[Coco] CoCo Altera DE1 interface

Thu Mar 5 19:49:30 EST 2015

The chips just arrived. Oh dammit they are ALVC, not LVC. They are too
small (and don`t handle 5V). I just threw away 6 bucks. Damn it! :)

Oh great SMD gurus: Is *this* the right chip?

http://www.aliexpress.com/item/electronics-SN74LVC164245DLR-74LVC164245-LVC164245-original-spot-genuine-please-rest-assured-purchase/32237900441.html

Thank for the help,

On Sat, Jan 17, 2015 at 1:32 PM, Gene Heskett <gheskett at wdtv.com> wrote:

> On Saturday 17 January 2015 10:15:06 Matthew Stock did opine
> And Gene did reply:
> > Kip,
> >
> > Fortunately, I just meant that where I once was able to focus and get
> > precision by just putting my eye 1/2" away from the surface I now need
> > to be 8" away and/or use a loupe to do the same job.  :-)  It makes
> > SMD harder, but it's actually easier than you might think if you
> > choose reasonable devices.  Sorry for the misunderstanding.
>
> I solved that problem 30 years ago. I bought one of those illuminating
> fluorescent lamps, one with an 8" circline lamp wrapped around a 6"
> magnifying lens, with power just low enough that I have working room under
> it if I use the smaller solder sucker. First I bought one on the tv
> station's nickel for use there and found it so handy I bought myself one.
> They were about $75 when I bought them, no clue what Staples, who has them
> yet, wants today.  But for a trifocal wearing old geezer like me, they are
> the best solution I've found.
>
> > The main two advantages of the chip I chose is high density and the
> > ability to interface with 3.3v logic.  The LS244/245 set are fine, but
> > you would need 5-6 chips, and you would still only be able to work at
> > 5v.  It all depends on what problem you want to solve.  I wanted to
> > hook it up safely to newer microcontrollers and FPGAs, which
> > necessitated at least having 3.3v support.
> >
> > Like everything else, SMT soldering requires practice.  Also, a nice
> > pair of tweezers.
>
> And steadier hands Matt.  The years accumulated are starting to make me
> shaky, darn it. 1/16" or so, but on SMD stuff its easy to get a bridge
> even w/o the shakes.
>
> > Matt
> >
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page <http://geneslinuxbox.net:6309/gene>
> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>