Chip with simple program for Toy

[BadHabit]

Another solution might be to just set up a windows timed event to
reboot your remote machine on a daily basis at some obscure time of
day or in the very early morning. If it is restarting ever day and
you are getting by with only having to reset every 3 or 4 days, then
the software solution would circumvent any need for a hardware fix.





On Fri, 14 Jul 2006 16:15:13 +0100, Mark Fortune <mark@fortrex.co.uk>
wrote:

ytyourclothes@p.zapto.org wrote:
EsDee wrote:

Ask yourself how many wrong numbers you get per week. Ask yourself
whether you really want your computer reset everytime someone misdials
the number of the pizza-parlor. Ask yourself whether you really want
everybody on the planet to be able to reset your computer at will.
Including everybody on usenet, once someone finds out the number you
assigned to this and posts it here.

I'm sorry, but no functional computer needs to be reset twice a week.
Hitting reset everytime your computer hangs is like buying a new car
everytime the old one runs out of gas. It is the desperate attempt to
avoid solving a problem.

If your computer hangs that often, then your setup is broken -- either
in hardware or in software. Fixing it will not only save you money in
the long run (no need to keep a GSM) but will probably teach you a
bunch of things. Some of which might even come in handy in the future.


cordially

Y.T.


I do agree with what YT says - even a windows box shouldnt need
rebooting that often, and often resorting to a hard reboot too often can
cause more problems in the long run, such as data corruption or nackered
hard disks.

However, I accept that it is sometimes necessary to hard reboot a
machine far far away, and the peace of mind and sense of power simply
being able to do it brings. However as others have stated, using a phone
is open to abuse - I for one would get a sick satisfaction from phoning
your computer to reboot it every 5 minutes. Also bear in mind that
whatever phone you are using, you can GUARANTEE that some chap will
phone your computers mobile several times a day to sell you cheap double
glazing or save you money on your energy bills. do you really want that?

However, if you do decide to go ahead with it, and you may be thinking
what im thinking here, I suggest that you connect the relay to the reset
switch and NOT the power line, reason being that the second option can
cause far more data loss and even trash your hard disk beyond useability
(ive had it happen to me during repeated brownouts - I have a ups now)

another method that springs to mind however, is to have a fully
automated "watchdog device" a watchdog card will normally set you back a
few hundred bucks/lira/quid (delete as appropriate) and works by
monitoring your computer for lockups, and rebooting if one occurs. A
cheaper alternative is to build a circuit with a monostable timer, which
can be reset if it recieves a periodic signal. IE, get some software
which sends one of the pins on the parallel port high for a second or so
every 4 minutes, and if the circuit doesnt recieve this signal to reset
itself every 5 minutes, it triggers the relay and resets the computer
(does that make sense?)

hope you find the solution that works best for you anyway.

 

[Michael A. Terrell]

Roger_the_Codger wrote:

I would have just bought my own software.

There is plenty of free stuff and paid for packages.

There is often something on ebay for a few pounds.

A few pounds of what?


--
http://improve-usenet.org/index.html

If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm

Sporadic E is the Earth's aluminum foil beanie for the 'global warming'
sheep.

 

On Jun 22, 4:30 am, Robert Baer <robertb...@localnet.com> wrote:

mpm wrote:
On Jun 21, 10:53�am, Hauke D <hau...@zero-g.net> wrote:

Hi,

I've had good experiences with Advanced Circuits (http://www.
4pcb.com/). Make sure to use their free FDM service (http://www.freedfm..com/), even if you don't end up going with them for
manufacturing.

ExpressPCB is only good for quick-and-dirty stuff. Their advantage is
that they're cheap and their design software is pretty simple to use,
but the big disadvantage is that it locks you in to their software.
Also I've never done 4-layer stuff with them; I believe they're also
kind of limited in that department. They're great for quick-and-dirty
stuff though.

