Chip with simple program for Toy

Kit wrote:
On May 1, 3:39 am, "Anthony Fremont" <spam-...@nowhere.com> wrote:
Kit wrote:
Hi all,
I am making a battery powered device that uses a Single board
computer running Linux. The problem is that because I am using a CF
Card mounted read/write I cannot just cut the power to the SBC. So
I need to have some system by which the SBC can shutdown properly
before it cuts the power. I am thinking of something like the power
button on a computer.
So does anyone know how I could go about this?
A circuit would be great.

Some idea of the SBC you are using would be helpful, but it must
have some kind of i/o capability. Either a serial port, I2C or some
kind of GPIO ports must be present regardless of the SBC type. You
should be able to read from one of these in software and then
initiate a "shutdown -h now" procedure.

Sure, I am using a Technologic Systems TS-7200.
http://www.embeddedarm.com/epc/ts7200-spec-h.html

Yes, I can do that, but once the SBC is shutdown I need to turn off
the power.
Click to expand...
Ok, I think I get it now. ;-) Looks like you have a serial port on there.
After you do a "shutdown -h now", see if the DTR (or any other status) pin
changes state. If so, that could be used as the signal to an external
device to turn it off.

Or you could possibly use one of the i/o pins to start a timer that would
power off the computer after a predetermined delay. The i/o pin would be
toggle from a script that executes during shutdown.
 
Kit wrote:

Sure, I am using a Technologic Systems TS-7200.
http://www.embeddedarm.com/epc/ts7200-spec-h.html
Click to expand...
BTW, how do you like that board? Is the Linux distro stable (as in runs for
months without issue)? I'm looking to use something like as a central
controller for a bunch of home automation junk I've come up with. Mostly
just to do a bunch of long term logging, yet be accessible over the network.
 
"Eric R Snow" <etpm@whidbey.com> wrote in message
news:jjke33di98p8j72fpuigau04faqcdsvlk1@4ax.com...
Thanks to everyone who responded to my 400 Hz questions. The answers
were much more than I expected and very enlightening.
ERS
Click to expand...
Eric,
It is nice to thank people or tell them their repsonse solved your
problem but it will reach the people involved better if you just change
the title of your post in the original thread then all those who had it
marked as a thread to follow would see your thanks.

--
John G.
 
"beatbox"
Hi,
I'm making a circuit where 100n metal film capacitors are listed as
required.
Click to expand...


** Its a misprint.

Should be " metallised film ".



....... Phil
 
On May 1, 3:39 am, "Anthony Fremont" <spam-...@nowhere.com> wrote:
Kit wrote:
Hi all,
I am making a battery powered device that uses a Single board computer
running Linux. The problem is that because I am using a CF Card
mounted read/write I cannot just cut the power to the SBC. So I need
to have some system by which the SBC can shutdown properly before it
cuts the power. I am thinking of something like the power button on a
computer.
So does anyone know how I could go about this?
A circuit would be great.

Some idea of the SBC you are using would be helpful, but it must have some
kind of i/o capability. Either a serial port, I2C or some kind of GPIO
ports must be present regardless of the SBC type. You should be able to
read from one of these in software and then initiate a "shutdown -h now"
procedure.
Click to expand...
Sure, I am using a Technologic Systems TS-7200.
http://www.embeddedarm.com/epc/ts7200-spec-h.html

Yes, I can do that, but once the SBC is shutdown I need to turn off
the power.
Thanks
-Kit
 
Phil Allison wrote:

"beatbox"
Hi,
I'm making a circuit where 100n metal film capacitors are listed as
required.

** Its a misprint.

Should be " metallised film ".
Click to expand...
It *could* be metal fim. Rare I know.

More information is required.

Graahm
 
"Eeyore"
Phil Allison wrote:
"beatbox"

I'm making a circuit where 100n metal film capacitors are listed as
required.

** Its a misprint.

Should be " metallised film ".

It *could* be metal fim. Rare I know.
Click to expand...

** Like these ones - fuckwit ?????????

http://www.radioshack.com/sm-1-f-250v-10-metal-film-capacitor--pi-2102515.html






......... Phil
 
Phil Allison wrote:

** Like these ones - fuckwit ?????????

http://www.radioshack.com/sm-1-f-250v-10-metal-film-capacitor--pi-2102
515.html






........ Phil
Click to expand...
We are in Usenet, not on www!!!

