On Sun, 26 May 2013 00:12:58 +
li...@lazygranch.com wrote:
If you go arm cortex
A little note here: Arm Cortex are multiple families of processors for
different uses. And they vary a lot!
Cortex-M:
This family is ment to replace the old ARM7TDMI chips that are so ubiquitous.
They are
John, for guys like us who grew up with basic, there is an excellent
(compiled) pic basic from
http://www.protonbasic.co.uk/
I had a look at c, but decided at my time of life I wanted to produce
working projects not learn new (cryptic to me) languages so I stuck with
what I was comfortable with.
Hi
On May 25, 2013, at 11:26 PM, Herbert Poetzl herb...@13thfloor.at wrote:
On Sat, May 25, 2013 at 09:26:02PM -0400, Bob Camp wrote:
Hi
I realize this is a bit like water torture - sorry about that.
If I go to Microchip Direct and ask for a PIC 18F with two
UARTS and two A/D's I get
Hi
At least with the newer versions ( the X stuff), they really seem to want to
see the PIC Kit 3.
Bob
On May 25, 2013, at 10:20 PM, Herbert Poetzl herb...@13thfloor.at wrote:
On Sat, May 25, 2013 at 10:04:59PM -0400, Bob Camp wrote:
Hi
If you are putting money into a Microchip
Hi
One of the original starting points was a free tool chain. Paying major money
for a compiler is moving a bit far from that. You would have to do a *lot* of
home projects to justify that cost.
Bob
On May 25, 2013, at 10:17 PM, Clint Turner tur...@ussc.com wrote:
Having used PICs since
Hi
I started out loading Unix via tape on a PDP-11 back in 1974. C has been around
for a while. It's also got a bit of baggage from those roots. I do indeed code
quite a bit in C, I just don't use it for everything. Different tools for
different jobs.
Bob
On May 25, 2013, at 10:52 PM, Orin
Hi Jason,
Firstly I'm pro PIC so what I say is likely biased ;-)
Look at one of the Microchip PicKit 3 (or even PicKit 2) starter kits. See
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGEnodeId=1406dDocName=en538340
The
Those readings look more like an OCXO than an Rb standard. Does it's
behaviour as it locks match what I described earlier? You might also
have your 5370 counter misconfigured. The 4.43 second Sample Interval
suggests that you've got the Display Rate knob turned fully
counterclockwise. make
Hi Charles,
I'm biased, but here goes.
With regard to long term support it's hard to beat Microchip products. They
still supply (or at least a pin equivalent) and support all their controller
products.
They built their business on support and low cost, reliable development tools.
You are not
On Sun, May 26, 2013 at 07:48:08AM -0400, Bob Camp wrote:
Hi
At least with the newer versions ( the X stuff), they
really seem to want to see the PIC Kit 3.
As I said, it's a marketing move: the PICkit 2 was
declared obsolete after the main developer left
Microchip and the PICkit 3 was
On Sun, May 26, 2013 at 07:46:38AM -0400, Bob Camp wrote:
Hi
On May 25, 2013, at 11:26 PM, Herbert Poetzl herb...@13thfloor.at wrote:
On Sat, May 25, 2013 at 09:26:02PM -0400, Bob Camp wrote:
Hi
I realize this is a bit like water torture - sorry about that.
If I go to Microchip Direct
But for many applications, the inevitable overhead
(power, heat, external components, OS, etc) simply
eliminates the gain of having a better/faster CPU.
Sometimes I end up using a 6 or 8 pin PIC with only
a few lines of code to to solve complex problems where
a (F)PGA/CPLD design would be a
Hi,
I'm looking for the datasheet of the Oscilloquartz 8602 oscillator.
I cannot find it at the usual places or anywhere with google.
Any help would be appreciated
Attila Kinali
--
The people on 4chan are like brilliant psychologists
who also happen to be insane and
On 05/26/2013 06:04 PM, Attila Kinali wrote:
Hi,
I'm looking for the datasheet of the Oscilloquartz 8602 oscillator.
I cannot find it at the usual places or anywhere with google.
Any help would be appreciated
The OSA 8602 is a variant of the OSA 8600 and 8601. These variants is
mainly on
On 5/26/13 9:00 AM, Chris Albertson wrote:
But for many applications, the inevitable overhead
(power, heat, external components, OS, etc) simply
eliminates the gain of having a better/faster CPU.