Regards,
-- Hauke D

On Jun 21, 4:19 pm, "Talal Itani" <tit...@verizon.net> wrote:

Hello,

I need to have a 4-layer board made, a prototype, 2 boards, nothing fancy.
I did some research in this newsgroup and I narrowed it down to Sierra Pro
Express, ExpressPCB, and AC Advanced Circuits. �Do you think I made the
right choice? �Do you have any recommendations? �I would like to receive the
board 3-5 days.

T.I.- Hide quoted text -

- Show quoted text -

I've used ExpressPCB for small projects before, but always 2-layer
stuff.
I've never had a problem with them, or their boards.

As for being "locked-in" to their software, for an extra $60 (last
time I checked), they will send you the Gerber files. From there, you
can import to many of the other programs avail.

Also, I recall hearing a while ago that a lot of these PCB prototype
houses are all built at the same place anyway. So, while you might
see 10 different company names (i.e., resellers), the boards
themselves all come from the same place. Sorry, I don't remember the
names of the companies involved, and don't know whether ExpressPCB is
one of them.

-mpm

ExpressPCB stuff comes from Mulino OR and at one time i knew the name
of the "parent" company that will do much "fancier" boards.

Actually both ExpressPCB and PCBexpress both get shipped from Mulino,
Oregon.

ExpressPCB came up with the idea of freeware PCB layout tools and
charging for board manufacturing. They contracted with ECD (which
spunoff SunStone Circuits sometime in the late 90s) to manufacture
boards for them. ECD (or maybe SunStone) liked the idea and created
PCBexpress to tap into the market. PCBexpress created PCB123 layout
software to compete with ExpressPCB.

Regardless of how you design your boards, with ExpressPCB, PCB123, or
Eagle and then ship your gerber files to PCBexpress, the boards get
made at a PCB plant in Mulino.

The board plant used to make pretty good boards years ago when I
worked as an electronics designer for ECD. After I left, I've used
ExpressPCB to create dozens of prototypes that were made there. They
were all pretty good quality.

Mark

 

[Mark Borgerson]

In article <b339b240-31a3-4677-bb09-14089698e238
@k30g2000hse.googlegroups.com>, mhahn@hvc.rr.com says...

On Jun 22, 4:30 am, Robert Baer <robertb...@localnet.com> wrote:
mpm wrote:
On Jun 21, 10:53ďż=3Fam, Hauke D <hau...@zero-g.net> wrote:

Hi,

I've had good experiences with Advanced Circuits (http://www.
4pcb.com/). Make sure to use their free FDM service (http://www.freedfm.com/), even if you don't end up going with them for
manufacturing.

ExpressPCB is only good for quick-and-dirty stuff. Their advantage is
that they're cheap and their design software is pretty simple to use,
but the big disadvantage is that it locks you in to their software.
Also I've never done 4-layer stuff with them; I believe they're also
kind of limited in that department. They're great for quick-and-dirty
stuff though.

Regards,
-- Hauke D

On Jun 21, 4:19 pm, "Talal Itani" <tit...@verizon.net> wrote:

Hello,

I need to have a 4-layer board made, a prototype, 2 boards, nothing fancy.
I did some research in this newsgroup and I narrowed it down to Sierra Pro
Express, ExpressPCB, and AC Advanced Circuits. ďż=3FDo you think I made the
right choice? ďż=3FDo you have any recommendations? ďż=3FI would like to receive the
board 3-5 days.

T.I.- Hide quoted text -

- Show quoted text -

I've used ExpressPCB for small projects before, but always 2-layer
stuff.
I've never had a problem with them, or their boards.

As for being "locked-in" to their software, for an extra $60 (last
time I checked), they will send you the Gerber files. From there, you
can import to many of the other programs avail.

Also, I recall hearing a while ago that a lot of these PCB prototype
houses are all built at the same place anyway. So, while you might
see 10 different company names (i.e., resellers), the boards
themselves all come from the same place. Sorry, I don't remember the
names of the companies involved, and don't know whether ExpressPCB is
one of them.