Yourself fuckwit!!!!



Best regards,

Daniel Mandic
 
On 2007-04-30, Kit <kitmor@gmail.com> wrote:

Hi all,
I am making a battery powered device that uses a Single board computer
running Linux. The problem is that because I am using a CF Card
mounted read/write I cannot just cut the power to the SBC. So I need
to have some system by which the SBC can shutdown properly before it
cuts the power. I am thinking of something like the power button on a
computer.

So does anyone know how I could go about this?
Click to expand...
in linux the shutdown process is controlled by the symlinks in

/etc/rc6.d

(got questions? read up on sysv-init and/or ask again in a linux newsgroup.)

A circuit would be great.
Click to expand...
after it turns off, how is it supposed to turn on ?

does the board have a shutdown mode, if so what happens on DIO1 pin 16?
and or the USB power terminals, serial port outputs etc...

Bye.
Jasen
 
On 1 May, 18:36, John Popelish <jpopel...@rica.net> wrote:
beatbox wrote:
Hi,
I'm making a circuit where 100n metal film capacitors are listed as
required.

This was the nearest I could find on my mail order site:
http://rswww.com/cgi-bin/bv/rswww/searchBrowseAction.do?R=5219338&Nr=...

Does that component qualify as "metal film", or does it share broadly
the same characteristics as a metal film cap?

Thanks for helping.

Metal film means that thecapacitoris made of metal and
plastic film. It is not very specific. Metalized film
means that the metal is vacuum deposited on the plastic film
and is very thin and compact, but may have fairly high
series resistance. Foil film capacitors are made with
layers of metal foil and film, stacked or wound around each
other. Since the foil is generally many times thicker than
the few atoms thickness in the metalized types, they have
lower series resistance and handle large peak currents better.

Then you have to ask about the kind of plastic the film is
made of. There are many choices and each has some
advantage. Cost, size, loss, temperature range, distortion
are some possibilities.

If the film type is not specified, the most common,
polyester (mylar) is probably good enough and small and cheap.

I might give more helpfuladviceif I knew the application.
Click to expand...
Thanks all for the helpful info. Here is the circuit, for
clarification. It's a Midi -> CV converter. There are a few 100nF
capacitors in there.
http://m.bareille.free.fr/mcv628/MCV628A.PDF
 
"Daniel Mandic"

** Like these ones - fuckwit ?????????

http://www.radioshack.com/sm-1-f-250v-10-metal-film-capacitor--pi-2102
515.html


We are in Usenet, not on www!!!
Click to expand...


** Hey look - some hairy critter just poked its shit ugly head up out of a
dunny and puked !!


Daniel Mandic
Click to expand...

** Yeah - it.

ROTFL !!



....... Phil
 
Thanks for your help guys.
yes, I've got MPLAB but haven't got clued up yet.
Found the sim and been playing with it.

I have one more problem that I'm sure you will probably fall about laughing at.
I'm trying to write a Timer prog. For the miss's.
I recon everyone starting out with pic's does one of these as a 'HELLO WORLD 2'.
Anyway I've been trying to write to ports B and C on a 16F690 in the sim and when I write
a 10h to port B, I get nothing, on change on the port.
And when I try to write a 06h to port C I get a 04h on the port instead,
so RB2 isn't changing.

I can post the .asm if it would help you to help me.
But remember I'm only starting out with pics and It's not up to much.
I'm still getting to grips with it.

Thanks again guys
 
beatbox wrote:

On 1 May, 18:36, John Popelish <jpopel...@rica.net> wrote:
beatbox wrote:
Hi,
I'm making a circuit where 100n metal film capacitors are listed as
required.

This was the nearest I could find on my mail order site:
http://rswww.com/cgi-bin/bv/rswww/searchBrowseAction.do?R=5219338&Nr=...

Does that component qualify as "metal film", or does it share broadly
the same characteristics as a metal film cap?

Thanks for helping.