Sometimes I end up using a 6 or 8 pin PIC with only
a few lines of code to to solve complex
Besides I got them to run NTP and they're too jittery for my taste.
How good/bad were they?
What were you using for a time source? Does it have PPS support?
Here's ntpq -c pv for one of my RPIs after 25 days of uptime:
associd=0 status=0615 leap_none, sync_ntp, 1 event, clock_sync,
NTP does not really sync to a server. What it does is use the set
of reference clocks that pas the clock selection criteria. THere is
an algorithm that determines if a reference clock is reasonable or
not.A reference clock can be a GPS or another NTP server or a cell
phone service or any of
Hi
On May 26, 2013, at 11:21 AM, Herbert Poetzl herb...@13thfloor.at wrote:
On Sun, May 26, 2013 at 07:46:38AM -0400, Bob Camp wrote:
Hi
On May 25, 2013, at 11:26 PM, Herbert Poetzl herb...@13thfloor.at wrote:
On Sat, May 25, 2013 at 09:26:02PM -0400, Bob Camp wrote:
Hi
I realize
A fan controller (8-pin DIP package) is simple enough to build on perf
board. But mostly I agree that it is best to buy these on PCBs. You can
use them right out of the box. I do have an Arduino and it's advantage is
that you can build very fast. I had a device that measured the resistance
Hi
If you head over to the auction sites and do a bit of creative digging /
bidding, the Arduino clones are amazingly cheap. They easily beat the $12 or so
Freescale and TI demo boards by a wide margin cost wise. Bang for the buck
wise, indeed the demo boards win out. For blinking a LED,
I use the Arduino as a rapid prototype development platform. I build the
application and the hardware on the Arduino and then move the cpu to a
standalone board. You can also use the Arduino as a programmer much like
someone else suggested.
Bob
On May 26, 2013, at 13:19, Chris Albertson
For making a blinking LEDs, it is hard to beat a 74LS74. However, a PIC, is
probably less expensive! :)
On May 26, 2013, at 13:33, Bob Camp li...@rtty.us wrote:
Hi
If you head over to the auction sites and do a bit of creative digging /
bidding, the Arduino clones are amazingly cheap.
Hi,
I bought a used Temex LPFRS-01 / LPRO from fluke.l on ebay. Unfortunately the
unit is broken and shows the same defect as was mentioned about a year ago on
this list: after warm-up it locks for a few seconds, but lock is lost again
after a few seconds. The lock output pulls low for a few
The two threads here, Good (cheap) PIC chip choice for project? and
Follow-up question re: microcontroller families have a lot of good
information. A more organized approach is available at the
Digi-Key/Design News Continuing Education Center which has several free
courses on microcontroller
Hi
Check the output frequency of the unit as it sweeps. I'd bet it's not quite
making it to 10 MHz. Look for a trimmer cap near the master crystal. It should
be possible to tweak it so the sweep makes it to either side of 10 MHz.
Bob
On May 26, 2013, at 1:43 PM, Gerd v. Egidy li...@egidy.de
I don't have an LPFRS, but if I'm reading the manual correctly, the
fourth column of numbers on the 'M' command (4D, 4C on your screen
capture) is the VCXO control voltage. Shouldn't this be continuously
sweeping up and down until it finds lock? Does the output frequency
sweep up and down
On Sun, May 26, 2013 at 4:50 AM, Bob Camp li...@rtty.us wrote:
Hi
One of the original starting points was a free tool chain. Paying major
money for a compiler is moving a bit far from that. You would have to do a
*lot* of home projects to justify that cost.
Indeed. I wouldn't pay
Hi Ed,
I don't have an LPFRS, but if I'm reading the manual correctly, the
fourth column of numbers on the 'M' command (4D, 4C on your screen
capture) is the VCXO control voltage. Shouldn't this be continuously
sweeping up and down until it finds lock?
You are right, it sweeps the control
Probably, one of the best advantages of AVR over PIC is that with avr you
can use the GCC compiler. Gcc of course is the compiler used everywhere
and supports real ANSI C and has a good optimizer and it's free. So if
you use AVR you can port most C code you find that was written for UNIX
Well, its a matter of opinions I guess. The RPi has one UART which is also the
console port, so so much for that, and 17 IOs in total from the link in the
message below.
