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PID
Sci.Electronics.Design is a worldwide Usenet news group that is used to discuss various aspects of Electronic Circuit Design.
We found 76 threads matching "pid"
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The most relevant threads are listed first
Problems with Autotuning for a servo control
Wolfgang - 2008-12-19 14:27:00
What I want: A Autotuning for a servo control
The Process: The control signal is the current of the motor. The motor
has an encoder which is used for the field oriented control and
additionaly for position control.
The control loop: there is one PID controler for the position control.
The E...
how to used frequency in compensators.....................
pavank ningala - 2008-01-07 09:18:00
hi,
this is pavan,presently i am dealing online ups project.In that i am
usin pid and pfc fuctions. in pid i get problem in using of
compensators,any one please send me voltage compensator transfer
fuction equation and current compensator transfer fuction
equation.please send me breifly.........power supply control
Jamie Morken - 2008-09-14 17:28:00
Hi,
I am using an FPGA to control a SMPS, and was thinking that instead of
the "standard" PID loop type control, maybe it would be useful to
control the power supply using a smarter algorithm. For example if the
components in the power supply are known (ie. inductance, capacitance,
turns...frequncy problem in voltage compensator transfer fuction ....................
pavank ningala - 2008-01-08 00:34:00
hi,
this is pavan,presently i am dealing online ups project.In that i
am
using pid and pfc fuctions. in pid i get problem in using of
compensators,any one please send me voltage compensator transfer
fuction equation and current compensator transfer fuction
equation.
I have one equation....Looking for Ready made stand alone DIGITAL PID.
Jamie - 2009-07-01 14:14:00
As it said.
We need to replace some analog PID boards due to supply and
side effects the existing ones have.
The PID code that comes in digital drives and process controllers
are pretty much what we're looking for how ever, we only need just
a design that allows a input ref, reference f...Re: USB enumeration order
Martin Riddle - 2009-04-23 22:36:00
I think the enumeration order is the sequence of which devices appear on
the bus.
The proper way to find the usb device is to look for the vid & pid,
which involves calling the API for the device list.
The FTI chips probably all have the same vid and pid, and are enumerated
as com 1 to whate...Re: Incandescent Lamp Resonance
2009-03-26 07:53:00
RST Engineering (jw) wrote:
> I've got to come up with a new "automotive" (12 volt automotive type system)
> lamp dimmer to replace the old linear design that's been on the market for a
> very long time. I'd like to do PWM but I have also seen some PWM designs
> where the filament in a smal...OT: Google is getting really smart
Spehro Pefhany - 2008-01-16 01:19:00
type in this: 1 lakh indian rupees in USD
(the price of Tata's new car)
and it responds: 1 lakh Indian rupees = 2 547.2 U.S. dollars
http://www.bloomberg.com/apps/news?pid=20601091&sid=acHGVoFxur.Q&refer=india
...Ping: Joerg
Jan Panteltje - 2008-06-25 09:14:00
Joerg, maybe this will interest you:
RFID tags stop medical equipment:
http://www.heise.de/newsticker/Studie-RFID-Systeme-beeinflussen-Medizintechnik--/meldung/109971/from/atom10
List:
http://www.amc.nl/?pid=5266
...Re: 4x8 or 4x10 character LCD?
Martin Griffith - 2008-05-29 13:55:00
On Thu, 29 May 2008 13:29:00 GMT, in sci.electronics.design _
wrote:
> Are these made? If not, available surplus?
>
> Package size cannot be changed and will not take typical LCD's of 2 x 16/20
> (or larger).
