Chip with simple program for Toy

[Kathy]

Coffee dude is on bad halucinogenics.

Don K. -- your knowledge of scientific events is very impressive!!! Please,
try to impress upon Coffee dude the effect of bad drugs on his brain
cells....he's not getting the message.
~~~
Kathy

"Fred Garvin" <garv@elaborate.net> wrote in message
news:2005070406394811272%garv@elaboratenet...

On 2005-07-03 20:33:04 -0400, "The Flavored Coffee Guy"
elgersmad@rock.com> said:

In spite of NASA's refusal to accept that the pressures resulting from
deep impact's impact on the comet being well beyond those found on the
sun, they've posted no warnings.

They assume that the comet is a rubble pile. As if there isn't any
potential of a comet impacting an meteorite, and producing a solid
core...

Snip!


What kind of drugs are you on???


--
PCs, like air-conditioners, are useless when you open Windows.

 

[John Fields]

On 04 Jul 2005 17:10:04 GMT, "Roger Johansson" <no-email@no.invalid>
wrote:

What you need is basically what a music amplifier does.
It takes 110V and makes DC voltage which powers an amplifier which can
drive a loudspeaker.

Add a variable frequency generator and connect it to the input of the
amp.

If the output stage of the amp gives high enough voltage you can use it
as your new, variable frequency power supply.

I described this using an ordinary household item, an amplifier, to
explain what needs to be done in simple terms.

---
Unfortunately, the ballast transformer which drives the fluorescent
lamp(s) is rated to work at 60 (50?) Hz, not from 15 to 200Hz, :-(


--
John Fields
Professional Circuit Designer

 

[Terry Pinnell]

"Gerhard v d Berg" <gvdberg@risccsir.co.za> wrote:

Have a look at this circuit
http://www.terrypin.dial.pipex.com/Images/DampDetector.gif

I don't think he's interested - I suggested that (with full details)
up-thread about 5 days ago!

--
Terry Pinnell
Hobbyist, West Sussex, UK

 

[John Fields]

On Mon, 4 Jul 2005 13:41:56 -0700, "Kathy" <kburke65@comcast.net>
wrote:

Coffee dude is on bad halucinogenics.

---
There are no bad hallucinogenics, there are only bad trips.

--
John Fields
Professional Circuit Designer

 

[John Fields]

On Mon, 04 Jul 2005 16:31:08 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Mon, 4 Jul 2005 13:41:56 -0700, "Kathy" <kburke65@comcast.net
wrote:

Coffee dude is on bad halucinogenics.

---
There are no bad hallucinogenics, there are only bad trips.

---
Oops... There are no bad _hallucinogens_, but there may be bad
hallucinogenics....

--
John Fields
Professional Circuit Designer

 

[Chris Selwyn-Smith]

I needed to do a similar thing and used some novelty christmas
decoration electronic kits available in th UK from Maplins

bobchabot@yahoo.com wrote in news:1118979455.508549.119990
@o13g2000cwo.googlegroups.com:

I am working on a model that calls for 12 randomly (or appears to be
random) blonking LED's. I am a total newbie to this so I am looking
for help in working up a list of items I will need and help with the
circuit board I am guessing I will need to make these LED's blink. Any
help would be much appreciated.

 

[Tom LeMense]

[snip]

Unfortunately, the ballast transformer which drives the fluorescent
lamp(s) is rated to work at 60 (50?) Hz, not from 15 to 200Hz, :-(

True enough - but typically if one sticks to frequenceis ABOVE the rating
(in this case, 60 Hz) it's OK. Go below that, however, and the transformer
will magnetically saturate and undoubtley fail due to overheating.

TJL

 

[ehsjr]

Watson A.Name - "Watt Sun, the Dark Remover" wrote:

"Ban" <bansuri@web.de> wrote in message
news:R_9we.83451$75.3993141@news4.tin.it...

sandeep wrote:

Hi to all ,
I want to know about the different BJT/FETamplifier configurations
about their working and which component is used in them and why?
And how they are used practically?
Thank you.

You want to know everything. Better inscribe for some EE classes at

local

university. You then learn how to formulate questions and which books
(what's that?) to look in. Learn how to read schematics, the parts are

all

mentioned there. You will find everything on the net too, just a

little

persistance needed. Make it your hobby to build whatever amplifier you
meant. And do not want instant pleasure, that is possible with drugs

only.

The way is arduous but when you have designed your first amp and it

works

fine, the pleasure is all yours.