On the other hand, the BeagleBone Black has 96 IOs including several UARTs. I
have one of each at the moment, and it seems
In message CABbxVHvP0JmXo=ObnZUmtTH=7-ohixswixa0hy3svgo4gqd...@mail.gmail.com
, Chris Albertson writes:
Probably, one of the best advantages of AVR over PIC is that with avr you
can use the GCC compiler.
I recently had enough of all the trouble with both AVR and PIC chips
and went ARM, which
Hi
Actually GCC does support *some* of the PICs. I'd prefer to go with a = PIC24
and run the free version of the Microchip compiler rather than GCC in this
case. The optimization isn't quite as neat in the free Microchip compiler, but
the price is right and the thing does work.
Bob
On May
Hi Gerd,
When it locks for a few seconds, make a note of the VCXO control
voltage. Watch it as closely as you can during the lock period. Is it
very near one end of the sweep range? Does it then drift off the end of
the range when lock is lost? That behaviour would suggest that the VCXO
Hi
It is interesting how the various outfits sneak around the flash loader issue
on their low end boards. Some of the dual CPU approaches I've seen actually
have as much horsepower in the loader CPU as they do in the target. I'm not
complaining about getting 2 usable cpu's for a bit over $10….
Hi Ed,
When it locks for a few seconds, make a note of the VCXO control
voltage. Watch it as closely as you can during the lock period. Is it
very near one end of the sweep range? Does it then drift off the end of
the range when lock is lost? That behaviour would suggest that the VCXO
In message eed8cc97-4c42-4eed-93fa-b52073051...@rtty.us, Bob Camp writes:
It is interesting how the various outfits sneak around the flash loader issue
on their low end boards. Some of the dual CPU approaches I've seen actually
have as much horsepower in the loader CPU as they do in the target.
Hi Jason:
I've done a number of PIC projects in assembly language because it like it.
I like the 8 pin parts where they are all that's needed. But if you want to have USB or LAN connections then you'll
need one of the much bigger parts or better already assembled boards.
With a simpler part
Bah, 8 pins is way overkill for a fan controller, Microchip has a uC in a SOT-6
package that could probably do the job :)
Didier
Chris Albertson albertson.ch...@gmail.com wrote:
But for many applications, the inevitable overhead
(power, heat, external components, OS, etc) simply
eliminates
For some of the TI and NXP boards I have seen, the debug chip is clearly bigger
than the target, probably due to the fact that the debut chip has USB and USB
is typically only supported in the bigger chips.
Didier
Bob Camp li...@rtty.us wrote:
Hi
It is interesting how the various outfits
bow...@gmail.com said:
For making a blinking LEDs, it is hard to beat a 74LS74. However, a PIC, is
probably less expensive! :)
Thanks. :)
I was going to send a wise-ass comment, but then I checked some numbers.
Digikey, one-off DIP pricing:
$0.62 SN74LS74
$0.55 PIC10F200
$0.33
--
Kenton A. Hoover
ken...@nemersonhoover.org
+14158305843
On Sunday, May 26, 2013 at 12:35, Didier Juges wrote:
Well, its a matter of opinions I guess. The RPi has one UART which is also
the console port, so so much for that, and 17 IOs in total from the link in
the message below.
On
Hi
Ok, *but*
Power?
Mounting / circuit board?
LED's?
Resistors?
Bypass caps?
Control inputs?
I believe I first learned how fast wire turns into something else when
there's a short while JFK was president. That lesson in doing things quick and
dirty has stuck with me. If a gizmo is going to
Ed, I'd unplugged the Rb from the counter and into the timer for measurement.
During this time it had dropped out of lock again.
That's why the Allan Deviation is so bad, it was sweeping.
But I didn't realise as there was no counter attached!
I need to connect something up to the 'lock' pin for
On 5/26/2013 8:24 PM, Mark C. Stephens wrote:
Ed, I'd unplugged the Rb from the counter and into the timer for measurement.
During this time it had dropped out of lock again.
That's why the Allan Deviation is so bad, it was sweeping.
But I didn't realise as there was no counter attached!
I
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