Metal film means that thecapacitoris made of metal and
plastic film. It is not very specific. Metalized film
means that the metal is vacuum deposited on the plastic film
and is very thin and compact, but may have fairly high
series resistance. Foil film capacitors are made with
layers of metal foil and film, stacked or wound around each
other. Since the foil is generally many times thicker than
the few atoms thickness in the metalized types, they have
lower series resistance and handle large peak currents better.

Then you have to ask about the kind of plastic the film is
made of. There are many choices and each has some
advantage. Cost, size, loss, temperature range, distortion
are some possibilities.

If the film type is not specified, the most common,
polyester (mylar) is probably good enough and small and cheap.

I might give more helpfuladviceif I knew the application.

Thanks all for the helpful info. Here is the circuit, for
clarification. It's a Midi -> CV converter. There are a few 100nF
capacitors in there.
http://m.bareille.free.fr/mcv628/MCV628A.PDF
Click to expand...
Polyester / mylar film types will be just fine there. Very commonplace and very
inexpensive. Not special at all.

Graham
 
Me wrote:

Thanks for your help guys.
yes, I've got MPLAB but haven't got clued up yet.
Found the sim and been playing with it.

I have one more problem that I'm sure you will probably fall about laughing at.
I'm trying to write a Timer prog. For the miss's.
I recon everyone starting out with pic's does one of these as a 'HELLO WORLD 2'.
Anyway I've been trying to write to ports B and C on a 16F690 in the sim and when I write
a 10h to port B, I get nothing, on change on the port.
And when I try to write a 06h to port C I get a 04h on the port instead,
so RB2 isn't changing.
Click to expand...

Check the pinout diagram of your PIC very carefully.
Many pic's don't have physical output pins for some
of the PORT register bits. Some have other functions
that 'steal' an output unless you set a control bit
somewhere.

The answer will be buried in the docs ... somewhere.
 
beatbox wrote:
On 1 May, 18:36, John Popelish <jpopel...@rica.net> wrote:
beatbox wrote:
Hi,
I'm making a circuit where 100n metal film capacitors are listed as
required.
This was the nearest I could find on my mail order site:
http://rswww.com/cgi-bin/bv/rswww/searchBrowseAction.do?R=5219338&Nr=...
Does that component qualify as "metal film", or does it share broadly
the same characteristics as a metal film cap?
(snip)
I might give more helpfuladviceif I knew the application.

Thanks all for the helpful info. Here is the circuit, for
clarification. It's a Midi -> CV converter. There are a few 100nF
capacitors in there.
http://m.bareille.free.fr/mcv628/MCV628A.PDF
Click to expand...
The capacitors you list would work for this application,
which is not at all critical. They are called supply bypass
capacitors, that provide a small local charge storage where
quick pulses of current may be needed without those pulses
having to race through the inductance of the supply
distribution lines.

More important is exactly where on the circuit board they
are mounted. They need to be connected between power supply
lines and ground, not in a cluster as shown, but at the
points where these supply lines connect to certain chips
being powered. For the +-15 volt lines, that would be right
at U6 and U8, and for the +5 line, right at U7.

It wouldn't hurt at all to add a pair between the +5 and +15
volt lines to ground at chips U3 and U4, too.

However, the voltage regulator, U2, may not be stable unless
C3 and C4 are very close to it.

If this project includes a printed circuit board, then these
locations are already taken care of, and all you have to do
is check that the capacitors you order have lead wire
spacings that fit the hole spacing of the board.
 
On May 2, 1:45 pm, John Popelish <jpopel...@rica.net> wrote:
beatbox wrote:
On 1 May, 18:36, John Popelish <jpopel...@rica.net> wrote:
beatbox wrote:
Hi,
I'm making a circuit where 100n metal film capacitors are listed as
required.
This was the nearest I could find on my mail order site:
http://rswww.com/cgi-bin/bv/rswww/searchBrowseAction.do?R=5219338&Nr=...
Does that component qualify as "metal film", or does it share broadly
the same characteristics as a metal film cap?
(snip)
I might give more helpfuladviceif I knew the application.

