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2004-07-12 by David VanHorn
At 05:20 PM 7/12/2004 +0000, Graham Davies wrote: >--- In AVR-Chat@yahoogroups.com, David VanHorn wrote: > >> [in reply to my statement] For best EMI >> performance ... you need to form a grid > >> Well ... I have a lot of success with ... >> providing one and ONLY one low impeda
2004-07-12 by alimzn62
Hi to all I have probem when i want program atmega8535l with dontronics DT006 programmer and codevision c compiler. I earse the chip and when want to program this error appear "flash content mismatch at address: 0h flash read 8011h buffer data c015h continue? " any one can help m
2004-07-12 by Graham Davies
--- In AVR-Chat@yahoogroups.com, David VanHorn wrote: > My #1 rule for EMI: > #2 rule: etc. David clearly understands EMI and I hope he's not offended by the post I made before realizing this. Atmel publish an excellent application note on this subject that gives very similar adv
2004-07-12 by Graham Davies
--- In AVR-Chat@yahoogroups.com, David VanHorn wrote: > [in reply to my statement] For best EMI > performance ... you need to form a grid > Well ... I have a lot of success with ... > providing one and ONLY one low impedance > path back to the source, and not allowing > RF curren
2004-07-11 by David VanHorn
At 06:44 PM 7/10/2004 -0700, jay marante wrote: >thank you, sir... > >i've read about "gridding" the ground trace. is this right? i says that there should be grid for the ground trace through out the board, maybe horizontal on the bottom and vertical on the top layer or vice vers
2004-07-11 by jay marante
thank you, sir... i've read about "gridding" the ground trace. is this right? i says that there should be grid for the ground trace through out the board, maybe horizontal on the bottom and vertical on the top layer or vice versa. then just connect a via if i go from horizontal t
2004-07-10 by David VanHorn
My #1 rule for EMI: Put the current back where you got it from. Notice how I didn't say "let it find it's own way back there"... :) #2 rule: Keep high frequency loops short, and small. If you can, route out and back either side by side, or top and bottom. Minimizing loop area is
2004-07-10 by jay marante
thanks for all the help, guys. unfortunately, im from the philippines and asking for a consultant about PCB design is not really possible right now because of money constraints. and considering the fact that im still a college student. books would really help a lot but i can't af
2004-07-10 by David VanHorn
What am I missing kids? I set up this pin change int for the low bits of port B. Once I activate it, I get the int in sim, on every cycle. IOW, there doesn't seem to be any CHANGE required.. Do I have to do something in the ISR, to "set" the bit state?
2004-07-09 by Michael Buchstaller
>The Autorouter option is only available if you have a netlist. A netlist >can either be imported or created when you draw the schematics. Not true. You can also simply position the parts and then draw "Airwires" for the connections; mo need for a schematic. Then,entering the "AU
2004-07-09 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, jay marante wrote: > > sorry for the OT. i just don't know where to ask these questions. > > i know a little about the eagle lay-out editor. i do manual tracing of PCB. but i know there is this "auto-routing" thing where the PC routes the tracks f
2004-07-09 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, "Lyle Killough" wrote: > > Does anyone in the world have some sample Tiny13's in an SOIC8 package > that they didn't use, or know of a source for them? I'm looking for > 2-10 to finish testing a design, and would prefer be ready for > production b
2004-07-08 by Rick Hughes
Jay, I would recommend Al William's book, _Build Your Own Printed Circuit Board_. This book will show you how to use Eagle and gives some of the details on board layout basics that often get overlooked. It won't teach you everything about layout, but it's a good place for a begin
2004-07-08 by Al Welch
Jay The link below will take you to a us consultant for eaglecad who offers an at home training course for $189. This may be of interest to you. Also there is a free forum for eaglecad users where you can post question and get help from user and tech support in Europe that monito
2004-07-08 by Al Welch
Jay Sounds like you need to hire a consultant to help you out. There is one linked on the CadSoftusa.com web site for eaglecad. That might make sense for you. Also some collage classes offer project building. Al Welch -----Original Message----- From: jay marante [mailto:jaythesis
2004-07-08 by Al Welch
Try the hong kong semiconductor exchange for one possible source. Also the contact shown below has helped me with hard to get parts and pricing. ______________________________ Jamie Gulick Sales Manager Foresight Technologies, Inc. Ph: +727-490-2000 ext. 205 Fax:: +727-490-2001 h
2004-07-08 by David VanHorn
>For best EMI performance, when the ground is laid in >by hand you need to form a grid, not just a meandering wire, with >apertures in the grid as small as possible. This provides multiple >return paths for signals and greatly reduces emission of and >succeptibility to EM interfe
2004-07-08 by jay marante
can someone please guide me with PCB designs? im trying to make my first PCB with eagle. also, i can't find a mega16 in the AVR library. and, i don't know anything about the "rules" in designing a good circuit board. thanks... -jay Graham Davies wrote: --- In AVR-Chat@yahoogroups
2004-07-08 by Mark Weston
Date: Thu, 08 Jul 2004 11:49:15 -0000 From: "spiritallover" Subject: build a pototantiometer hi there how can i build a var-resistor with u-c avr? tnx Is this a cross between a potato and a resistor? Mark Weston Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages!