-mpm

ExpressPCB stuff comes from Mulino OR and at one time i knew the name
of the "parent" company that will do much "fancier" boards.

Actually both ExpressPCB and PCBexpress both get shipped from Mulino,
Oregon.

ExpressPCB came up with the idea of freeware PCB layout tools and
charging for board manufacturing. They contracted with ECD (which
spunoff SunStone Circuits sometime in the late 90s) to manufacture
boards for them. ECD (or maybe SunStone) liked the idea and created
PCBexpress to tap into the market. PCBexpress created PCB123 layout
software to compete with ExpressPCB.

Regardless of how you design your boards, with ExpressPCB, PCB123, or
Eagle and then ship your gerber files to PCBexpress, the boards get
made at a PCB plant in Mulino.

The board plant used to make pretty good boards years ago when I
worked as an electronics designer for ECD. After I left, I've used
ExpressPCB to create dozens of prototypes that were made there. They
were all pretty good quality.

I've had excellent results with them over the last 6-8 years. They
must be getting more confident in their process control, as the
quickturn trace and space used to be 8mil/8mil. Now it's down
to 6mil/6mil. On full-service boards they will go to 5mil/5mil.
The 6mil level is good enough for any of the boards I do.

I've had upwards of 1000 boards, from perhaps a dozen designs,
with no problems other than those I caused. My last production
problem was a single whisker-short on a board about 5 years ago.
I've never seen that again, so I suppose it was a one-time under
etch.

Mark Borgerson

 

[rickman]

On Jun 29, 4:21 pm, Mark Borgerson <mborger...@comcast.net> wrote:

In article <tYCdnXlXl47nkMPVnZ2dnUVZ_sudn...@posted.localnet>,
robertb...@localnet.com says...

Don't mix up ExpressPCB and PCB Express. The latter is a division of
Sunstone, which builds boards in Mulino, Oregon. Sunstone gives me good
boards and I live close enough that the free UPS ground shipping gets me
boards the day after shipment. Sunstone also has their own free PCB
suite, PCB123.
http://www.pcb123.com/

I now order all my PCBs from Sunstone, so I'm a biased reporter. I've
been a fan of theirs since their customer service techs helped me
through some problems with an older, low-cost layout suite. They're
still helping me through some problems with bigger 4-layers boards
since I've converted to PADS.

Mark Borgerson

You must get much better service than I did. I had Sunstone build two
boards for me. The first was the production board which was ordered
in six panels of 22 each. They built seven panels to cover any losses
and still could only deliver 116 boards. That's a loss rate of 25%!

I also asked them to build the test fixture for this board. By the
time the test fixture was away to them it had turned into the long
pole in the tent schedule-wise. I gave them my info and they accepted
the order. A week later when I was expecting the order to be
delivered, I contacted them for a tracking number. I was told that
the order had been put on hold waiting for a credit card number and
when the number didn't come it was ***canceled***. It seems that they
lost the CC number and NO ONE contacted me about it! So then I had to
wait ***ANOTHER*** week. Oddly enough, they lost my CC number a
second time which again bit me in the butt... I got the test fixture
panels ok, but I still needed another panel of the production board.

They had apologized for the shortage and offered me the choice of
deducting the shortage from my bill or building another panel. I
waited until testing of the protos was complete and asked for the
replacement panel to make up the shortage which was needed to complete
the initial production build. They accepted that order, but they
spent an extra day checking the files I had to resend to them and it
went into production a day late. Of course they were not willing to
try to speed up the fabrication to make up for it. Finally they were
supposed to deliver last week on Thursday directly to the assembly
house. I contacted Sunstone on Friday to get a tracking number to see
if the panel had made it ok only to find out that they had built the
boards, but would not ship them because I was now on credit hold!!! I
had received an invoice for the test fixture a week earlier and sent
off a check which was expected on that Friday. They couldn't tell me
if the check had been received or not and they couldn't tell me if the
boards would ship or not.

