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cdb | 1 Nov 02:35
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Re: [PIC]MPLAB 8.40 and Windows 7, don't play nice [problem solved - sort of]

My sin in MPLAB/ Hitech C's eyes is not to use the default directory 
or drive letter.

For some reason MPLab 8.40 only recognises the Hitech C directory if 
Hitech;  

1) is installed in the 'c' directory (C:\Program Files (x86)\HI-TECH 
Software\PICC\PRO\9.65\bin) and nowhere else.

2. MPLAB is installed in a root folder of whatever drive letter is 
chosen (H:\Microchip\MPLAB IDE)

Previously, I had MPLAB one extra layer down and whilst it worked OK 
with Microchip C and CCS, Hitech it just wouldn't remember it's 
location.

I recall many moons ago, MPLAB didn't like being anywhere but the root 
directory of the root drive. Looks as though it is possible the 
'plugin' for Hitech C has it's path hard coded rather than taking it 
from the actual installation path.

This is annoying, as I try not to install programs on the drive 
containing the OS.

Colin
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Jesse Lackey | 1 Nov 05:07

Re: [EE] linux screen cap TDS210 / TDS220

Hi, I was momentarily thrilled to see this, only to discover... my TDS 
220 doesn't have a serial port, or anything that could be be even 
possibly related.  Just the front connectors/buttons that are all scope 
functionality related and AC power input.

Am I missing something?  Was this an option on some models?

Thanks for sharing though... I guess I'll stick with moderately blurry 
iphone pics.  :(

J

Mark Rages wrote:
> I've written a Python script to capture screen dumps from my Tek TDS
> 220 and format it into something easily emailed or included in a
> document.
> 
> Because it is written in Python, it should be cross-platform.  I use
> it with Ubuntu Linux.
> 
> http://vivara.net/software/tdslisten
> 
> Regards,
> Mark
> markrages <at> gmail
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Mark Rages | 1 Nov 06:11
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Re: [EE] linux screen cap TDS210 / TDS220

On Sat, Oct 31, 2009 at 11:07 PM, Jesse Lackey
<jsl-ml <at> celestialaudio.com> wrote:
> Hi, I was momentarily thrilled to see this, only to discover... my TDS
> 220 doesn't have a serial port, or anything that could be be even
> possibly related.  Just the front connectors/buttons that are all scope
> functionality related and AC power input.
>
> Am I missing something?  Was this an option on some models?
>
> Thanks for sharing though... I guess I'll stick with moderately blurry
> iphone pics.  :(
>
> J
>

It's an option.  One you obviously don't have.  It's called the
"communication extension module".   It's probably not worth tracking
the module down.  The serial screen dump is really slow.  Rather, get
one of the Rigol scopes that dump to usb stick.

Regards,
Mark
markrages <at> gmail
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Midwest Telecine LLC
markrages <at> midwesttelecine.com

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William "Chops" Westfield | 1 Nov 06:22
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Re: [EE] linux screen cap TDS210 / TDS220


On Oct 31, 2009, at 9:07 PM, Jesse Lackey wrote:

> my TDS 220 doesn't have a serial port, or anything that could be be  
> even possibly related.  Just the front connectors/buttons that are  
> all scope functionality related and AC power input.
>
> Am I missing something?  Was this an option on some models?

There's an add-on communications board that includes serial, parallel  
(printer, IIRC) and HPIB (!)

TDS2CM http://www.teknetelectronics.com/Search.asp?p_ID=13987&pDo=DETAIL

Alas, it's priced like an HPIB peripheral :-(

More recently, Tek seems to have wised up and noticed that a serial  
interface is practically free if your box already contains a  
microcontroller, and USB adds about $5 for one of those FTDI chips,  
and HPIB doesn't need to be included by default.

BillW

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Mark Rages | 1 Nov 06:25
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Re: [EE] linux screen cap TDS210 / TDS220

On Sun, Nov 1, 2009 at 12:11 AM, Mark Rages <markrages <at> gmail.com> wrote:
>
> It's an option.  One you obviously don't have.

Just so you can see what you're missing:

http://vivara.net/software/tdslisten/example_output.png

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Sean Breheny | 1 Nov 07:02
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Re: [EE] Advice on batteries for consumer use

Hi Gus,

I don't know what "primary NiMH" is. As far as I know, alkaline
batteries (especially the enhanced capacity ones like the Duracell
Ultra) have considerably greater capacity than any common rechargeable
battery. Of course, if you are considering the "total cost of
ownership" and willing to recharge you batteries many times, and do
not care too much about the run time per charge, then NiMH would be
superior to alkaline.

I think that the AA "LiON" batteries you saw were probably not Lithium
Ion but Lithium Iron Disulfide (see
http://en.wikipedia.org/wiki/Lithium_battery ). These are 1.5 to 1.6V
nominal, are not rechargeable, and have much greater capacity than
alkaline batteries - along with a higher cost.