--
ciao Ban
Bordighera, Italy


Hey, Ban - I read that ITER is going to build that nuclear fusion
monstrosity in Cadarache, France, not far from where you're at. Are you
going to glow in the dark? We won't need any more LEDs then. Scary
thought. ;-))



But only if he fits in an Altoids box! )

Ed

 

[John Fields]

On Tue, 05 Jul 2005 03:42:43 GMT, "Tom LeMense"
<tlemense@rhymes.with.bahoo> wrote:

Unfortunately, the ballast transformer which drives the fluorescent
lamp(s) is rated to work at 60 (50?) Hz, not from 15 to 200Hz, :-(

True enough - but typically if one sticks to frequenceis ABOVE the rating
(in this case, 60 Hz) it's OK. Go below that, however, and the transformer
will magnetically saturate and undoubtley fail due to overheating.

---
Do you have any data which supports that at frequencies higher than
60Hz the ballast will operate properly?

--
John Fields
Professional Circuit Designer

 

[Ban]

Watson A.Name - "Watt Sun, the Dark Remover" wrote:

"Ban" <bansuri@web.de> wrote in message
news:R_9we.83451$75.3993141@news4.tin.it...
sandeep wrote:
Hi to all ,
I want to know about the different BJT/FETamplifier configurations
about their working and which component is used in them and why?
And how they are used practically?
Thank you.

You want to know everything. Better inscribe for some EE classes at
local university. You then learn how to formulate questions and
which books (what's that?) to look in. Learn how to read schematics,
the parts are all mentioned there. You will find everything on the
net too, just a little persistance needed. Make it your hobby to
build whatever amplifier you meant. And do not want instant
pleasure, that is possible with drugs only. The way is arduous but
when you have designed your first amp and it works fine, the
pleasure is all yours. --
ciao Ban
Bordighera, Italy

Hey, Ban - I read that ITER is going to build that nuclear fusion
monstrosity in Cadarache, France, not far from where you're at. Are
you going to glow in the dark? We won't need any more LEDs then.
Scary thought. ;-))

I know, I just made a contract with them. Measurement systems (temp,
pressure). It will take some time to function, if at all, but then there
will be scarse crude oil supply, so it might save our lifestyle.
Well after all when the Deuterium is sufficiently present in the
Mediterraneum, you float easier.
--
ciao Ban
Bordighera, Italy

 

[petrus bitbyter]

"royalmp2001" <royalmp2001@hotpop.com> schreef in bericht
news:1120571410.104393.227430@f14g2000cwb.googlegroups.com...

I need to design a programmable square wave oscillator
(fixed/variable/sweeping frequencies upto about 35KHz) with
programmable timed on/off intervals...for instance so many minutes on,
then so many minutes off, then on again, etc.

I know nothing about PIC programming, but I have a PIC programming
board that connects to my pc, and if I know that it is possible to do
this with a PIC, I will get a book on PIC programming.
Thanks
royalmp20

Lots of info about PICs on the net and what you want to make can be done
relatively easily once you've had some exercise in PIC programming. One of
the places I often point to for a starters is:
http://www.voti.nl/swp/n_index.html
But there is much, much more on the net.

petrus bitbyter

 

[Dan Hollands]

There are 3 issues

1. convert the change in resistance into an analog signal

2. digitize the analog signal and get the digital value into the
microcontroller

3. convert the digitized value into real units

Which are you concerned about?

Dan



--

Dan Hollands
1120 S Creek Dr
Webster NY 14580
585-872-2606
QuickScore@USSailing.net
www.QuickScoreRace.com


"MarkMc" <mmcnospam@yahoo.co.uk> wrote in message
news:1120581097.596235.247300@f14g2000cwb.googlegroups.com...

Can anybody give me any hints ideas or circuits to allow me to read the
temperature from a Pt100 RTD probe in to a PIC microcontroller?

Regards,
Mark

 

[Al Smith]

Refrence to finding sun's pressure at the convective zone
http://www.sparknotes.com/astronomy/sun/section4.rhtml

Refrence to impact pressures
http://www.science.org.au/nova/058/058key.htm

The flash from several angles
http://deepimpact.jpl.nasa.gov/home/index.html

The Movie of the blast, with the excess light removed.
http://www.nasa.gov/mov/121527main_MRI_impact.mov

Refrence to pressures nearly equal to those achieved by deep impact.
http://flux.aps.org/meetings/YR01/DPP01/abs/S1600101.html

All of the required information needed to calculate an estimate is
refered to in all of the above links as a sum of links and refrences.