I can honestly say that I have ***never*** worked with a more
incompetent group of people. Every time I contacted them I had to
start over explaining the situation. The different departments don't
seem to talk to each other, but rather expect their internal tracking
system to keep everyone informed. But I found over and over again
that no one uses the system properly. They lost my credit card
number, not once, but twice. That has got to make you wonder where it
went! But the really bad part of all this was the way that everything
that happened was as much a surprise to the various contacts there as
it was to me. They did not once inform me of anything that was
happening and when I asked it was like pulling teeth to get accurate
info from them.

I will never use Sunstone again and I would not let anyone I liked
use them either!

Rick

 

[rickman]

On Jun 29, 10:32 pm, mpm <mpmill...@aol.com> wrote:

On Jun 29, 5:34�pm, JeffM <jef...@email.com> wrote:

Mark Borgerson wrote:
Don't mix up ExpressPCB and PCB Express.
The latter is a division of Sunstone[...]
Sunstone also has their own free PCB suite, �PCB123.

Pad2Pad, ExpressPCB, & PCB123 are all essentially the same thing.
They are all lock-in-ware.
Their output is NOT portable between fab houses.
None of them produce Gerbers.

Jeff - your information is incorrect.
For $60, ExpressPCB will definitely send you a Gerber file.
I know this from first hand experience. (The others mentioned also
might, but I can't say)

I also concur that it is not the best approach if you do enough boards
to justify "better" schematic capture / PCB layout software (i.e., in-
house). But if you want to port the boards to production fabrication
(offshore), you certainly can obtain Gerbers from ExpressPCB.

-mpm

Why screw with crippleware when you can get totally free layout
programs that are as good as commercial ones? FreePCB is an excellent
program that costs nothing and has better support through the web site
forum and Yahoo group than most commercial packages have if you pay
for support!

I haven't found the perfect schematic program, but for layout, I am
very happy with FreePCB.

Rick

 

[Mark Borgerson]

In article <e9a7b4f4-fd70-44c1-aa47-72686bab2fd7
@l42g2000hsc.googlegroups.com>, gnuarm@gmail.com says...

On Jun 29, 4:21 pm, Mark Borgerson <mborger...@comcast.net> wrote:
In article <tYCdnXlXl47nkMPVnZ2dnUVZ_sudn...@posted.localnet>,
robertb...@localnet.com says...

Don't mix up ExpressPCB and PCB Express. The latter is a division of
Sunstone, which builds boards in Mulino, Oregon. Sunstone gives me good
boards and I live close enough that the free UPS ground shipping gets me
boards the day after shipment. Sunstone also has their own free PCB
suite, PCB123.
http://www.pcb123.com/

I now order all my PCBs from Sunstone, so I'm a biased reporter. I've
been a fan of theirs since their customer service techs helped me
through some problems with an older, low-cost layout suite. They're
still helping me through some problems with bigger 4-layers boards
since I've converted to PADS.

Mark Borgerson

You must get much better service than I did. I had Sunstone build two
boards for me. The first was the production board which was ordered
in six panels of 22 each. They built seven panels to cover any losses
and still could only deliver 116 boards. That's a loss rate of 25%!

I also asked them to build the test fixture for this board. By the
time the test fixture was away to them it had turned into the long
pole in the tent schedule-wise. I gave them my info and they accepted
the order. A week later when I was expecting the order to be
delivered, I contacted them for a tracking number. I was told that
the order had been put on hold waiting for a credit card number and
when the number didn't come it was ***canceled***. It seems that they
lost the CC number and NO ONE contacted me about it! So then I had to
wait ***ANOTHER*** week. Oddly enough, they lost my CC number a
second time which again bit me in the butt... I got the test fixture
panels ok, but I still needed another panel of the production board.

They had apologized for the shortage and offered me the choice of
deducting the shortage from my bill or building another panel. I
waited until testing of the protos was complete and asked for the
replacement panel to make up the shortage which was needed to complete
the initial production build. They accepted that order, but they
spent an extra day checking the files I had to resend to them and it
went into production a day late. Of course they were not willing to
try to speed up the fabrication to make up for it.
Was that delay longer than the time you waited for the prototypes

to be tested?

