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RE: gEDA-user: Spartan3 FT256 layout in PCB
- To: <geda-user@xxxxxxxx>
- Subject: RE: gEDA-user: Spartan3 FT256 layout in PCB
- From: "Robert Thorpe" <Robert.Thorpe@xxxxxxxxxxxx>
- Date: Sun, 13 Nov 2005 16:37:10 -0000
- Delivered-to: archiver@seul.org
- Delivered-to: geda-user-outgoing@seul.org
- Delivered-to: geda-user@seul.org
- Delivery-date: Sun, 13 Nov 2005 11:36:55 -0500
- Reply-to: geda-user@xxxxxxxx
- Sender: owner-geda-user@xxxxxxxx
- Thread-index: AcXnryp75W5IjNxUQ3aAhOJWUrVjJgAwPAgQ
- Thread-topic: gEDA-user: Spartan3 FT256 layout in PCB
> > I did use 20 0402 caps, but I
> > suspect that was unnecessary. They fit much better than 0603s so I
> > could get them closer, but they are hard to solder.
>
> I can see [from http://dlharmon.com/dspcard/dspcard-art.pdf]
> they really help for VCCAUX. I have worked my way down from 1206 to
> 0805 to 0603. At this point 805 are "easy" and 0603 are "OK"
> for my handwork/testing/repair. 0402 is still too scary.
>
0402 components are easy enough with practice. Things that help are:
* Using two fine tipped soldering irons on about 350-370 deg centigrade
* Not laying them out really tightly
* Not using 0402 components with solder pads on only one side, like 0402
wirewound inductors