>
> Don't want graphic lcd if possible - too much uC oomph and coding needed...Re: Remoteing HD TV from Satellite Box
Jan Panteltje - 2009-12-20 15:11:00
On a sunny day (Sun, 20 Dec 2009 14:26:58 -0500) it happened RFI-EMI-GUY
wrote in
:
> I have a Dish Network box installed in my living room along with my 46"
> Sony Bravo LCD panel. My wife would like to mount a smaller LCD panel in
> the dining room slaved from the other setup. I have...Re: Universal PIC switchmode status report
Jan Panteltje - 2009-02-05 18:56:00
On a sunny day (Thu, 5 Feb 2009 14:34:49 -0800 (PST)) it happened JeffM
wrote in
:
> Jan Panteltje wrote:
> > Universal PIC switchmode status report
> >
> > Today added the cycle by cycle current limit,
> > it is working here, to limit the current to a low value.
> > cycle_by_cycle...Re: SMPS inverter voltage feedback methods
MooseFET - 2008-01-26 13:02:00
On Jan 26, 8:13 am, Jamie Morken wrote:
> Hi,
>
> For this circuit:
>
> http://rocketresearch.nekrom.com/new/split%20phase%20240VAC%20inverte...
>
> For measuring the "120VAC-x" signals at 200kHz bandwidth what would a
> good way to do this?
[....]
> just a simple resistor divi...Position Sensor 2 D
Howhurley - 2008-07-07 11:26:00
I am working on a design requiring synchonization of two tool pieces
with a variable thickness membrane between them. I want to be able to
run a system to get the parts within a few mm, and a laser with enough
excess gain to be picked up on a pcb mounted ccd mounted on a sensor
on the bottom. ...She-e-e-esh SHIT!
Jim Thompson - 2008-10-02 12:36:00
She-e-e-esh SHIT!
http://www.bloomberg.com/apps/news?pid=20601103&sid=aKd0vyGN8L2k&refer=us
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| ...Re: help in researsh
Frank Buss - 2008-07-17 04:16:00
daivouda@gmail.com wrote:
> I would appreciate it if anyone could help me find the datasheets for
> the following 2 products which i wasn't able to find almost
> everywhere:
How did you searched for the datasheets? When searching for "5-147292-2
TYCO" at http://www.google.com, the first ...Re: GPIB control of an HP8591 spectrum analyzer
Fred Bloggs - 2008-01-17 10:17:00
> I'm the (mostly) happy user of an HP8591E spectrum analyzer
> equipped with a noise measurement option (Opt.119).
>
> On the rear panel, it has a switched 28V power connector
> to control a calibrated noise source. Does anyone know
> how to switch on and off this output using GPIB co...Re: New Audiophool Product
Eeyore - 2008-06-15 02:07:00
"Paul Hovnanian P.E." wrote:
> $500 ethernet cables: http://www.usa.denon.com/ProductDetails/3429.asp
Certain claims in that would legally actionable in the UK.
They make a reduced claim here
http://www.denon.co.uk/site/frames_main.php?main=prod&ver=&MID=3&sub=1&action=detail&Pid=307
...Re: zero voltage crossing PWM controller IC's
Spehro Pefhany - 2007-12-24 14:35:00
On Mon, 24 Dec 2007 14:55:32 GMT, the renowned Jamie Morken
wrote:
>
> Do they exist? To quote George Bush "I heard rumours on the internets"
> that they might.
>
> cheers,
> Jamie
I'd probably use a microcontroller, as I often do for things such as
PID zero-voltage switching temp...my "proportional/derivative" led driver? comments please!
2009-04-17 15:32:00
i am new to PID theory and circuit design, and I threw this together
over a few days.
http://i242.photobucket.com/albums/ff197/acannell/leddriverpid.jpg
the goal is to create a voltage controlled current driver for an LED,
where the current is directly proportional to the voltage, i.e. 100mV...Re: What is this connector?
Anyolmouse - 2009-04-05 20:03:00
"Tim Wescott" wrote in message
news:cIWdncb5Uom2o0TUnZ2dnUVZ_vydnZ2d@web-ster.com...