2004-07-08 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Phil" wrote: > I find the eagle autorouter to be pretty dumb. I would like to disagree with this, but agree with the general direction of the discussion. I use Eagle and think that the autorouter is pretty good and darned good for the money. This
2004-07-08 by upand_at_them
Why would you want to do this? It sounds like a school project. Mike --- In AVR-Chat@yahoogroups.com, "spiritallover" wrote: > hi there > how can i build a var-resistor with > u-c avr? > tnx
2004-07-08 by spiritallover
hi there how can i build a var-resistor with u-c avr? tnx
2004-07-08 by Lyle Killough
Does anyone in the world have some sample Tiny13's in an SOIC8 package that they didn't use, or know of a source for them? I'm looking for 2-10 to finish testing a design, and would prefer be ready for production by the (current) Tiny13 release date of September rather than just
2004-07-07 by Kathy Quinlan
David VanHorn wrote: > At 08:29 PM 7/6/2004 +0200, Jesper Hansen wrote: > > >>Autoroute is not magic ! >>You will always be able to do a better fit manually. >> >>I don't think ANY autorouter can do better than an >>experienced person routing manually. >> >>Autoroute only, should
2004-07-07 by Phil
--- In AVR-Chat@yahoogroups.com, David VanHorn wrote: > At 08:29 PM 7/6/2004 +0200, Jesper Hansen wrote: > I've never seen an autorouter that actually worked, on real world boards. > By that I mean boards where it matters not only that all the nets are connected, but that large p
2004-07-06 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, David VanHorn wrote: > At 08:29 PM 7/6/2004 +0200, Jesper Hansen wrote: > > >Autoroute is not magic ! > >You will always be able to do a better fit manually. > > > >I don't think ANY autorouter can do better than an > >experienced person routing m
2004-07-06 by David VanHorn
At 08:29 PM 7/6/2004 +0200, Jesper Hansen wrote: >Autoroute is not magic ! >You will always be able to do a better fit manually. > >I don't think ANY autorouter can do better than an >experienced person routing manually. > >Autoroute only, should really only be used on non-critic
2004-07-06 by Al Welch
I use Eagle and it works for me! I had to exchange emails with support and got a file with better routing settings to make it do what I desired. I think you can find these files on their support files site. Once you get the settings close it does a pretty good job. I always hand
2004-07-06 by Jesper Hansen
Autoroute is not magic ! You will always be able to do a better fit manually. I don't think ANY autorouter can do better than an experienced person routing manually. Autoroute only, should really only be used on non-critical boards. /Jesper ----- Original Message ----- From: "Phi
2004-07-06 by Jesper Hansen
The old Atmel libs were pretty buggy. You're better off with making the devices yourself, or better, upgrading Eagle :-) /Jesper ----- Original Message ----- From: "Dave Miller" To: Sent: Tuesday, July 06, 2004 5:46 PM Subject: [AVR-Chat] [OT] Older Eagle Libraries > Hello All, >
2004-07-06 by Dave Miller
Hello All, I am still using Eagle 3.55 and I am in need of some older Atmel libs. The only libraries I can find are for 4.00 and higher. Does anyone still have older copies of the Atmel AVR and 89 series of libs? Anyone know where these may reside? I have Googled but no luck yet.