Finally they were
supposed to deliver last week on Thursday directly to the assembly
house. I contacted Sunstone on Friday to get a tracking number to see
if the panel had made it ok only to find out that they had built the
boards, but would not ship them because I was now on credit hold!!! I
had received an invoice for the test fixture a week earlier and sent
off a check which was expected on that Friday. They couldn't tell me
if the check had been received or not and they couldn't tell me if the
boards would ship or not.

I can honestly say that I have ***never*** worked with a more
incompetent group of people. Every time I contacted them I had to
start over explaining the situation. The different departments don't
seem to talk to each other, but rather expect their internal tracking
system to keep everyone informed. But I found over and over again
that no one uses the system properly. They lost my credit card
number, not once, but twice. That has got to make you wonder where it
went! But the really bad part of all this was the way that everything
that happened was as much a surprise to the various contacts there as
it was to me. They did not once inform me of anything that was
happening and when I asked it was like pulling teeth to get accurate
info from them.

I will never use Sunstone again and I would not let anyone I liked
use them either!

Perhaps my experience has been better because I order my boards
through their web site---which has never forgotten or misplaced
my credit card number. I've never confused the payment issue
by sending them a paper check. ;-)

Mark Borgerson

 

[rickman]

On Jul 4, 11:55 am, Mark Borgerson <mborger...@comcast.net> wrote:

In article <e9a7b4f4-fd70-44c1-aa47-72686bab2fd7
@l42g2000hsc.googlegroups.com>, gnu...@gmail.com says...


They had apologized for the shortage and offered me the choice of
deducting the shortage from my bill or building another panel. I
waited until testing of the protos was complete and asked for the
replacement panel to make up the shortage which was needed to complete
the initial production build. They accepted that order, but they
spent an extra day checking the files I had to resend to them and it
went into production a day late. Of course they were not willing to
try to speed up the fabrication to make up for it.

Was that delay longer than the time you waited for the prototypes
to be tested?

I don't understand the question.

Finally they were
supposed to deliver last week on Thursday directly to the assembly
house. I contacted Sunstone on Friday to get a tracking number to see
if the panel had made it ok only to find out that they had built the
boards, but would not ship them because I was now on credit hold!!! I
had received an invoice for the test fixture a week earlier and sent
off a check which was expected on that Friday. They couldn't tell me
if the check had been received or not and they couldn't tell me if the
boards would ship or not.

I can honestly say that I have ***never*** worked with a more
incompetent group of people. Every time I contacted them I had to
start over explaining the situation. The different departments don't
seem to talk to each other, but rather expect their internal tracking
system to keep everyone informed. But I found over and over again
that no one uses the system properly. They lost my credit card
number, not once, but twice. That has got to make you wonder where it
went! But the really bad part of all this was the way that everything
that happened was as much a surprise to the various contacts there as
it was to me. They did not once inform me of anything that was
happening and when I asked it was like pulling teeth to get accurate
info from them.

I will never use Sunstone again and I would not let anyone I liked
use them either!

Perhaps my experience has been better because I order my boards
through their web site---which has never forgotten or misplaced
my credit card number. I've never confused the payment issue
by sending them a paper check. ;-)

Sure, ordering on the web site is a great idea when it works. I tried
to place the test fixture order online three times and each time the
web site crapped out.

Don't even try to make this look like my fault. If they can't hold
onto a credit card number long enough to bill it, I am sure not going
to give them any more credit data. The real problem was the fact that
they can't communicate either internally or externally. Every time I
called, I had to start over with a new person explaining what I was
doing and who I had spoken to. When something went wrong, they didn't
communicate internally and no one ever told me about the issues. I
guess if your order goes well, then you don't see the result of their
poor communications. But if there is a snag, then it all falls
apart.