> Crossposted to rec.models.rc.air
>
> I need a replacement connector for a JR (model airplane) transmitter
> battery pack, both board-side and wire end. Preferably I'd like to
know
> manufacturer ...Re: Are these voltages good or bad ?
Skybuck Flying - 2008-08-02 11:09:00
> For those that can't see the picture, the voltages were:
>
> System freeze:
>
> Vcore: 1.39 v
> +3.3: 3.26 v
> +5: 4.89 v
> +12: 11.84 v
The seasonic s12 power supply is probably bad when comparing to the numbers
in these charts:
http://www.pcper.com/article.php?aid=531&type...power supply regulation
Jamie Morken - 2008-12-15 03:40:00
Hi,
I am using the voltage error * gain to set dutycycle for regulating the
voltage output of a power supply, under load we are getting a couple
volts lower output voltage than the desired output voltage, but other
than that overall the regulation seems to be working well. What is a
good...Re: exists a xenon strobe chemat to erase UV EPOMs ?
Mike Harrison - 2008-01-03 05:42:00
On Wed, 2 Jan 2008 17:52:04 -0500, "robb" wrote:
> is a xenon strobe light suitable/efficient for erasing uv EPROMs
>
> are there any details that should be attended to if the answer is
> maybe ?
>
> i did google and these found sirtes
> http://repairfaq.cis.upenn.edu/sam/strbfaq.ht...Re: Moldable Iron Powder
PeterD - 2009-11-23 19:05:00
On Mon, 23 Nov 2009 13:35:38 -0600, Tim Wescott
wrote:
> On Mon, 23 Nov 2009 13:55:37 -0500, PeterD wrote:
>
> > On Mon, 23 Nov 2009 12:41:46 -0600, Tim Wescott
> > wrote:
> >
> > > A long-term back-burner project just got my attention when I found out
> > > that Home Depot sell...Re: DC/DC converter for tacho feedback
Jamie - 2009-11-09 20:00:00
jodleren wrote:
> Hello
>
> I am repairing an 30 years old machine, a Pfauter 320, where there was
> a DC servo drive without feedback (Heldt&Rossi), and the tachometer
> was used to setting the speed of other axises.
> Now, there is a Mentor 2 drive (from controltechnigues), which ne...Re: 6U rack mounting instrument case
Dave M - 2009-10-17 19:24:00
Ian Bell wrote:
> I need a 6U high 19inch rack mounting instrument case for my next
> project. I can find plenty of 4U high cases but not one 6U high case.
>
> I am in the UK.
>
> Cheers
>
> Ian
Google is loaded with places to locate 6u rack panels, chassis and
accessories. Ju...Adapting a Garmin Traffic Receiver to car antenna?
DaveC - 2010-02-23 15:25:00
Garmin makes an "integrated" FM traffic info receiver for some models of GPS
that allows connection to the car's AM/FM antenna. But not my model (Nuvi
660); I must use only the GTM20, a cigarette-lighter-powered model:
Benefits of using the car's antenna are mostly stealth: the
cord-t...Re: OT: Stupid soldering Idea
J.A. Legris - 2009-10-13 11:56:00
On Oct 13, 9:42=A0am, "Jon Slaughter" wrote:
> Ok, I know this is stupid and I know people will respond saying it is stu=
pid
> but who cares?
>
> Would it be feesible to simply apply a tacky paste to the pads of a pcb
> board then coat the board with powered tin. The board is blown dr...Re: USB microscopes for very small SMT
Jan Panteltje - 2008-12-05 07:20:00
On a sunny day (Thu, 04 Dec 2008 22:51:16 -0500) it happened Spehro Pefhany
wrote in
:
> http://www.oldversion.com for "light" programs that won't bog down
> your netbook.
>
> See, for example, ACDSee
>
>
> ACDSee 1.0 for Windows 95 (0.5 MB)
...
