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Re: How low can you go?

 by ohararp ¦  Mon Oct 04, 2010 6:30 pm ¦  Forum: PCB Design Questions ¦  Topic: How low can you go? ¦  Replies: 11 ¦  Views: 1672

A part that tight will more than likely require vias. I'd go with boards made overseas and use a stencil with a hotplate to assemble everything at your place. There are tons of tutorials out there on this process. I also make/sell stencils, but am also more than happy to contribute to help others ge...

Re: Telit GE865 (Can't SMS)

 by ohararp ¦  Tue Sep 28, 2010 5:42 pm ¦  Forum: Wireless/RF ¦  Topic: Telit GE865 (Can't SMS) ¦  Replies: 7 ¦  Views: 1559

Don, I posted my code in the blog entry I did on "Twitter Tracker" - Or you can just download the code at '******************************************************************************* SEND_TEXT: IDX_SEND...

Re: Cellular modules and prepaid phones

 by ohararp ¦  Sat Sep 18, 2010 5:51 am ¦  Forum: Wireless/RF ¦  Topic: Cellular modules and prepaid phones ¦  Replies: 19 ¦  Views: 6573

Buy a tracker...phooey. I designed my own. Check for more details. Using the GM862 and twitter with a T-Mobile Sim makes it pretty easy.

Re: Streaming GPS data over a network connection

 by ohararp ¦  Tue Sep 07, 2010 6:10 am ¦  Forum: SparkFun Product Questions ¦  Topic: Streaming GPS data over a network connection ¦  Replies: 7 ¦  Views: 963

Why not use xbee "end devices" to a single receiver that was tied to a wired ethernet port or computer?

Re: Advice for LiPo Charge & Boost Circuit

 by ohararp ¦  Mon Sep 06, 2010 1:30 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Advice for LiPo Charge & Boost Circuit ¦  Replies: 5 ¦  Views: 898

cccool3, I'd take a look at microchips MCP1252 chips. You can get them in in 3.3V,5V and adj formats. I use this in my dataloggers all the time. You are limited to 120mA but they should work fine for this app. Otherwise I recommend the TPS6300X units.

Re: Where to find the GM862?

 by ohararp ¦  Sun Sep 05, 2010 8:27 am ¦  Forum: Wireless/RF ¦  Topic: Where to find the GM862? ¦  Replies: 17 ¦  Views: 3951

Just thought I would share my version of a gps tracker using the GM862. Thanks for all your help!


Re: Rapid Prototyping enclosures?

 by ohararp ¦  Sat Sep 04, 2010 9:23 am ¦  Forum: New Product Ideas ¦  Topic: Rapid Prototyping enclosures? ¦  Replies: 21 ¦  Views: 11682

I finally got around to cutting some cases for another project using the laser, t-slots with 4-40 hardware, and 1/4" acrylic. Overall its much sturdier than I thought it would be!


Re: Telit GE865 (Can't SMS)

 by ohararp ¦  Fri Sep 03, 2010 7:12 am ¦  Forum: Wireless/RF ¦  Topic: Telit GE865 (Can't SMS) ¦  Replies: 7 ¦  Views: 1559

Keith, did you get this figured out? I have some code available for the GM862. Big thing was setting the right AT# BND mode and getting the carrier's phone number setting right.

Re: MAX1555 replacement?

 by ohararp ¦  Fri Sep 03, 2010 7:10 am ¦  Forum: SparkFun Product Questions ¦  Topic: MAX1555 replacement? ¦  Replies: 8 ¦  Views: 1123

Re: Solder Paste, is it too Old?

 by ohararp ¦  Thu Aug 26, 2010 9:01 am ¦  Forum: PCB Design Questions ¦  Topic: Solder Paste, is it too Old? ¦  Replies: 3 ¦  Views: 770

I have some 2 year old paste here that stays at about 70F. Keep it stirred and you should be fine.

Re: Cellular modules and prepaid phones

 by ohararp ¦  Thu Aug 26, 2010 8:57 am ¦  Forum: Wireless/RF ¦  Topic: Cellular modules and prepaid phones ¦  Replies: 19 ¦  Views: 6573

swarga, I have been using t-mobile with good success. I am only using their $15 unlimited text option. I'd be interested to learn more about your database and how you are storing location information if you don't mind sharing.

Re: SanDisk iNAND breakout board

 by ohararp ¦  Sun Aug 22, 2010 8:47 am ¦  Forum: New Product Ideas ¦  Topic: SanDisk iNAND breakout board ¦  Replies: 2 ¦  Views: 730

Tim, I am definitely interested to see if you can even get your hands on some of these. Keep us posted!

Re: Still cannot send sms message in text mode...

 by ohararp ¦  Sun Aug 22, 2010 8:42 am ¦  Forum: Wireless/RF ¦  Topic: Still cannot send sms message in text mode... ¦  Replies: 4 ¦  Views: 1034

I use just 4 simple commands to get a text message out:


You should use this terminal program to help you get things up and running. ...

Re: Rapid Prototyping enclosures?

 by ohararp ¦  Fri Jul 09, 2010 7:37 am ¦  Forum: New Product Ideas ¦  Topic: Rapid Prototyping enclosures? ¦  Replies: 21 ¦  Views: 11682

So I actually had some cases made by envision plastics and they turned out pretty well. They used a U-U design that snaps together very nicely. Pricing is not really hobby friendly but great for small production runs that I do.


Re: PCB CNC machine

 by ohararp ¦  Thu Jun 10, 2010 9:01 am ¦  Forum: BatchPCB ¦  Topic: PCB CNC machine ¦  Replies: 76 ¦  Views: 81525

Can I ask what bit you were using for your stainless stencil? Any other setup configuration for this that you could post would be appreciated!

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