Anyone who uses Sunstone for professional work is taking a chance with
their schedule. I would compare it to those kids who thought it was
perfectly safe to tease the tiger in the zoo. In 99.9% of the zoos
that would be safe. But they happened to do it in the one zoo where
the tiger didn't know he couldn't jump a 14 foot wall! When it went
bad, it went ***really bad***.

Rick

 

[Martin Davey]

gEDA (http://www.geda.seul.org/) seems to be the best (true) open-source
package I have used.
Pretty much Linux based though...


"Roger_the_Dodger" <cresswellavenue@talktalk.net> wrote in message
news:7a629a7a-e1d6-40e7-9408-d74a1f7f6126@56g2000hsm.googlegroups.com...

I would have just bought my own software.

There is plenty of free stuff and paid for packages.

There is often something on ebay for a few pounds.

 

On Jul 5, 7:26 am, "====== Cute s ======"
<cutegirls4b...@gmail.com> wrote:

Hi....Friends,
watch and enjoy SECRET WEB-CAMS at LADIES HOSTELS and INTERNET CAFE
SCANDALS VIDEOS...

http://www.hollywoodpopstars.blogspot.com

http://www.googlemobilesphones.blogspot.com

hot videos

 

[Eeyore]

John Fields wrote:

Cleveland Tech <ClevelandTech@Hotmail.com> wrote:

I've looked over the newsgroup for a few weeks, and haven't seen anything
pop up, so thought I'd ask.

Has anyone seen any schematics floating around to make an electronic model
rocket launcher? If so, have they / could they be posted here?

You could ask these guys !

http://youtube.com/watch?v=NwIhEDq6tdY

They also did this.
http://youtube.com/watch?v=Ja2zI9f78Pc

Graham

 

[Jonathan Sivier]

On Sat, 12 Jul 2008 23:12:54 GMT, Cleveland Tech <ClevelandTech@Hotmail.com>
wrote:

My idea was to build something that can handle multiple rockets either
simultaneously (up to 4 or 5) or in succession, for a father son group.

I have a couple of Estes branded launchers, and they're only for A to D
sized engines. Part of the plan is to build a little bit more to also
handle E sized engines as well.

The size of the engine isn't really the issue, at least as far as the
electronics go. The difference is the type of propellant and the igniter it
requires. Almost any black powder motor currently available will ignite just
fine with Estes igniters and thus can be ignited using 4 alkaline batteries.
When you use composite motors, no matter how large or small, you need to use a
more energetic igniter and thus a higher voltage and/or current. There is also
the issue of the minimum distance from the launch controller to the pad as
specified by the safety code. As motors get larger this distance is longer and
thus you need longer leads on your controller.

Our club uses a launch control system using 12V gel cell batteries and large
capacitors near the launch pads to fire the igniters. The controller is over 50
feet away and can select from 8 possible launch pads. More than one can be
fired at the same time. Pushing the button on the controller sends a signal to
the box near the pads where a relay is thrown and the capacitors send a high
current pulse to the igniter leads.

Jonathan
-----
-----
Jonathan Sivier
Secretary, Central Illinois Aerospace
jsivier AT illinois DOT edu
NAR #56437
Tripoli #1906
CIA Web Site: http://www.prairienet.org/cia/
Home Page: https://netfiles.uiuc.edu/jsivier/www/

 

[Sjouke Burry]

Kris Krieger wrote:

If a circuit just calls for something like a 1 Ohm resistor, with no other
info, would it be bad to use a Current Sensing resistor there?

What would be the best way to approach looking up one to get, when no other
info is oprovided at to type or brand?

TIA!

- Kris
Pick the most stable one, like the current sense resistor.

 

[Eeyore]

simplesal wrote:

I’m looking for away to amplify the audio signal coming from my
computer sound cards output.
I’m trying to amplify the output voltage to 31 volts

31 volts rms, peak or peak to peak. It makes a big difference.