Thanks all for the helpful info. Here is the circuit, for
clarification. It's a Midi -> CV converter. There are a few 100nF
capacitors in there.
http://m.bareille.free.fr/mcv628/MCV628A.PDF

The capacitors you list would work for this application,
which is not at all critical. They are called supply bypass
capacitors, that provide a small local charge storage where
quick pulses of current may be needed without those pulses
having to race through the inductance of the supply
distribution lines.

More important is exactly where on the circuit board they
are mounted. They need to be connected between power supply
lines and ground, not in a cluster as shown, but at the
points where these supply lines connect to certain chips
being powered. For the +-15 volt lines, that would be right
at U6 and U8, and for the +5 line, right at U7.

It wouldn't hurt at all to add a pair between the +5 and +15
volt lines to ground at chips U3 and U4, too.

However, the voltage regulator, U2, may not be stable unless
C3 and C4 are very close to it.

If this project includes a printed circuit board, then these
locations are already taken care of, and all you have to do
is check that the capacitors you order have lead wire
spacings that fit the hole spacing of the board.
Click to expand...

It does have a PCB. Thanks again!
 
On Wed, 02 May 2007 08:48:09 +0100, Eeyore
<rabbitsfriendsandrelations@hotmail.com> wrote:

Phil Allison wrote:

"beatbox"
Hi,
I'm making a circuit where 100n metal film capacitors are listed as
required.

** Its a misprint.

Should be " metallised film ".

It *could* be metal fim. Rare I know.
Click to expand...
---
Hardly. Every ceramic capacitor in the world is a metal film
capacitor, which type would be fine in the OP's application.

If the author of the schematic meant metalized film, then the error
was in not designating the caps "metalized film" or hyphenating
"metal film."


--
JF
 
"John Fields"
Eeysore
Phil Allison wrote:

"beatbox"

I'm making a circuit where 100n metal film capacitors are listed as
required.

** It's a misprint.

Should be " metallised film ".

It *could* be metal fim. Rare I know.

---
Hardly. Every ceramic capacitor in the world is a metal film
capacitor, which type would be fine in the OP's application.
Click to expand...

** Dear John ....

The actual issue here is the industry accepted, unambiguous identifying type
name - as required for ordering purposes.

Try to follow the context.

Even when it is implied rather than visible.





...... Phil
 
"Me" <Me@thishere.com> wrote in message
news:cC_Zh.88042$aB1.9235@fe3.news.blueyonder.co.uk...
Thanks for your help guys.
yes, I've got MPLAB but haven't got clued up yet.
Found the sim and been playing with it.

I have one more problem that I'm sure you will probably fall about
laughing at.
I'm trying to write a Timer prog. For the miss's.
I recon everyone starting out with pic's does one of these as a 'HELLO
WORLD 2'.
Anyway I've been trying to write to ports B and C on a 16F690 in the sim
and when I write
a 10h to port B, I get nothing, on change on the port.
And when I try to write a 06h to port C I get a 04h on the port instead,
so RB2 isn't changing.

I can post the .asm if it would help you to help me.
But remember I'm only starting out with pics and It's not up to much.
I'm still getting to grips with it.

Thanks again guys

The source code may help. In the meantime, have you assigned ports B and C
Click to expand...
outputs?

By the way, you may reach a wider PIC audience by posting to the PIClist:
piclist@mit.edu or the online discussion groups at Microchip
(http://www.microchip.com) .

Also, you can search the archives:
http://www.piclist.com/techref/piclist/listfaq.htm#archives .

Good Luck.

Richard
 
http://wiki.openwrt.org/OpenWrtDocs/Customizing

Have you checked out OpenWRT running on Linksys WRT54G_?

Runs linux, open sourced, c/w PS, built in GPIO, serial port, 5 ethernet and
wireless for under $60!!!


"Anthony Fremont" <spam-not@nowhere.com> wrote in message
news:133feklem3pqn26@news.supernews.com...
Kit wrote:

Sure, I am using a Technologic Systems TS-7200.
http://www.embeddedarm.com/epc/ts7200-spec-h.html

BTW, how do you like that board? Is the Linux distro stable (as in runs
for months without issue)? I'm looking to use something like as a central
controller for a bunch of home automation junk I've come up with. Mostly
just to do a bunch of long term logging, yet be accessible over the
network.
Click to expand...
 
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