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2006-07-09 by tymebrit
Thank you. Yes, I have run out of space more or less. Most of my I/O is used, including all the PWM outputs. Your "controlled resistor" reference is exactly right. I needed a brightness control from full off to full on, and the outputs were going through inverters already anyways
2006-07-09 by Ralph Hilton
On Sun, 09 Jul 2006 11:07:08 -0000 you wrote: >hi everyone .i am studing Avr myself . >pleas introduce me a good , simple and useful ebook about learning AvR >thank alot Its not an ebook but I found this one useful when I started: http://www.prllc.com/productcart/pc/viewPrd.asp?i
2006-07-09 by Robert Adsett
At 12:48 PM 7/9/2006 -0500, Thomas J Keller wrote: >Robert Adsett wrote: > > > > > At 12:33 AM 7/9/06 -0500, Thomas J Keller wrote: > > >> Best bet is to diode protect (for polarity) the input to an > > >> opto-isoltor on each GPIO. This will protect you against > > >> static dis
2006-07-09 by Ralph Hilton
On Sun, 09 Jul 2006 17:34:39 -0000 you wrote: >Sealed metal box - check. :-) > >It's going into an automotive environment, which is inherently noisy. > >Now just so I can make sure I'm not confusing myself, take a look at >this diagram I whipped up: > >http://i6.tinypic.com/1zf3b
2006-07-09 by Robert Adsett
At 05:34 PM 7/9/2006 +0000, Ryan wrote: >btw, thanks for pointing out the polyswitches. I knew they existed, I >just didn't know what they were called. I'll have to look into those >for current limiting the outputs. I'll have to see if they make them >in 5 amp'ers. Remember they
2006-07-09 by Thomas J Keller
Robert Adsett wrote: > > > At 12:33 AM 7/9/06 -0500, Thomas J Keller wrote: > >> Best bet is to diode protect (for polarity) the input to an > >> opto-isoltor on each GPIO. This will protect you against > >> static discharge, excessive positive or negative inout, etc, etc., at >
2006-07-09 by Larry Barello
Well, if you are military and making something to survive a nuclear EMP event, you can do it: sealed metal box, with EMI filters on all lines going into/out of the box (choke, capacitor, clamp diodes, resistors). That is about as idiot proof as possible (and very expensive). For
2006-07-09 by tymebrit
How do you go about dimming a 7 segment display (controlled by an AVR)? I can't do it via software (already reached the limit), so I'm limited to hardware. Basically I don't want the segments getting dimmer or brighter as more or fewer of them turn on. Right now this is my circui
2006-07-09 by Ryan
Sealed metal box - check. :-) It's going into an automotive environment, which is inherently noisy. Now just so I can make sure I'm not confusing myself, take a look at this diagram I whipped up: http://i6.tinypic.com/1zf3b6b.jpg The 1k resistor keeps any current through the diod
2006-07-09 by Reza
Normally no stepper motors works on speeds beyond 1 to 2 KHz. So you can do it in one of your timer overflow interrupts. Also, any reaction which may take place against changing input signals, takes time. if this time could be large enough you can sample it in another or same tim
2006-07-09 by Robert Adsett
At 04:58 AM 7/9/06 +0000, Ryan wrote: >Thanks, I know exactly what you're talking about. However, for >someone who might inadvertantly connect a +12V supply to the pin... It >would obviously try to sink lots of current through the diode, likely >blowing it up, then blowing up the
2006-07-09 by Robert Adsett
At 12:33 AM 7/9/06 -0500, Thomas J Keller wrote: > Best bet is to diode protect (for polarity) the input to an >opto-isoltor on each GPIO. This will protect you against >static discharge, excessive positive or negative inout, etc, etc., at >very little cost. Cost of a single diod
2006-07-09 by mansourehln
hi everyone .i am studing Avr myself . pleas introduce me a good , simple and useful ebook about learning AvR thank alot
2006-07-09 by Roy E. Burrage
You might use a diode in series with the power input, Ryan, to protect from polarity inversion. Better yet, use a bridge rectifier and you can use either polarity DC as well as AC input from a wall wart. That way all you do is connect power...no problems with polarity or type as
2006-07-09 by Thomas J Keller
Best bet is to diode protect (for polarity) the input to an opto-isoltor on each GPIO. This will protect you against static discharge, excessive positive or negative inout, etc, etc., at very little cost. Cost of a single diode, and a $0.25 (US) opto-isolator. tom Ryan wrote: > >
2006-07-09 by John Samperi
At 09:37 AM 9/07/2006, you wrote: >See the attached schematic. Attachments don't come through, may want to post it in the files area. Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153
2006-07-09 by Ryan
Thanks, I know exactly what you're talking about. However, for someone who might inadvertantly connect a +12V supply to the pin... It would obviously try to sink lots of current through the diode, likely blowing it up, then blowing up the MCU. Would the effectiveness be reduced b
