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2005-09-06 by Roy E. Burrage
Have you tried AP Circuits? REB kholt@sonic.net wrote: Advanced Circuits always charges a $150 setup/tooling fee for any production run, regardless of how small. Wouldn't that fit a "small production run" quantity or do they just not do that quantity any more? REB Ken Holt wrote:
2005-09-06 by kholt@sonic.net
Advanced Circuits always charges a $150 setup/tooling fee for any production run, regardless of how small. > Wouldn't that fit a "small production run" quantity or do they just not > do that quantity any more? > > > REB > > > Ken Holt wrote: > >>If anyone can recommend any more l
2005-09-05 by Larry Barello
With the AVR it is pretty easy (well, probably difficult the first time...). http://www.barello.net/Papers/AVR%20RC%20output.pdf Shows how to generate 8 R/C pulse outputs with a couple lines of code and a shift register. You could hack it to just output one pulse (i.e. drop the s
2005-09-05 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, "Larry Barello" wrote: > With the AVR it is pretty easy (well, probably difficult the first time...). > > http://www.barello.net/Papers/AVR%20RC%20output.pdf > > Shows how to generate 8 R/C pulse outputs with a couple lines of code and a > shift r
2005-09-05 by erikc
Dave Mucha wrote: >erikc wrote >>Have you considered using a Dremel or similar motor and mounting it > > into > >>some kind of holder? >> > > > > I have thought about that, but am hoping to find a higher quality set-up. Be prepared to spend major bucks for that then. > the dremel
2005-09-05 by Tom Becker
> ... In a PWMed brushless DC motor, for example, there are three "phases"... Yes, I understand that quite well. I question the terminology. Is a brushless DC motor just the frame, stator and armature? I suggest that it is not, that it isn't a brushless DC motor unless it include
2005-09-05 by Thomas Keller
On Sun, 2005-09-04 at 19:15 -0400, Tom Becker wrote: > > ... a simple PWM controller ... Using a brushless DC motor, [] the > >speed is locked to the basic frequency of the power waveform. > Huh? DC power waveform? Please explain. I know others have already responded, but permit
2005-09-05 by Thomas Keller
On Mon, 2005-09-05 at 09:34 +1000, Peter Gargano wrote: > Thomas Keller wrote: > > Ok, guys. For this here ignorant `Murkin, what the *&^(*&^ does > > "Pty." stand for? Is this an Australian equivalent of the British > > 'Ltd.?" > Risky getting into comparisons where law is invol
2005-09-05 by Dave Mucha
Thanks all, I guess I have been more focused on how to get the signal to a purchhased R/C controller than the best way to control a motor. I would like to use a brushless motor. There seem to be pretty large burshless motors, and they can spin 25,000 PRM or better. So, if I resta
2005-09-05 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, erikc wrote: > Dave Mucha wrote: > > Hi all, > > > > I'm trying to find more data about the R/C throttle control. > > > > as I am to understand, the control input to an > > ElectronicSpeedController (ESC) is over a repetitive 20mS frame. and > > i
2005-09-05 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, Kevin wrote: > Dave, > > Dave Mucha wrote: > > Hi all, > > > > I'm trying to find more data about the R/C throttle control. > > > > as I am to understand, the control input to an > > ElectronicSpeedController (ESC) is over a repetitive 20mS frame.
2005-09-05 by david.pallant@prometheanworld.com
The company I work for here uses the National Semiconductor LMX9820 http://www.national.com/appinfo/wireless/simply_blue.html Didn't implement it myself but works! Might be easier to source than Infineon. Dave Pallant AVR-Chat@yahoogroups.com wrote on 02/09/2005 17:48:41: > Does
2005-09-05 by Leon Heller
----- Original Message ----- From: "Thomas Keller" To: Sent: Monday, September 05, 2005 12:19 AM Subject: Re: [AVR-Chat] ARRGGGHHHHH PCB's > On Sun, 2005-09-04 at 13:53 +1000, John Samperi wrote: > >> ****************************************************** >> > Ok, guys. For this
2005-09-05 by Don Ingram
Has anyone had any contact with SIPAD (or similar) PCB's at all yet. From the proto PCB angle it looks like a great process for small runs, good shelf life too. Midwest PCB in the US pricing doesn't seem too brutal but is a bit too far away. Looking for somewhere in Oz or SE Asia
2005-09-05 by Roy E. Burrage
Wouldn't that fit a "small production run" quantity or do they just not do that quantity any more? REB Ken Holt wrote: If anyone can recommend any more low-cost PCboard house in the US, I would be grateful. My old standby, Advanced Circuits, has now dropped their slow-turn proto
2005-09-05 by Ken Holt
If anyone can recommend any more low-cost PCboard house in the US, I would be grateful. My old standby, Advanced Circuits, has now dropped their slow-turn proto service, which was the best buy for 50-100 double sided . I'm not looking forward to trying out unknown new houses. Ken
2005-09-05 by Don Ingram
> > ... a simple PWM controller ... Using a brushless DC motor, [] the > speed is locked to the basic frequency of the power waveform. > > Huh? DC power waveform? Please explain. > > > Tom > > Easiest way is to think of it as you would a stepper motor which is fed with 3 phases.