Graham

 

[sal2]

On Tue, 15 Jul 2008 03:55:16 +0100, Eeyore wrote:

simplesal wrote:

I’m looking for away to amplify the audio signal coming from my
computer sound cards output.
I’m trying to amplify the output voltage to 31 volts

31 volts rms, peak or peak to peak. It makes a big difference.

Graham

output voltage 27 Volts to 31 Volts (from 54 Volts Peak-Peak, to 62 Volts
Peak-Peak). and
Output Current at : 1.0to 1.5 milliamps

 

[Eeyore]

sal2 wrote:

Eeyore wrote:
simplesal wrote:

I’m looking for away to amplify the audio signal coming from my
computer sound cards output.
I’m trying to amplify the output voltage to 31 volts

31 volts rms, peak or peak to peak. It makes a big difference.

output voltage 27 Volts to 31 Volts (from 54 Volts Peak-Peak, to 62 Volts
Peak-Peak). and Output Current at : 1.0to 1.5 milliamps

Where did 27 come from now ? A range of 27-31V ?

You should answer questions directly not introduce new variables.

Let me ask again in this way. What is the absolute maximum peak-to-peak
voltage you require across your ultimate load ? The mA almost doesn't matter,
so don't bother with that.

Graham

 

[Eeyore]

Kris Krieger wrote:

If a circuit just calls for something like a 1 Ohm resistor, with no other
info, would it be bad to use a Current Sensing resistor there?

What would be the best way to approach looking up one to get, when no other
info is oprovided at to type or brand?

Normally one would infer type (such as say wirewound if it has to pass a high
current ) from the context of the circuit.

All resisors are 'current sensing' so to speak.

Graham

 

[Eeyore]

John Fields wrote:

On Mon, 14 Jul 2008 14:59:54 -0700 (PDT), simplesal
ratullochjk@gmail.com> wrote:

I’m looking for away to amplify the audio signal coming from my
computer sound cards output.
I’m trying to amplify the output voltage to 31 volts and the output
current to 1.5mA can someone recommend a small amplifier to do the job
or a circuit that will do this for me.

I'm just trying to do some testing.

---
31 volts * 1.5mA is 46.5 milliwatts, so if your sound card puts out
more than that just connect a transformer to it with the turns ratio
selected to give the output voltage you want into the load.

That would be a simple solution but try finding such a transformer these
days.

Graham

 

[John Fields]

On Tue, 15 Jul 2008 13:21:03 +0100, Eeyore
<rabbitsfriendsandrelations@hotmail.com> wrote:

John Fields wrote:

On Mon, 14 Jul 2008 14:59:54 -0700 (PDT), simplesal
ratullochjk@gmail.com> wrote:

I’m looking for away to amplify the audio signal coming from my
computer sound cards output.
I’m trying to amplify the output voltage to 31 volts and the output
current to 1.5mA can someone recommend a small amplifier to do the job
or a circuit that will do this for me.

I'm just trying to do some testing.

---
31 volts * 1.5mA is 46.5 milliwatts, so if your sound card puts out
more than that just connect a transformer to it with the turns ratio
selected to give the output voltage you want into the load.

That would be a simple solution but try finding such a transformer these
days.

---
Wind it.

JF

 

[Eeyore]

John Fields wrote:

Eeyore wrote:
John Fields wrote:
On Mon, 14 Jul 2008 14:59:54 -0700 (PDT), simplesal
ratullochjk@gmail.com> wrote:

I’m looking for away to amplify the audio signal coming from my
computer sound cards output.
I’m trying to amplify the output voltage to 31 volts and the output
current to 1.5mA can someone recommend a small amplifier to do the job
or a circuit that will do this for me.

I'm just trying to do some testing.

---
31 volts * 1.5mA is 46.5 milliwatts, so if your sound card puts out
more than that just connect a transformer to it with the turns ratio
selected to give the output voltage you want into the load.

That would be a simple solution but try finding such a transformer these
days.

---
Wind it.

I've been known to but damn do my fingers hurt afterwards (no machine you
see).

Grahama