Weren't you predicting some sort of terrible disaster? The whole
thing's over and done with. Where's the fusion explosion? Where's
the EM pulse? They didn't happen, did they? All you got was a
flash from the impact -- which anybody might have predicted.

 

[Tom LeMense]

Hi John,

No, I've not operated a ballast transformer above 60 Hz, but I *have*
operated many 60Hz power transformers at higher frequencies, up to 400 Hz,
without incident. It's a strong function of the primary inductance, which
is sized for 60 Hz - once the frequency is higher, the transformer is less
prone to saturation, so runs cooler. On the other hand, I've seen the
disaterous results of what happens when a 60 Hz xformer is pressed into
long-term service at 50 Hz, too...

TJL


"John Fields" <jfields@austininstruments.com> wrote in message
news:917kc1h0tqmvmblcu5bj9gk783aufgdi66@4ax.com...

On Tue, 05 Jul 2005 03:42:43 GMT, "Tom LeMense"
tlemense@rhymes.with.bahoo> wrote:

[snip]
Unfortunately, the ballast transformer which drives the fluorescent
lamp(s) is rated to work at 60 (50?) Hz, not from 15 to 200Hz, :-(

True enough - but typically if one sticks to frequenceis ABOVE the rating
(in this case, 60 Hz) it's OK. Go below that, however, and the
transformer
will magnetically saturate and undoubtley fail due to overheating.

---
Do you have any data which supports that at frequencies higher than
60Hz the ballast will operate properly?

--
John Fields
Professional Circuit Designer

 

[John Fields]

On Tue, 05 Jul 2005 21:21:24 GMT, "Tom LeMense"
<tlemense@rhymes.with.bahoo> wrote:

Hi John,

No, I've not operated a ballast transformer above 60 Hz, but I *have*
operated many 60Hz power transformers at higher frequencies, up to 400 Hz,
without incident. It's a strong function of the primary inductance, which
is sized for 60 Hz - once the frequency is higher, the transformer is less
prone to saturation, so runs cooler. On the other hand, I've seen the
disaterous results of what happens when a 60 Hz xformer is pressed into
long-term service at 50 Hz, too...

---
Yes, in order to maintain the same permitted flux density in a
transformer operating at a frequency less than it was designed for,
its input voltage must be lowered by the ratio of the frequencies:

f1
Vin2 = Vin1 ----
f2

so, for a transformer with a 240V 60Hz primary, the permissible input
voltage at 50Hz would be:


50Hz
Vin2 = 240V ------ = 200V
60Hz

AIUI, a fluorescent ballast is more like an inductor than it is a
power tranformer in that it has to generate a high voltage kick in
order to ionize the gas in the tube and then, once the arc is
established, supply a more-or-less constant current to the tube for
the remainder of the half-cycle. Since the inductive reactance of the
ballast is what limits the current through the lamp, and since
inductive reactance varies with frequency, I would expect the lamp to
dim if the input input frequency to the ballast was increased.

http://home.howstuffworks.com/framed.htm?parent=fluorescent-lamp.htm&url=http://www.misty.com/people/don/f-lamp.html

--
John Fields
Professional Circuit Designer

 

[Don Klipstein]

In article <1120588713.921356.307120@g47g2000cwa.googlegroups.com>, The
Flavored Coffee Guy wrote:

Refrence to finding sun's pressure at the convective zone
http://www.sparknotes.com/astronomy/sun/section4.rhtml

The convective zone is not the core of the sun, and any calculation for
pressure at the highest pressure point here (they don't supply a figure)
is far less than that in the core. In between the core and the convective
zone is the radiative zone, which is thicker than the convective zone.
Obviously most of the sun's mass is surrounded by the convective zone.

Meanwhile, http://www.tqnyc.org/NYC040747/TheSun.htm

says either 250 billion or 340 billion atmospheres for pressure in the
core (gives 2 different figures).

http://www.proeducation.co.uk/pdfs/hires/sun.pdf says core pressure is
about 100 billion kc/cm^2, approx. 100 billion atmospheres.

Refrence to impact pressures
http://www.science.org.au/nova/058/058key.htm

Gives impact pressures in car collisions. Can you give any figures for
the peak pressure in the comet impact?

http://www.lpi.usra.edu/meetings/lpsc2002/pdf/1875.pdf says the probe has
a mass of 350 kg and was projected to hit the comet at 10.1 km/sec. The
news last night said the probe was about the size of a dishwasher - let's
say 1 square meter.