2005-09-05 by Roy E. Burrage
PWM, switchmode DC. The frequency is dependent upon the switching frequency just like a stepper motor...only different. REB Tom Becker wrote: > > ... a simple PWM controller ... Using a brushless DC motor, [] the >speed is locked to the basic frequency of the power waveform. > >H
2005-09-04 by John Samperi
At 09:19 AM 5/09/2005, you wrote: >"Pty." stand for? Is this an Australian equivalent of the British >'Ltd.?" Pty Ltd=Proprietary Limited Regards John Samperi ****************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 215
2005-09-04 by Peter Gargano
Thomas Keller wrote: > > Ok, guys. For this here ignorant `Murkin, what the *&^(*&^ does > "Pty." stand for? Is this an Australian equivalent of the British > 'Ltd.?" Risky getting into comparisons where law is involved ... http://www.australia-migration.com/page/Companies_what_i
2005-09-04 by Thomas Keller
On Sun, 2005-09-04 at 13:53 +1000, John Samperi wrote: > ****************************************************** > Ok, guys. For this here ignorant `Murkin, what the *&^(*&^ does "Pty." stand for? Is this an Australian equivalent of the British 'Ltd.?" Tom
2005-09-04 by Tom Becker
> ... a simple PWM controller ... Using a brushless DC motor, [] the speed is locked to the basic frequency of the power waveform. Huh? DC power waveform? Please explain. Tom
2005-09-04 by Thomas Keller
On Sun, 2005-09-04 at 16:29 -0600, Kevin wrote: > > I'm trying to find more data about the R/C throttle control. > > I'm looking for a 25,000 RPM motor to use on a PCB drilling machine > > and these seem small enough and high speed enough to do the job. > > Unfortunatly, the comb
2005-09-04 by Kevin
Dave, Dave Mucha wrote: > Hi all, > > I'm trying to find more data about the R/C throttle control. > > as I am to understand, the control input to an > ElectronicSpeedController (ESC) is over a repetitive 20mS frame. and > in that frame there is a range between 0.5 and 2.0mS that
2005-09-04 by James Hatley
Thank you Leon, Sorry, I thought that you were actually running it at 3 volts. Yes, I can think of several ways to generate the negative voltage too... I will have to think on it... Thanks again, Jim ----- Original Message ----- From: "Leon Heller" To: Sent: Sunday, September 04,
2005-09-04 by Leon Heller
----- Original Message ----- From: "James Hatley" To: Sent: Sunday, September 04, 2005 7:56 PM Subject: Re: [AVR-Chat] 3 Volts LCD? > Hello Leon, > > I too am looking for a true 3.3v capable LCD. I've examined the PowerTip > display and true it's logic will run down to 2.7 volts.
2005-09-04 by James Hatley
Hello Leon, I too am looking for a true 3.3v capable LCD. I've examined the PowerTip display and true it's logic will run down to 2.7 volts. However, the LCD operating voltage still requires a volt lower voltage floor (4.1v voltage total) to achieve appropriate contrast control.
2005-09-04 by erikc
Dave Mucha wrote: > Hi all, > > I'm trying to find more data about the R/C throttle control. > > as I am to understand, the control input to an > ElectronicSpeedController (ESC) is over a repetitive 20mS frame. and > in that frame there is a range between 0.5 and 2.0mS that is th
2005-09-04 by Russell Shaw
Dave Mucha wrote: > Hi all, > > I'm trying to find more data about the R/C throttle control. > > as I am to understand, the control input to an > ElectronicSpeedController (ESC) is over a repetitive 20mS frame. and > in that frame there is a range between 0.5 and 2.0mS that is th
2005-09-04 by erikc
Venkat Nagappan wrote: > Dear Friends kindly send me codes to debounce a switch > > assembly language avr program is needed..., > > kindly help m eout friends > > > venkattttttttttttttt > Excuse my enthusiasm, but I came across this trick a few years back; it is incredibly elegan
2005-09-04 by Dave Mucha
Hi all, I'm trying to find more data about the R/C throttle control. as I am to understand, the control input to an ElectronicSpeedController (ESC) is over a repetitive 20mS frame. and in that frame there is a range between 0.5 and 2.0mS that is the value. That would make it so 0
2005-09-04 by Leon Heller
----- Original Message ----- From: "Russell Shaw" To: Sent: Sunday, September 04, 2005 1:57 AM Subject: Re: [AVR-Chat] ARRGGGHHHHH PCB's > Kathy Quinlan wrote: >> Hi all, >> >> This is to the AU members. >> >> where can I get QUALITY PCB's done that do not cost the earth, I have
2005-09-04 by John Samperi
At 12:32 PM 4/09/2005, you wrote: >Yeah :-( After 10 years of doing the Darling Harbour / Jeff's shed >circuit this >is the first year that I have booked the family to go as well so >that the kids >can wander about all the stuff at Darling Harbour. Now I have to >stay out in the
2005-09-04 by John Samperi
At 12:13 PM 4/09/2005, you wrote: >BEC = shite! Yeah, quote me on that. As I said I have heard people complain :-) but I'm quite happy to use them as the error percentage is quite small. I only do a couple of hundred board a year with different designs. That's the main attraction
