All of the PICs I ordered came in on Friday (Mouser ships FAST!) so it's a
matter of programming them and getting them out this week. Just an FYI
guys, I'm leaving for southern Arizona for three weeks for work. If I don't
get them out this week I will do my very best to get them out while I'm on
Here we go again!
The TS272ACN has just gone 'non-stocked' at Mouser. Will the TS272CN
degrade the performance? It looks like the difference between the two
is the TS272CN has a higher input offset voltage.
Ed
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The TS272CN is an acceptable substitute for the TS272ACN in the
PICTIC II but as noted has a higher input offset voltage. This
can be compensated for in the second stage by adjustment of
the offset trimmer. I selected premium parts for temperature
stability in the application. Sorry the
Got the package today from Mouser with everything there. Now to send the PIC
chip to Bob Darlington for programming. And get the board from Stanley Reynolds.
Best,
Dick Moore
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I see that the 74AC175 in the Mouser project has now morphed to a
75AC*T*175. Was that substitution intentional? I think it should be
okay, just wanted to check. (What? Paranoid? Who said that?!)
Ed
Richard H McCorkle wrote:
Time-Nuts,
When the PICTIC was first developed a number of
Hi
There's been a thread on the 175. It's both the wrong logic level and package.
The good news is that you can buy it. The other parts are obsolete.
Bob
Sent from my iPhone
On Jul 10, 2010, at 4:56 PM, Ed Palmer ed_pal...@sasktel.net wrote:
I see that the 74AC175 in the Mouser project has
Hi
Ok, I've set up a new project at Mouser for the PICTIC II parts. Assuming the
magic works it's at:
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=8736DCEE10
You can also go to their EZ Buy page and enter code 8736DCEE10 to get to the
project.
There are a few special
I was thinking of using a 74F175 not as fast uses more power but I have it.
Stanley
snip
7) The 74AC175 is un-obtanium in a PDIP package the project shows a 74ACT SOIC
version, you'll have to kludge it on to the board Logic levels on the clock may
impact accuracy (but probably won't).
snip
Hi
The 74F175 is in stock at Mouser. I'll let Rich decide if it's good enough.
Bob
Sent from my iPhone
On Jul 9, 2010, at 5:16 PM, Stanley Reynolds stanley_reyno...@yahoo.com wrote:
I was thinking of using a 74F175 not as fast uses more power but I have it.
Stanley
snip
7) The
Time-Nuts,
When the PICTIC was first developed a number of front-end designs were
evaluated with the 74AC175 providing the best characteristics, size,
and speed in a DIP format. When the PICTIC was released in 2008 the
74AC175PC was in full production, but by the time the PICTIC II with
the diode
Richard,
For the original circuit board, what about the 74AC175 SOIC soldered to
an SOIC to DIP adapter? These adapters are available cheap on the
auction site and there should be very little difference between this and
the DIP version (the pinouts for both versions are the same). Would this
Any chance that someone could purchase a small quantity from Arrow
Germany so Stanley could include them with the boards we ordered?
Extra payment for the chips, of course.
Joe Gray
W5JG
On Fri, Jul 9, 2010 at 7:21 PM, Richard H McCorkle
mccor...@ptialaska.net wrote:
Time-Nuts,
When the
Ed,
This should work just as well as the original without compromizing the
maximum clock rate.
Richard
Richard,
For the original circuit board, what about the 74AC175 SOIC soldered to
an SOIC to DIP adapter? These adapters are available cheap on the
auction site and there should be very
Hi
For around $4 or so you can get a CPLD and socket that will replace all of the
logic chips. They will run on +5 and go to 100 MHz. My guess is that they
would be a bit more repeatable. The downside is it's another part to program.
Bob
Sent from my iPhone
On Jul 9, 2010, at 10:02 PM,
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