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Re: Parallax releases Propeller 1 design to GPL 3.0

 by Purple Squirrel ¦  Fri Aug 08, 2014 1:57 pm ¦  Forum: FPGA's ¦  Topic: Parallax releases Propeller 1 design to GPL 3.0 ¦  Replies: 1 ¦  Views: 1969

Im not a huge Altera fan but Im always happy when there is another programmable logic option for people.

Re: help with LD1117V33

 by Purple Squirrel ¦  Thu Jul 24, 2014 7:12 am ¦  Forum: SparkFun Product Questions ¦  Topic: help with LD1117V33 ¦  Replies: 10 ¦  Views: 791

To elaborate a bit more on what waltr said, the info you need is never on the first page and is usually the smaller print. In this case the devil really is in the details :twisted:

Re: take the job or not ?

 by Purple Squirrel ¦  Fri Jul 18, 2014 10:53 am ¦  Forum: Forum ¦  Topic: take the job or not ? ¦  Replies: 4 ¦  Views: 1292

Those are great point to consider and one more I would like to toss in (mind you this is coming from a hardware guy rapidly approaching 20 years in the biz)... KEEP LEARNING. I cannot emphasize that enough. I have seen many engineers work themselves out of a job because they didnt make the effort to...

Re: Work Around...Xilinx ISE and Windows 8

 by Purple Squirrel ¦  Thu Jul 17, 2014 11:47 am ¦  Forum: FPGA's ¦  Topic: Work Around...Xilinx ISE and Windows 8 ¦  Replies: 2 ¦  Views: 5497

PDF added.

Thanks for enabling the PDF downloads phalanx

Re: Intrinsically Safe Design

 by Purple Squirrel ¦  Wed Jul 16, 2014 3:11 pm ¦  Forum: PCB Design Questions ¦  Topic: Intrinsically Safe Design ¦  Replies: 1 ¦  Views: 838

IEC 60079-11 is pretty much the standard that everyone uses. For PCB design the intrinsic safety portion deals with sparks...or the energy that generates them and the required spacing to stop a spark from forming. If you are still having some trouble with this, post a specific question that you have...

Work Around...Xilinx ISE and Windows 8

 by Purple Squirrel ¦  Wed Jul 16, 2014 2:14 pm ¦  Forum: FPGA's ¦  Topic: Work Around...Xilinx ISE and Windows 8 ¦  Replies: 2 ¦  Views: 5497

For those of you who already have, are going to, or are going to against your will, migrate to a Windows 8 machine and intend on using the Xilinx ISE tools you are likely to have an issue run the software. At least one if not two of the .exe files you need (either _pn.exe or _xlcm.exe). I ran into t...

Re: Ground and +5V Planes?

 by Purple Squirrel ¦  Tue Jul 15, 2014 7:58 am ¦  Forum: PCB Design Questions ¦  Topic: Ground and +5V Planes? ¦  Replies: 2 ¦  Views: 1055

Get in to the habit of using a single ground plane now so as your designs become more complex (i.e. more power rails, faster signals, etc) you will be better able to avoid issues that come with multilayer ground planes.

If you have questions shoot me a PM.

Re: Altium Libraries

 by Purple Squirrel ¦  Tue Jul 15, 2014 7:54 am ¦  Forum: PCB Design Questions ¦  Topic: Altium Libraries ¦  Replies: 4 ¦  Views: 5021

Im using Altium and the tool does come with some libraries already installed. Granted two are generic and the rest are peripherals for FPGAs but the Altium website does have a good selection of parts libraries. Also you should check Git-Hub as well as there are some decent libraries there.

Re: A/D implementation on FPGA

 by Purple Squirrel ¦  Mon Jul 14, 2014 7:20 pm ¦  Forum: FPGA's ¦  Topic: A/D implementation on FPGA ¦  Replies: 2 ¦  Views: 2462

TrollHammer As sgrace mentioned the 7 series of Xilinx parts has an A/D feature that you can implement using the XADC core. All you need outside the device is the recommended filter of two resistors and one cap per XADC input. XIlinx has some appnotes about this but you should read app note UG480 fi...

Nivis Open Sources their ISA100.11a and WirelessHART stacks

 by Purple Squirrel ¦  Mon Jul 14, 2014 7:17 pm ¦  Forum: Wireless/RF ¦  Topic: Nivis Open Sources their ISA100.11a and WirelessHART stacks ¦  Replies: 0 ¦  Views: 388

I saw that Nivis has made both its ISA100.11a and WirelessHART software source code freely available under the GPL-3.0 license and I thought this would be useful for many here on the forum. You can find out more here:

Purple Squirrel

Re: Ground paths and less cluttered ground plane

 by Purple Squirrel ¦  Mon Jul 14, 2014 1:53 pm ¦  Forum: PCB Design Questions ¦  Topic: Ground paths and less cluttered ground plane ¦  Replies: 3 ¦  Views: 1222

1st issue: each board house is different in how they process/manufacture PCBs. That is why they have a set of manufacturing guidelines they will happily give you. However if you insist on them making your boards the way you laid them out they will most likely do so but tell you they are not going to...