2005-09-04 by Don Ingram
> > If you factor Lintek's 100% tested PCBs (BEC charge extra) they have > actually worked out cheaper than BEC. And I'll never recover the > ill-will BEC generated among my customers after we shipped some kits > (DIY kits are a part of our business) that had PCBs where maybe 10%
2005-09-04 by Don Ingram
Russell Shaw wrote: > Kathy Quinlan wrote: >>I need someone reliable and able to do fine etches as I do not like the >>price for 4 layer (well I do not care, but customers do ;), so I tend to >>squeeze it all on 2 layer (things like M128's, 2x Max232's,74vhc08 and >>SD card all o
2005-09-04 by Peter Gargano
John Samperi wrote: >>where can I get QUALITY PCB's done that do not cost the earth, > I use BEC in Qld. I have been using them for about 10 years. > Occasionally they mess up and they have redone the boards at > no cost, I think it only has happened twice. They are fairly > good
2005-09-04 by Russell Shaw
Kathy Quinlan wrote: > Hi all, > > This is to the AU members. > > where can I get QUALITY PCB's done that do not cost the earth, I have > been using Precision Australia, but this latest batch has had about 10 > PCB's with shorts (most were on 1 pin that was easy to get to, but on
2005-09-03 by Don Ingram
> somewhat on this, but where I live the courts can not take stuff > that is held in joint ownership with your spouse, unless the spouse > is also liable (never work with your spouse, and have a spouse that > you can TRUST!!!!) So, you own nothing in you own name except the > I s
2005-09-03 by John Samperi
At 04:05 AM 4/09/2005, you wrote: >The other option is make yourself judgement-proof. That seems expensive also to achieve :'( >You just need to insulate yourself from the business. That >might be hard if you are the sole proprietor, or are the owner of a >small corp. Because of
2005-09-03 by John Samperi
At 02:00 AM 4/09/2005, you wrote: >where can I get QUALITY PCB's done that do not cost the earth, I use BEC in Qld. I have been using them for about 10 years. Occasionally they mess up and they have redone the boards at no cost, I think it only has happened twice. They are fairly
2005-09-03 by Stefan Wimmer
--- In AVR-Chat@yahoogroups.com, "Arif YILMAZ" wrote: > Hi Stefan, > I couldn't have a look at the chips at atmel (atmel pdfs just don't show > up on my browser) but as far as I know they are not 8 pin devices, but > they are cool as well I will consider thank you. I guess the ch
2005-09-03 by JChavez@soboce.com
Tom, I think they are talking about 8-pin Dataflash. AT45D021 or AT45D041 is inside Butterfly if someone wants example code. Javier Thomas Keller @yahoogroups.com con fecha 03/09/2005 07:15:07 a.m. Por favor, responda a AVR-Chat@yahoogroups.com Enviado por: AVR-Chat@yahoogroups.c
2005-09-03 by Dennis
Look in the back pages of Electronic Design. There are usually about 6 PCB houses advertising in there. I use PCB123 for layout. They also have a board shop. Protos tend to always be pricey but they do excellent work with fast turn. I'm finishing a proto project. The boards are a
2005-09-03 by arhodes19044
John, Interesting question. I am in the medical field in the US, and around here it is a medical liability feeding frenzy. It costs a ton, evne when one has never had a suit filed. My understanding is that other countries are not nearly as bad, but still if you cause a major disa
2005-09-03 by Kathy Quinlan
Hi all, This is to the AU members. where can I get QUALITY PCB's done that do not cost the earth, I have been using Precision Australia, but this latest batch has had about 10 PCB's with shorts (most were on 1 pin that was easy to get to, but one has a couple of shorts on the +5V
2005-09-03 by arhodes19044
In software, when the edge is detected, then just wait for the time it takes a switch to finish bouncing before you ever re-check the state of the switch. Use a delay or whatever. I prefer hardware debouncing (just a low pass RC filter, and a schmitt trigger inverter), that way I
2005-09-03 by Thomas Keller
On Fri, 2005-09-02 at 11:53 +0300, Arif YILMAZ wrote: > Hi Stefan, > I couldn't have a look at the chips at atmel (atmel pdfs just don't > show up on my browser) but as far as I know they are not 8 pin > devices, but they are cool as well I will consider thank you. Probably not y
2005-09-03 by Bernd Felsche
On Saturday 03 September 2005 11:12, Don Ingram wrote: > > The story so far: > > Worker's compensation is compulsory in Australia if > > you operate as a company. Should look at some other > > form of accident insurance if you don't. > In Queensland at least, Worker's compensatio
2005-09-03 by Bernd Felsche
On Saturday 03 September 2005 10:47, John Samperi wrote: > At 11:01 AM 3/09/2005, you wrote: > >I enquired about professional indemnity insurance (PII) when > >starting my business (6 years ago) but it was then too expensive > >(more than what I envisaged to be my salary) > > OUC