2006-07-08 by Ken Arck
At 10:38 PM 7/8/2006 -0000, you wrote: I need to protect an analog input for an AVR. Protect it from ESD, users connecting it wrong (i.e. to 12V power), etc. Any suggestions on what to use? Unity gain opamp? "transorb" or similar transient device??? Discussion welcome. Thanks,
2006-07-08 by Ryan
Hi everyone, I need to protect an analog input for an AVR. Protect it from ESD, users connecting it wrong (i.e. to +12V power), etc. Any suggestions on what to use? Unity gain opamp? "transorb" or similar transient device??? Discussion welcome. Thanks, Ryan
2006-07-07 by Behrooz Hariri
Thanks very much for the help. Will try another setup for power supply to see what happens. Behrooz Hariri stevech@san.rr.com wrote: possibilities 1. Bad power supply 2. Programming errors ----- Original Message ----- From: behrooz_hariri Date: Wednesday, July 5, 2006 11:01 pm Su
2006-07-06 by stevech@san.rr.com
possibilities 1. Bad power supply 2. Programming errors ----- Original Message ----- From: behrooz_hariri Date: Wednesday, July 5, 2006 11:01 pm Subject: [AVR-Chat] Strange Behavior! To: AVR-Chat@yahoogroups.com > I observe unpredictable behavior of my ATMEGA16 programmed by > BA
2006-07-06 by Tim Mitchell
AVR-Chat@yahoogroups.com wrote: > On the mega48 part it is much the same. the internal RC is > quite good over voltage and temp. > BUT the osccal from atmel is only within something like 10% > the data sheet will tell you. > some parts the number is pretty good, like 2% I have no
2006-07-06 by Don Ingram
stevech wrote: > I've used it for some time - saves time in re-learning make files used with > a semi-IDE. > > I don't know what his price is now for the IDE, but compare it to > CodeVIsion's price before deciding. > I already have licenses for CV & Imagecraft, but for me, ethern
2006-07-06 by stevech
I've used it for some time - saves time in re-learning make files used with a semi-IDE. I don't know what his price is now for the IDE, but compare it to CodeVIsion's price before deciding. The fellow over there is prompt in answering emails. For the last year or more, he's issue
2006-07-06 by gary skinner
On the mega48 part it is much the same. the internal RC is quite good over voltage and temp. BUT the osccal from atmel is only within something like 10% the data sheet will tell you. some parts the number is pretty good, like 2% I have not looked at the 162 to see what the spec i
2006-07-06 by Don Ingram
Hiya listers, Recently I've been spending a fair bit of time with gcc while working on an ethernut based project. I stumbled across the atman package. It looks like a very nice shiny front end to gcc. Initially I thought it ho-hum but after trawling the docos ( real docos! ) it s
2006-07-05 by John Samperi
G'day all In case anyone is interested in what's happening with the Dragon: a few of us ELITE 8-) avr users have received it started to use it and it looks quite good. A couple of threads from AVRfreaks on the Dragon's entry into the world: http://www.avrfreaks.net/index.php?name
2006-07-05 by behrooz_hariri
I observe unpredictable behavior of my ATMEGA16 programmed by BASCOM-AVR, after a period of time. Constant data changes, Timers give random count, functions (such as Log10 ) return wrong or NAN results, or simply ADC stop working for a fews seconds or forever! Using watchdog seem
2006-07-05 by Tim Mitchell
AVR-Chat@yahoogroups.com wrote: > Hi Tim, > > As I understand it, the chip only loads the osccal value for > it's lowest internal oscillator speed (1MHz usually). You > have to write a different value to the OSCCAL register for > running at faster oscillator speeds. > > Also reme
2006-07-04 by Ralph Hilton
On Tue, 4 Jul 2006 04:07:06 -0700 (PDT) you wrote: > > >Hendy Eka wrote: Actually i have codevision 1.24.6, but i can't use it till now. > >I can't extract this coz zip password protected.... > >Anyone knows about this zip password, i'm very pleased for ur help. > >Thank u > I ha
2006-07-04 by kernels_nz
Hi Tim, As I understand it, the chip only loads the osccal value for it's lowest internal oscillator speed (1MHz usually). You have to write a different value to the OSCCAL register for running at faster oscillator speeds. Also remember that the oscillator cal byte will be wrong
2006-07-04 by Rick Hughes
--- David VanHorn wrote: > Mike is talking about "Getting Started" I think > version 5 is the last > updated one. > http://www.dontronics.com/8515.html > > Though it's a bit dated now, it should port up to > pretty much anything > easily. Since this has been brought up, I'd like
2006-07-04 by Ricardo Callejo
You get the zip password from Codevision. Ask them!! Ricardo Callejo SURbyte ----- Original Message ----- From: MOHAMED EL DAHAB To: AVR-Chat@yahoogroups.com Sent: Tuesday, July 04, 2006 8:07 AM Subject: Re: [AVR-Chat] ;; Help me with codevision 1.24.6 ;; Hendy Eka wrote: Actuall
2006-07-04 by David VanHorn