I would recommend making a spreadsheet using data from the Duracell
and Energizer web sites, as well as price info from various retailers,
to compare the cost per energy of alkaline normal, alkaline
enhanced/ultra, lithium primary, and NiMH types. For the NiMH types,
amortize the cost of the battery over the cycle life (about 300 cycles
ideally, perhaps more like 100 cycles in typical consumer use) and add
in the cost of the charger amortized over perhaps 3 sets of batteries
worth of cycles.

Sean

On Fri, Oct 30, 2009 at 2:23 PM, NOPE9 <yes <at> nope9.com> wrote:
>
>
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Peter Loron | 1 Nov 08:51
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Re: [EE] Advice on batteries for consumer use

On Oct 31, 2009, at 11:02 PM, Sean Breheny wrote:

> Hi Gus,
>
> I don't know what "primary NiMH" is. As far as I know, alkaline
> batteries (especially the enhanced capacity ones like the Duracell
> Ultra) have considerably greater capacity than any common rechargeable
> battery. Of course, if you are considering the "total cost of
> ownership" and willing to recharge you batteries many times, and do
> not care too much about the run time per charge, then NiMH would be
> superior to alkaline.
>
> I think that the AA "LiON" batteries you saw were probably not Lithium
> Ion but Lithium Iron Disulfide (see
> http://en.wikipedia.org/wiki/Lithium_battery ). These are 1.5 to 1.6V
> nominal, are not rechargeable, and have much greater capacity than
> alkaline batteries - along with a higher cost.
>
> I would recommend making a spreadsheet using data from the Duracell
> and Energizer web sites, as well as price info from various retailers,
> to compare the cost per energy of alkaline normal, alkaline
> enhanced/ultra, lithium primary, and NiMH types. For the NiMH types,
> amortize the cost of the battery over the cycle life (about 300 cycles
> ideally, perhaps more like 100 cycles in typical consumer use) and add
> in the cost of the charger amortized over perhaps 3 sets of batteries
> worth of cycles.
>
> Sean

You also need to take into account the discharge curve of the battery
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Sean Breheny | 1 Nov 15:35
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Re: [EE] Advice on batteries for consumer use

On Sun, Nov 1, 2009 at 2:51 AM, Peter Loron <peterl <at> standingwave.org> wrote:
> You also need to take into account the discharge curve of the battery
> type in question, as well as the consumption of the device you're
> trying to power. Yes, rechargeables have a lower total mAH capacity
> that alkalines, etc, but their voltage/time curve tends to be much
> flatter, especially for NiMH cells. If the thing you're trying to run
> does well in the voltage range that NiMH cells tend to fall in as they
> are discharging, then you can actually get *more* runtime from them
> than alkaline cells.
>

Hi Pete,

I could see that this could theoretically be true, but I doubt it is
very commonly true of battery powered devices. The end-point voltage
of NiMH is about 0.9V. If you have a device which can work properly
from 1.5V down to 0.9V, then it would use the entire range of an
alkaline battery and you should still get more runtime out of the
alkaline than the NiMH. I think that the only way that an NiMH could
deliver a longer runtime would be if the device were only able to
operate below 1.3V or if it were much more efficient from 1.3V to 0.9V
than it is from 1.5V to 1.3V.

Sean
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Peter Onion | 1 Nov 17:58

[PIC] Any issues with running PICs from -5V supply ?

Resent with a TAG this time...

I'm building a PIC circuit to interface to a very old computer that uses
0v for "1" and -10V for "0".
(http://www.youtube.com/watch?v=8EKBNfm5B4U)

It will make for simpler interface circuits if I run the PIC from 0V and
-5V.  (I.E. 0V on Vcc pins and -5V on Gnd pins).   

Are there any issues with doing this ?  

PeterO

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Jan-Erik Soderholm | 1 Nov 18:15
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Re: [PIC] Any issues with running PICs from -5V supply ?

Peter Onion wrote:
> Resent with a TAG this time...
> 
> I'm building a PIC circuit to interface to a very old computer that uses
> 0v for "1" and -10V for "0".
> (http://www.youtube.com/watch?v=8EKBNfm5B4U)
> 
> It will make for simpler interface circuits if I run the PIC from 0V and
> -5V.  (I.E. 0V on Vcc pins and -5V on Gnd pins).   
> 
> Are there any issues with doing this ?  
> 
> PeterO
> 
> 

All voltages are rellative.

The PIC doesn't "know" that what it sees
as "5V" is called by you as "0V".

You could use 15V as "GND" and 20V as "5V" as
long as you do not do anything else "funny" with
your interfaces...
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Gmane