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SparkFun Multimeter Kit Project

 by rpcelectronics ¦  Fri Sep 27, 2013 8:44 pm ¦  Forum: Projects ¦  Topic: SparkFun Multimeter Kit Project ¦  Replies: 0 ¦  Views: 643

I built this little kit for fun, but it was pretty useless to me in the stock form. A little PCB trimming, some basic mechanical layout, some manual milling and whammo you got a simple home built multimeter. Even works!

ARM7 LM3S800?

 by rpcelectronics ¦  Tue Jul 23, 2013 7:44 pm ¦  Forum: SparkFun Product Questions ¦  Topic: ARM7 LM3S800? ¦  Replies: 0 ¦  Views: 338

I'm not sure this is the place to post this, but I am looking for any new ARM7 LM3S800 QFP package IC's that anyone might have in their stash and willing to part with. Six months ago these went from being abundantly available to non-existent. I am looking to get my hands on 3-5 of them for repair st...

Re: Function Generator Project Using Sparkfun Kits

 by rpcelectronics ¦  Fri Jul 19, 2013 11:33 am ¦  Forum: SparkFun Product Questions ¦  Topic: Function Generator Project Using Sparkfun Kits ¦  Replies: 3 ¦  Views: 939

lyndon wrote:Very nice. Is that closed-frame supply one of the mini power supplies from TDK-Lambda?
It's a Meanwell. I purchased it from Jameco.

Function Generator Project Using Sparkfun Kits

 by rpcelectronics ¦  Thu Jul 18, 2013 7:11 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Function Generator Project Using Sparkfun Kits ¦  Replies: 3 ¦  Views: 939

A while back I purchased the Sparkfun function generator kit and frequency counter kit. I had originally seen the Nuxie kits, but they became unavailable and shortly after Sparkfun filled the gap. I built them up, but never did much with them. Over the last year I have made it a side hobby to build ...

Re: Simple parts inventory program? (free or opensource)

 by rpcelectronics ¦  Wed Feb 01, 2012 5:13 pm ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: Simple parts inventory program? (free or opensource) ¦  Replies: 21 ¦  Views: 39970

I'm kind of late to the party on this, but you mentioned you use Mouser. Mouser is my best friend when it comes to keeping BOM's straight for each product. Will it track your inventory? No, but you can keep a nice online listing of BOM's for each project/product. I have invested a minimal amount of ...

Re: Recent Shipping Charges

 by rpcelectronics ¦  Fri Jan 27, 2012 6:03 pm ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: Recent Shipping Charges ¦  Replies: 4 ¦  Views: 2159

Paul, thanks for the explanation. That makes more sense now. I'll just have to make sure to work that into my future pricing projections.

Recent Shipping Charges

 by rpcelectronics ¦  Thu Jan 26, 2012 8:57 pm ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: Recent Shipping Charges ¦  Replies: 4 ¦  Views: 2159

I have been buying parts for my company from SparkFun for a long time. In general, I have been very happy with pricing, delivery time and pretty much any problem I have ever had has been dealt with quickly. However, I have to comment on the recent shipping charges. They are starting to get out of ha...

Re: Getting Started On A GPS Tracking Device

 by rpcelectronics ¦  Wed Apr 06, 2011 12:30 pm ¦  Forum: GPS ¦  Topic: Getting Started On A GPS Tracking Device ¦  Replies: 4 ¦  Views: 1352

If you want to go the amateur radio (ham) route, APRS is your friend. We just started to offer a brand new tracker called the RTrak-HAB (High Altitude Balloon). We made it as small and as light as possible for use as a high altitude payload, however, it could possibly work for what you are working o...

Re: Terminals on PCB layout? How to find how to add? EAGLE

 by rpcelectronics ¦  Thu Mar 17, 2011 5:26 pm ¦  Forum: PCB Design Questions ¦  Topic: Terminals on PCB layout? How to find how to add? EAGLE ¦  Replies: 10 ¦  Views: 7322

If you are using Eagle and have the default included libraries installed, look for the con-wago-508 library. If it's not showing, try adding the library from the schematic editor: Library>Use... and select the con-wago-508 library. Now click the Add button again and look for the library you just add...

Re: Please recommend an etching tank

 by rpcelectronics ¦  Mon Feb 14, 2011 12:41 pm ¦  Forum: PCB Design Questions ¦  Topic: Please recommend an etching tank ¦  Replies: 3 ¦  Views: 819

Back when I was etching boards all of the time at home, I used a fairly large Tupperware container for holding my FCA. I would nuke it a bit in the microwave to heat it BEFORE putting the board in the FCA. The heat and agitation really sped up the process to about 5-10 minutes, depending on the size...

Re: SparkFun Eagle Library Not Showing Up?

 by rpcelectronics ¦  Sat Nov 27, 2010 11:52 am ¦  Forum: PCB Design Questions ¦  Topic: SparkFun Eagle Library Not Showing Up? ¦  Replies: 3 ¦  Views: 2907

Once you are in the schematic editor, you also have the option of going to the "Library" menu on the menu bar and selecting "Use". A window will pop up, allowing you to navigate to where the library is stored ie. where you put it when you downloaded it. Then, simply double click the library file and...

Re: PCB Question.

 by rpcelectronics ¦  Sat Nov 20, 2010 2:28 pm ¦  Forum: PCB Design Questions ¦  Topic: PCB Question. ¦  Replies: 3 ¦  Views: 910

I'm not sure if you have considered this, but why not do away with the individual breakouts and just design a board for direct mounting of the sensors? Obviosuly you have some kind of integrated project in mind. Just design a single board around that and include the actual part footprints on the sin...

Re: Reliable Assembly House

 by rpcelectronics ¦  Sat Nov 13, 2010 9:16 pm ¦  Forum: PCB Design Questions ¦  Topic: Reliable Assembly House ¦  Replies: 4 ¦  Views: 1105

I am a former customer of Lil Brother as well. They have not gone away, they have just stopped taking in outside jobs. They explained to me that they had many internal projects that had been on hold while fullfilling outside orders. They decided that they just had to stop taking those in so they cou...

Re: Where to get a custom faceplate engraved

 by rpcelectronics ¦  Tue Nov 02, 2010 6:41 am ¦  Forum: PCB Design Questions ¦  Topic: Where to get a custom faceplate engraved ¦  Replies: 3 ¦  Views: 3056

If you are looking for a one or two off, contact Joe at Tucson Ent. I found him by doing a quote request through He has done several milling and engraving jobs for me. Great prices and great work.

Joe's Email:

Re: Custom arduino Design WITHOUT ISP header?

 by rpcelectronics ¦  Thu Oct 14, 2010 8:12 am ¦  Forum: PCB Design Questions ¦  Topic: Custom arduino Design WITHOUT ISP header? ¦  Replies: 6 ¦  Views: 1350

To make a snap-off portion of a PCB you would generally use slots and/or a row of closely spaced holes (with your ISP traces routed between the holes). I'm not sure how well BatchPCB would handle something like that - my experience with them is limited to plain rectangular boards. My suggestion wou...

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