On 7/3/06, Hendy Eka wrote: > > Actually i have codevision 1.24.6, but i can't use it till now. > > I can't extract this coz zip password protected.... > Anyone knows about this zip password, i'm very pleased for ur help. > Thank u Surely you are not asking a group of software au
2006-07-04 by MOHAMED EL DAHAB
Hendy Eka wrote: Actually i have codevision 1.24.6, but i can't use it till now. I can't extract this coz zip password protected.... Anyone knows about this zip password, i'm very pleased for ur help. Thank u (I upload this software in Files directory in this Maillist) -regards-
2006-07-04 by Tim Mitchell
I'm using a Mega162 for the first time... It should have an 8MHz calibrated RC oscillator, but actually it's running at 8.45MHz which is making the UART communications fail. I've used Tinys before where you have to write your own calibration byte, but the data sheet seems to sugg
2006-07-04 by John Samperi
At 12:40 PM 4/07/2006, you wrote: >Actually i have codevision 1.24.6, but i can't use it till now. > >I can't extract this coz zip password protected.... > >Anyone knows about this zip password, i'm very pleased for ur help. You can ask the people at Codevision they should be abl
2006-07-04 by David VanHorn
Mike is talking about "Getting Started" I think version 5 is the last updated one. http://www.dontronics.com/8515.html Though it's a bit dated now, it should port up to pretty much anything easily. If you're needing someone to write some code, I can probably help you with that. F
2006-07-04 by Hendy Eka
Actually i have codevision 1.24.6, but i can't use it till now. I can't extract this coz zip password protected.... Anyone knows about this zip password, i'm very pleased for ur help. Thank u (I upload this software in Files directory in this Maillist) -regards-
2006-07-03 by James Ronald
Sounds interesting... Anyone have link to the Begining AVR Development tutorial? I searched using google and also searched Amazon but could not fine it. I did find, Newbie's Guide To AVR Development and Novice's Guide to AVR Development but I was already aware of those. Thanks JR
2006-07-03 by Michael Haisley
khaled: I strongly suggest you talk to David VanHorn, He does contract work and has proved useful to me several times. You can reach him at microbrix@gmail.com He is the same one who wrote the Begining AVR Development tutorial that is now pretty much standard for everyone who sta
2006-07-03 by Ralph Hilton
On Mon, 3 Jul 2006 06:44:13 -0700 (PDT) you wrote: >Hi all, anybody know website that rent a firmware coder???? What do you want coding and how much cash do you have to spare? -- Ralph Hilton http://www.ralphhilton.org C-Meter: http://www.cmeter.org FZAOINT http://www.fzaoint.net
2006-07-03 by Bob Paddock
On Monday 03 July 2006 09:44, khaled saleh wrote: > Hi all, anybody know website that rent a firmware coder???? http://www.getacoder.com/ Getting someone to do your Embedded Firmware from the lowest bidder might cost you a lot more in the end. What is it that you actually need to
2006-07-03 by David Collier
I'd like to use an AT90CAN or AT91SAM7X device to monitor a vehicle ODB connector, and log the "Oil Pressure", or similar stuff. Has anyone done this, and/or does anyone know of any GPL code I can use to start from? David
2006-07-03 by khaled saleh
Hi all, anybody know website that rent a firmware coder???? --------------------------------- Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US (and 30+ countries) for 2¢/min or less. [Non-text portions of this message have been removed]
2006-07-03 by kernels_nz
Hi Richard, The info your looking for is on page66 of the Mega32(L) Datasheet. It was as I thaught, 2 watchdog oscillator cycles, which is dependent on the voltage your running at, but should be easily under 6us. Cheers Hein B Auckland, New Zealand. --- In AVR-Chat@yahoogroups.co
2006-07-01 by Jesper Hansen
I have installed SP3 and also had to download an upgrade, but my JTAGII still works (if you can call what it does working). /Jesper Don Ingram wrote: > > > As an aside, I downloaded SP3, took the recommended JTAG firmware update & > promptly lost the use of the JTAGII. > > Was in
2006-07-01 by Cat C
Sorry, I really do apologize, but I just can't stand that word, with an "s" at the end... >>> Definitions of "anyways" on the Web: A Yat word meaning "And, then" or "and, so". wworks.com/~cajunworld/cjndefs.htm Reply-To: AVR-Chat@yahoogroups.com To: Subject: [AVR-Chat] daisy-chai
2006-07-01 by Don Ingram
As an aside, I downloaded SP3, took the recommended JTAG firmware update & promptly lost the use of the JTAGII. Was in a hurry so did a quick uninstall & back to SP2. Not sure what was happening & too busy to chase it down. Curious to see if others suffered the same fate. Cheers
2006-06-30 by Stefan Wimmer
--- In AVR-Chat@yahoogroups.com, "Jay Dagenais" wrote: > > [...] Well, thanks for nothing to everyone but the last entry, I just don't get how people can waste the time writting a respose which offers nothing but non-constructive solutions! Oh, sorry to waste your (and my) time!