I have installed xpdf (pdf ...RF relay ground connections
Joel Koltner - 2008-03-12 15:02:00
Has anyone here used the type of RF relay that's packaged like this one:
http://www.rfrelaystore.com/productdesc.php?pid=RDT-2P1D6 ? If you look at
the mounting drawing link on that page
(http://www.rfrelaystore.com/pdf/mounting/1500901.PDF), the idea is that your
hog out a pocket on your P...Re: OT Multifunction Tool Review
krw - 2009-07-12 16:44:00
On Sun, 12 Jul 2009 13:34:52 -0700, Joerg
wrote:
> Jim Thompson wrote:
> > On Sun, 12 Jul 2009 08:24:20 -0700, Joerg
> > wrote:
> >
> > > Thanks for the review, Ed, very nice!
> > >
> > > So it seems this tool is up to par for the occasional user. Noise, gear
> > > box heat...Re: name of flexible wire wound round core of threads
John Fields - 2009-04-14 11:44:00
On Tue, 14 Apr 2009 04:08:54 +0100, sam wrote:
> Hi guys. I've got two questions about a type of wire I sometimes
> come across. Hope you can help.
>
> --------
>
> (Q.1) What's the correct name for the flexible wire sometimes used
> for headphone leads or (UK) telephone extensions ...Re: Headset Adapter?
flipper - 2009-01-16 16:09:00
On Fri, 16 Jan 2009 09:47:59 -0700, Jim Thompson
wrote:
> I have a nice Logitech USB headset that I use for Skype.
>
> Does there exist an adapter that would allow this headset to be used
> with a regular land-line phone? (It has a standard jack.)
>
> I'd like to not have to have two ...Auto heading
Marco Trapanese - 2009-03-29 06:23:00
Hello,
I need to develop an auto heading feature for a small underwater vehicle
(ROV).
On board there are a rate-gyro and a flux-gate compass.
I was able to use the rate-gyro for short-term heading stabilization,
that is it tries to maintain the current heading in presence of external
or ...Help getting started on programmable microcontrollers?
2009-03-28 04:59:00
Hello folks,
I'm working on a project where I need a circuit that reads in a
voltage, and then outputs a voltage based both on the signal, and also
the past history of the signal. Sort of like PID, except that it is
open loop, and the Vin to Vout function can be arbitrary and
programmable. ...Re: How do you design these days?
Joerg - 2010-01-06 12:28:00
Jim Thompson wrote:
> On Wed, 06 Jan 2010 08:50:43 -0800, Joerg
> wrote:
>
> > Jim Thompson wrote:
> > > On Wed, 06 Jan 2010 08:30:46 -0800, John Larkin
> > > wrote:
> > >
> [snip]
> > > > We're contracting out an FPGA design for $125 an hour, discounted from
> > > > the g...Re: OpAmp Q:
Jan Panteltje - 2009-01-19 10:18:00
On a sunny day (Mon, 19 Jan 2009 09:04:15 -0600) it happened krw
wrote in :
>
>
> Question from a too-long digital type: Given a run-of-the-mill
> voltage feedback OpAmp (e.g. LM833) is there a benefit of certain
> ranges of resistor values, other than the obvious (bias/offset
> ...Re: A good digital oscilloscope?
Jan Panteltje - 2009-12-08 14:09:00
On a sunny day (Tue, 08 Dec 2009 10:58:50 -0800) it happened Joerg
wrote in :
> > > > ftp://panteltje.com/pub/DVD_remote_fluorescent_buttons_img_1676.jpg
> > > Try some strontium aluminate. It's something like 10x better a light
> > > storage thing than the old ZnS stuff.
> > >
> > ...Re: Difficult soldering problem
legg - 2008-04-01 19:53:00
On Tue, 1 Apr 2008 09:24:36 -0700 (PDT), Richard Henry
wrote:
> I am dealing with a rather thick printed circuit board (0.185") which
> is populated mostly with surface-mount parts on one side. However,
> there are also some SMA vertical RF coax connectors. We are having
> difficulty get...