie369
Fri Jul 23, 2010 4:40 am
Forum: Wireless/RF
Topic: RF Bridge for data recording
Replies: 3
Views: 609

Re: RF Bridge for data recording

You will be FAR happier with the XBee modules. A pair of Series 1 modules will fill the bill perfectly.
by sylvie369
Mon Jul 19, 2010 2:50 pm
Forum: SparkFun Product Questions
Topic: Capacitance Meter Kit - Needs a kick start, dim display, etc
Replies: 5
Views: 618

Re: Capacitance Meter Kit - Needs a kick start, dim display, etc

I built one shortly after they came out, and it worked without that "kick start".

However, the display is pretty dim. Some of the gurus here might be able to figure out how to make that better, but for now, I think it's just how the thing is.
by sylvie369
Wed Jul 14, 2010 7:55 pm
Forum: GPS
Topic: High altitude high velocity gps?
Replies: 18
Views: 3982

Re: High altitude high velocity gps?

It's possible. BTW, I'm currently using the 2.4 GHz XBees, not the 900 MHz ones. I also don't have any processor in the loop, so the XBee is in transmit anytime it receives data from the GPS (that is, once per second), so it's transmitting quite a bit. It does work properly though on a protoboard, w...
by sylvie369
Tue Jul 13, 2010 8:55 am
Forum: GPS
Topic: EM406A not locking at all
Replies: 6
Views: 1432

Re: EM406A not locking at all

I have, however, recently found that a GPS circuit of mine that works fine on a breadboard takes forever to get satellite lock, and loses the lock easily, when mounted on a pc board (of my own design). This is a long shot but that might be due to the ground pour on the PCB. Except I have seen the E...
by sylvie369
Tue Jul 06, 2010 11:46 am
Forum: GPS
Topic: EM406A not locking at all
Replies: 6
Views: 1432

Re: EM406A not locking at all

Where is the module located? Does it have a good view of the sky? Does the "164310.088" reflect the current time? Does it eventually change as time passes? If you're getting those data, I'm pretty confident there's nothing wrong with your communications settings or the wiring of power, ground, and d...
by sylvie369
Tue Jun 29, 2010 2:31 pm
Forum: GPS
Topic: High altitude high velocity gps?
Replies: 18
Views: 3982

Re: High altitude high velocity gps?

I did have a problem just like this. I was using the ultra compact antenna for the Lassen gps. I wanted to mount this right on the pcb (on specified ground plane). In this config I t took forever to get lock and once lock was aquired it was lost with little movement. To resolve the issue I switched...
by sylvie369
Tue Jun 29, 2010 5:24 am
Forum: GPS
Topic: High altitude high velocity gps?
Replies: 18
Views: 3982

Re: High altitude high velocity gps?

For accel I have used the ADXL78 and MMA2301. I find the ADXL to be most reliable. I have attached a pic of the unit. The gps and radio are on the backside of the board. For rocket flights I use a yagi antenna. Beautiful. You don't have any problems with GPS lock when it's mounted on the board with...
by sylvie369
Mon Jun 28, 2010 1:45 pm
Forum: SparkFun Product Questions
Topic: Arduino based Rocket Telemetry System
Replies: 6
Views: 3747

Re: Arduino based Rocket Telemetry System

I think the xbee 900's will be out of range in a fraction of a second. I have 900 pros with rubber duckies and i get approx 500' near buildings. Maybe on on-board logger? No, they'll work fine. I've been using the 2.4 GHz XBee Pro modules, wire antenna, both onboard and for the ground station, and ...
by sylvie369
Mon Jun 28, 2010 1:39 pm
Forum: GPS
Topic: High altitude high velocity gps?
Replies: 18
Views: 3982

Re: High altitude high velocity gps?

The easiest way to send altitude data is to use a Perfectflite MAWD altimeter, turn on the telemetry function (in software), and connect the TX and ground wires from the data output connector to an XBee radio's Din and ground pins. As soon as the altimeter goes into flight mode (at 160 feet) it will...