100 billion atmospheres, a lower estimate of pressure in the sun's core,
or roughly 1E16 pascals, implies a force in the ballpark of 1E16 newtons
to decellerate a probe with a frontal area of 1 square meter.

1E16 newtons divided by 350 kg is a decelleration of about 2.85E13
meters/sec^2. Divide this into square of 10,100 m/sec means that constant
decelleration would stop the probe in .0036 millimeter.
Since the probe's length/depth or whatever probably got squashed by a
good 100,000 times this, I would give a rough ballpark estimate of peak
pressure of a million atmospheres, good chance less given estimates of the
probe to dig up to 80 meters into the comet.

Looks like the peak pressure was around or less than 1/100,000 of that
in the sun's core.

The flash from several angles
http://deepimpact.jpl.nasa.gov/home/index.html

The Movie of the blast, with the excess light removed.
http://www.nasa.gov/mov/121527main_MRI_impact.mov

How is this evidence of a nuclear reaction?

Refrence to pressures nearly equal to those achieved by deep impact.
http://flux.aps.org/meetings/YR01/DPP01/abs/S1600101.html

Highest pressure cited here is 2 Mbar, roughly 2 million atmospheres or
1/50 of a low figure for the pressure in the core of the sun.

This page also does not mention anything about "Deep Impact". I don't
see an explanation how a pressure nearly equal to any pressure mentioned
here is supposed to have occurred during "Deep Impact".

All of the required information needed to calculate an estimate is
refered to in all of the above links as a sum of links and refrences.

- Don Klipstein (don@misty.com)

 

[Don Klipstein]

In article <slrndcm5i9.p70.don@manx.misty.com>, I, Don Klipstein wrote:

In article <1120588713.921356.307120@g47g2000cwa.googlegroups.com>, The
Flavored Coffee Guy wrote:

Refrence to pressures nearly equal to those achieved by deep impact.
http://flux.aps.org/meetings/YR01/DPP01/abs/S1600101.html

Highest pressure cited here is 2 Mbar, roughly 2 million atmospheres or
1/50 of a low figure for the pressure in the core of the sun.

Make that 1/50,000

This page also does not mention anything about "Deep Impact". I don't
see an explanation how a pressure nearly equal to any pressure mentioned
here is supposed to have occurred during "Deep Impact".

- Don Klipstein (don@misty.com)

 

I think its one of these...

http://www.jperkinsdistribution.co.uk/detail.php?JPNO=5510050&activepage=1&Navmain=Batteries/Chargers&subcatname=Lead%20acid%20-%20gel%20cells

....the output from my charger is 12V/450mA so I guess it would take

100h to fully charge a flat /70Ah car battery?

Is it safe to charge a car battery unattended? I usually just leave my
current 12V on charge permenantly in the garage and just take it off
charge to go flying. I always supervise LiPos when I charge them, but
they only take 1h, I dont really fancy baby sitting a 12V car battery
for 100h!

Thanks

David Bevan
http://www.davidbevan.co.uk

 

1. Walk back to your car to charge the lipos (or the lead battery)

Charging from my car is an option I had thought about since it has got
a 12V output in the back. The thing that put me off was that the LiPos
are best charged outside of the car (since in certain circumstances
they can catch fire) and I didnt really want to leave 2 or three LiPos
(at Ł50 each) laying around on the floor where someone might walk off
with them.

3. How about some sort of foot pump like generator that you can pump the
small lead battery back up, or possibly a lipo directly to save a few
strokes, perhaps even while you are flying.

Not too sure if thats a serious suggestion?

4. Buy more lipos and pre-charge them?
At Ł50 each I have bought 3 batts and 2 chargers as this allows for

almost continuous flying.

Thanks

David Bevan
http://www.davidbevan.co.uk

 

Decide how many charges you want, then buy cyclic or deep-discharge rated SLA of appropriate capacity.

Is SLA short for sealed lead acid? As thats what I have got now and I
cant seem to find them over 7Ah? I am charging 1600mAh LiPo packs, and
get 2 or 3 charges before the charger refuses to charge (as input
voltage has dropped)

I guess if im realistic then I will go to the patch with 3 charged
LiPos and probably wont want more than 10 flights which will mean
7x1600mA = 11Ah - so I guess I would need a minimum of 15Ah in the 12V.
Please let me know if you can find such a battery.

Thanks

David Bevan
http://www.davidbevan.co.uk