2004-07-06 by Dave Miller
Hello, The Autorouter option is only available if you have a netlist. A netlist can either be imported or created when you draw the schematics. I have always used Eagle to draw my schematics then create a PCB from my schematics. This will create the necessary netlist file that wi
2004-07-06 by Phil
I find the eagle autorouter to be pretty dumb. While you can control it via a fairly complex set of options, it still makes some pretty stupid decisions and will run some very circuitous traces. Also, it only routes 100% for the simplest boards. I use autorouting to see if my pla
2004-07-06 by Bernd Felsche
On Tuesday 06 July 2004 22:29, jay marante wrote: > sorry for the OT. i just don't know where to ask these questions. > i know a little about the eagle lay-out editor. i do manual tracing of > PCB. but i know there is this "auto-routing" thing where the PC routes > the tracks for
2004-07-06 by jay marante
sorry for the OT. i just don't know where to ask these questions. i know a little about the eagle lay-out editor. i do manual tracing of PCB. but i know there is this "auto-routing" thing where the PC routes the tracks for you, like the protel design systems'. i don't know if i u
2004-07-03 by upand_at_them
Oops, sorry Jan. Mike --- In AVR-Chat@yahoogroups.com, rob@u... wrote: > No Mike, Jan isn't a guy. But to be sure you could ask _Jim_ Axelson. > He should know for sure... :-)
2004-07-03 by Saeed Ghaffari
hi every one any one knows how can i program 89s52 by isp devices. i would be grat full if some one help me? actually i found a source for isp programming but it didn't work. i designed the pcb according to schematic but it didn't work properly it just could read data from micro
2004-07-03 by rob@usbmicro.com
> I think Jan Axelson might be a guy. Sure sounds like a Scandinavian > name. No Mike, Jan isn't a guy. But to be sure you could ask _Jim_ Axelson. He should know for sure... :-) Let me mention again "The Microcontroller Idea Book" - I'll steal from the review on the last page: "
2004-07-02 by upand_at_them
I think Jan Axelson might be a guy. Sure sounds like a Scandinavian name. Mike --- In AVR-Chat@yahoogroups.com, rob@u... wrote: > Find a book called "The Microcontroller Idea Book" by Jan Axelson. > > Also very useful is her book: "Making Printed Circuit Boards". > > -Rob > USBmi
2004-07-02 by David VanHorn
At 08:38 AM 7/2/2004 -0400, Mike Bronosky wrote: >In addition to what Dave said... > >The Forrest Mims Circuit Scrapbook - I like mims, but way too many errors for my taste. >The Art of Electronics - In addition to many many great circuits it also has >an into that covers electro
2004-07-02 by wagner
Hi David, I was an electronic teacher in the past, with many students and their problems to understand what seems to be a monster, and it is only a bunch of different information and concepts. Let me try to help you in this your new endevour. If you want to get the basics of elec
2004-07-02 by Al Welch
Also CMOS Cookbook and TTL Cookbook by Don Lancaster. These will give complete details on interfacing to LEDs, use of resistors to limit current, pull ups, etc. Amazon.com has the CMOS book listed about $20. Al Welch -----Original Message----- From: David Brännvall [mailto:davidb
2004-07-02 by rob@usbmicro.com
David, > But I feel my electronics skills are way to low, I need to learn > things like: > * More basic understanding about the electronics. > * How to control things that require more current then the stk can > provide. > * How to build things without using the stk500. > * Howto
2004-07-02 by Paul Maddox
David, its more than a good book, its the 'bible' of the electronics world. Paul ----- Original Message ----- From: "David Brännvall" To: Sent: Friday, July 02, 2004 3:46 PM Subject: RE: [AVR-Chat] Electronics > Thanks that seems like a good book, I just ordered it. > > Regards,
2004-07-02 by David Brännvall
Thanks that seems like a good book, I just ordered it. Regards, David -----Original Message----- From: David VanHorn [mailto:dvanhorn@cedar.net] Sent: den 2 juli 2004 16:10 To: AVR-Chat@yahoogroups.com; AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Electronics > >But I feel my
2004-07-02 by David VanHorn
> >But I feel my electronics skills are way to low, I need to learn things >like: >* More basic understanding about the electronics. >* How to control things that require more current then the stk can >provide. >* How to build things without using the stk500. >* Howto read datash
2004-07-02 by Al Welchaxxiom
Look at data sheets for driver parts, etc at semi manufactures web site such as www.ti.com www.national.com etc. A part I use a lot from ti is the tpic2603 part... 6 channels, spi communications, heavy current drive, fully protected, etc. Drives LEDs, Solenoids, etc. Al Welch ---
2004-07-02 by Mike Bronosky
In addition to what Dave said... The Forrest Mims Circuit Scrapbook - I'm not familiar with this book but the books/booklets he has written and carried by Radio Shack had some fairly basic electronic info both theory and how to with example circuits. Its about $14.67 on Amazon. A
2004-07-02 by Graham Davies
--- In AVR-Chat@yahoogroups.com, David Brännvall wrote: > ... how to get enough current > to drive the led backlight ... > ... ideas where I can find info ... This is only going to be of marginal help, so I'll keep it short. If you take a look at the Prototyping System for the Z8
2004-07-02 by David Brännvall
Hi, I have been into programming for several years, but now I want to start with hardware. My first project will basically be a little general purpose box with lots of buttons and leds and a display, and a comport. I have bought the stk500, and I have no problem with the assembly