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Re: GeoChron SD Card Format Problems

 by ohararp ¦  Sun Jun 06, 2010 11:00 am ¦  Forum: GPS ¦  Topic: GeoChron SD Card Format Problems ¦  Replies: 4 ¦  Views: 996

It's your crummy Transcend card that's the problem. I only recommend Sandisk in my gps loggers. Kingston is not much better.

Re: pressure sensor better than scp1000 for altimeter apps

 by ohararp ¦  Sun May 16, 2010 7:17 pm ¦  Forum: New Product Ideas ¦  Topic: pressure sensor better than scp1000 for altimeter apps ¦  Replies: 31 ¦  Views: 9893

I have samples and a board ready and I am about to implement the code for the MS5607-B from Intersema.

It's got a super simple I2C interface. Look for a simple serial output breakout board for this from me in the very near future!

Re: EM-406A problem.

 by ohararp ¦  Wed May 12, 2010 7:48 am ¦  Forum: GPS ¦  Topic: EM-406A problem. ¦  Replies: 15 ¦  Views: 3630

EM-406A's definitely have a level shifting quirkiness. They have an onboard regulator that runs to ~3.3V. You'll need to use some sort of up-level shifting if your uController is running at 5V.

Re: best regulator for 3.3V from lithium ion battery

 by ohararp ¦  Wed May 12, 2010 7:25 am ¦  Forum: SparkFun Product Questions ¦  Topic: best regulator for 3.3V from lithium ion battery ¦  Replies: 10 ¦  Views: 5140

TPS63000 series parts work fantastic and are very simple to layout. Your XBEE pro is going to be a power hog and this ic will let you run it no problem (1.2A output).

I am now using them in all of my gps logger apps.

http://www.ti.com/corp/docs/landing/tps63000/index.htm

Re: AM/FM/SW radio breakout board

 by ohararp ¦  Sun May 09, 2010 11:39 am ¦  Forum: New Product Ideas ¦  Topic: AM/FM/SW radio breakout board ¦  Replies: 3 ¦  Views: 3034

You mean like this one? http://store.curiousinventor.com/blog/FM_Radio_RDS_Vid/ I have one in my hands as we speak. Very cool stuff and Arduino compatible!

Re: Ordering/using flex PCB

 by ohararp ¦  Tue May 04, 2010 5:44 pm ¦  Forum: PCB Design Questions ¦  Topic: Ordering/using flex PCB ¦  Replies: 20 ¦  Views: 2586

Okay, overall I think this thread has been positive for a number of folks. To summarize I am always on the lookout for good board houses. Without question I can recommend PCB International as giving A+ and 5-Star Service. Based on this thread and some other e-mail exchanges they fully refunded my or...

Re: Ordering/using flex PCB

 by ohararp ¦  Sat May 01, 2010 10:38 am ¦  Forum: PCB Design Questions ¦  Topic: Ordering/using flex PCB ¦  Replies: 20 ¦  Views: 2586

Boards came in and they look great. They were well packaged. I have only assembled 1 of the boards thus far and it works great (see for more details http://www.picbasic.org/showthread.php/60190-IR-Shutter-Release-Nikon-D70)! It took about 15 days to get my boards, but the shipment was delayed from A...

Re: GPS Lap timer plus datalogger

 by ohararp ¦  Fri Apr 30, 2010 8:47 am ¦  Forum: GPS ¦  Topic: GPS Lap timer plus datalogger ¦  Replies: 9 ¦  Views: 6420

Very interesting project that is not to far off from what you want to do ... http://www.parallax.com/DAQPacAutomotiv ... fault.aspx

Re: Ordering/using flex PCB

 by ohararp ¦  Fri Apr 30, 2010 8:44 am ¦  Forum: PCB Design Questions ¦  Topic: Ordering/using flex PCB ¦  Replies: 20 ¦  Views: 2586

David, really I saw this thread and put my 2 cents in. I am always looking for a better deal on flex circuits. I got quotes from $575 (pcb int'l) all the way from $1600 (next best) to $3500. I'll be getting my pcb's from them today. They are doing a service very similar to gold phoenix. Nice thing i...

Re: Ordering/using flex PCB

 by ohararp ¦  Tue Apr 27, 2010 8:54 am ¦  Forum: PCB Design Questions ¦  Topic: Ordering/using flex PCB ¦  Replies: 20 ¦  Views: 2586

I just got a quote from these guys and they were by far the lowest of the 5-7 quotes I received. I am ordering some pcbs from them, but have not ordered flex circuits just yet, as we are waiting for final funding on that project. I'll try to remember to let you know how it goes. http://www.pcbintern...

Re: Austria Microsystems Magnetic Rotary Encoders

 by ohararp ¦  Tue Apr 27, 2010 8:51 am ¦  Forum: New Product Ideas ¦  Topic: Austria Microsystems Magnetic Rotary Encoders ¦  Replies: 12 ¦  Views: 9425

I have used the AS5040 in a couple of projects and they work great. See a crummy iphone image for details. Unfortunately they won't let me post the .pdf of the schematic.

Re: Who makes the SUP500F GPS unit

 by ohararp ¦  Tue Apr 20, 2010 9:39 am ¦  Forum: GPS ¦  Topic: Who makes the SUP500F GPS unit ¦  Replies: 7 ¦  Views: 1892

As you say there us alot of other value added to the services they provide. There bob's are hard to beat when design time is critical.

Ps I finally am using those TPS63001's. Great little chips for li-ion projects.

Re: Who makes the SUP500F GPS unit

 by ohararp ¦  Tue Apr 20, 2010 7:03 am ¦  Forum: GPS ¦  Topic: Who makes the SUP500F GPS unit ¦  Replies: 7 ¦  Views: 1892

Jim, trust me GPS modules from SFE are totally overpriced. Sometimes like a 4x markup.

Re: Where to find the GM862?

 by ohararp ¦  Sun Feb 28, 2010 9:27 pm ¦  Forum: Wireless/RF ¦  Topic: Where to find the GM862? ¦  Replies: 17 ¦  Views: 3951

John, thanks for the code. Nice trick on the ring and text option. I am looking to do a simple tracker for when I am on my motorcycle and my wife wants to know where I am. Your code will come in very handy!

Re: Where to find the GM862?

 by ohararp ¦  Sun Feb 28, 2010 9:39 am ¦  Forum: Wireless/RF ¦  Topic: Where to find the GM862? ¦  Replies: 17 ¦  Views: 3951

@john_meboune - I am looking at doing something very similar to you with sms. Any chance you could share some python code with us?

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