[time-nuts] Fwd: Atmega?

[paul swed]

Thanks I did see the post.
But now numbers of opinions are popping up on the thread and that tends to
make things confusing.
Why use the 28 pin chip? My answer is this. Anything I ever do has other
stuff associated with it. So the fact that I can easily solder to the chip
and then add all of the other stuff is attractive. An example is the
parallax SXB chip. Could be programmed in the board and that made it easy
to load and re-load software at about 30 seconds cycle time. Great to
figure out and debug software.
I like the $3.71 ebay board with the atmega chip. But then evidently that
was not the correct chip to do the gpsdo. Darn liked the cost, size, and
form.
Regards
Paul


On Thu, Feb 13, 2014 at 1:09 PM, Chris Albertson
<albertson.chris at gmail.com>wrote:

> ---------- Forwarded message ----------
> From: Chris Albertson <albertson.chris at gmail.com>
> Date: Thu, Feb 13, 2014 at 8:58 AM
> Subject: Re: Atmega?
>
> I posted this off list, but I'm reposting on the list with mnor edits.  I
> think there might be people looking to buy stuff.  If so here are some
> links
>
> The real Arduinos are made in Italy, not China.  Nothing wrong with the
> lower priced clones BUT you need to understand what you are getting and the
> differences.   If you just want to  "load and go" and not have to make
> changes for pin-numbers, different resistor values and other little things
> then by the real product.  If you don't have the cash, buy a clone that
> claims to be an "Uno" (Italian for one) and you need the ATmega328P chip.
>
> This is a good place to buy a real Arduino
> http://www.adafruit.com/products/50
> and then one of these:
> http://www.adafruit.com/products/51
>
> However ebay #300948763268 looks like a clone of a late model Uno  (as it
> has the two extra pins the new Unos have) for 1/2 the normal price.
>
> But DO get the "proto-shield" board.  The reason is the hole spacing on the
> Arduiino Uno is NOT standard and some 0.1 headers are not on a standard 0.1
> inch grid.  You can use perf-board but you will be drilling a extra holes
> between existing holds.  You see all those 0.1 headers and think standard
> pegboard can work but  notice two of the connects are 0.15 apart which
> places one of them off the normal grid.
>
> eBay has the PCBs for this too see #310670122595.
>
> The tiny ones like this (eBay #221326355393) are attractive but not if the
> goal is "load and go" with no changes.
>
>
>
>
>
> On Thu, Feb 13, 2014 at 8:35 AM, paul swed <paulswedb at gmail.com> wrote:
>
> > So just that board from ebay would allow me to download Lars code and run
> > it.
> > As I say so much information's quite rare and I want to buy a few of
> these.
> > When I like a processor well enough as in the case of the Parallax SXB I
> > pickup oh say 50. I treat them as disposable logic. So do not want to
> order
> > the wrong thing. Though to start would grab 3-4.
> >
>
>
>
> --
>
> Chris Albertson
> Redondo Beach, California
>
>
>
> --
>
> Chris Albertson
> Redondo Beach, California
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