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2005-07-05 by Dave VanHorn
At 07:44 PM 7/4/2005, Alexandre Guimaraes wrote: >Hi, Dave > >Thanks a lot for the fast answer... > >http://www.qrpp-i.com/elmer001/elmer001-e.htm > >That one looks really nice and is as simple as it can get... I do have some >questions about it... But I will breadboard it tomorr
2005-07-05 by erikc
Alexandre Guimaraes wrote: > Hi, Dave > > Thanks a lot for the fast answer... > > http://www.qrpp-i.com/elmer001/elmer001-e.htm > > That one looks really nice and is as simple as it can get... I do have some > questions about it... But I will breadboard it tomorrow to see... > >
2005-07-05 by Alexandre Guimaraes
Hi, Dave Thanks a lot for the fast answer... http://www.qrpp-i.com/elmer001/elmer001-e.htm That one looks really nice and is as simple as it can get... I do have some questions about it... But I will breadboard it tomorrow to see... It generates a sine wave, do you thing the Tiny
2005-07-05 by Dave VanHorn
At 07:21 PM 7/4/2005, Alexandre Guimaraes wrote: Hi, All this talk about crystals got me thinking about a cheap way to make a external oscillator for the Tiny13.... The only thing bad about this part is that it can not drive a crystal to make serial comms possible :-( Nothing can
2005-07-05 by Alexandre Guimaraes
Hi, All this talk about crystals got me thinking about a cheap way to make a external oscillator for the Tiny13.... The only thing bad about this part is that it can not drive a crystal to make serial comms possible :-( Nothing can be perfect.... Does anyone have a handy, small a
2005-07-04 by Dave VanHorn
At 06:30 PM 7/4/2005, Pigeon wrote: Oh, ok.. I guess I was thinking xtal1 would output.. instead of input.. So that is why the pin8 on the crystalclock oscillator would be hooked directly up to xtal1. So what would I do with xtal2? Leave it unconnected? It's an unused output, so
2005-07-04 by Pigeon
Oh, ok.. I guess I was thinking xtal1 would output.. instead of input.. So that is why the pin8 on the crystalclock oscillator would be hooked directly up to xtal1. So what would I do with xtal2? Leave it unconnected? thanks Lee ----- Original Message ----- From: Kathy Quinlan To
2005-07-04 by Dave VanHorn
At 05:24 PM 7/4/2005, Pigeon wrote: Hmm.. because I would rather have something super simple.. and high quality, I like the idea of the crystal clock oscillator http://rocky.digikey.com/WebLib/Epson/Web%20Data/SG-51,531%20Series.pdf but my question is. I see pin1: 0E pin7: GND pi
2005-07-04 by Kathy Quinlan
Pigeon wrote: > Hmm.. because I would rather have something super simple.. and high > quality, I like the idea of the > crystal clock oscillator > http://rocky.digikey.com/WebLib/Epson/Web%20Data/SG-51,531%20Series.pdf > > but my question is. > I see > pin1: 0E > pin7: GND > pin8
2005-07-04 by Pigeon
Hmm.. because I would rather have something super simple.. and high quality, I like the idea of the crystal clock oscillator http://rocky.digikey.com/WebLib/Epson/Web%20Data/SG-51,531%20Series.pdf but my question is. I see pin1: 0E pin7: GND pin8: OUT pin14: Vdd but what pins go
2005-07-04 by Dave VanHorn
At 04:27 PM 7/4/2005, Pigeon wrote: Hmm. I have none of that extra hardware.. I will go with the 33pF like Kathy. Even if the 27pF was perfect'', this would still be a better solution that going with ceramic resonators? "better" is hard to define. Resonators are less accurate. If
2005-07-04 by Pigeon
Hmm. I have none of that extra hardware.. I will go with the 33pF like Kathy. Even if the 27pF was perfect'', this would still be a better solution that going with ceramic resonators? Oh yeah, I was thinking about going with something like an Crystal Oscillator Modules.. but I co
2005-07-04 by Dave VanHorn
At 04:08 PM 7/4/2005, Pigeon wrote: Yes, all the crystals said 18pF (I take it, that that is all Ineed to know to know what caps I need?) Also.. I have no scope. How will I see what ones are closer? Do you have a shortwave radio with BFO? A frequency counter? Other than that, you
2005-07-04 by Pigeon
Yes, all the crystals said 18pF (I take it, that that is all Ineed to know to know what caps I need?) Also.. I have no scope. How will I see what ones are closer? thanks Lee ----- Original Message ----- From: Dave VanHorn To: AVR-Chat@yahoogroups.com ; AVR-Chat@yahoogroups.com Se
2005-07-04 by James Hatley
the code below that you sent should not compile as there needs to be a semi-colon after the word data ... and ... it looks like your first while needs 2 equal signs. why don't you post your actual code so we can see what you are really using ... both you initialization and your t
2005-07-04 by Dave VanHorn
At 10:30 AM 7/4/2005, Paul Maddox wrote: >Dave, > > > I don't, because of space, > >doesn't take up much more than a crystal and two caps. The smallest I've seen are square, about 400 mils >Huh? >i would've thought the output of tehse would've cleaner and better defined >that a c
2005-07-04 by Paul Maddox
Dave, > I don't, because of space, doesn't take up much more than a crystal and two caps. > cost, yep, they are more. > and potential EMI problems. Huh? i would've thought the output of tehse would've cleaner and better defined that a crystal with caps. > Plus, I just don't see t
2005-07-04 by Dave VanHorn
At 09:49 AM 7/4/2005, Paul Maddox wrote: >Just my tuppence, > >I use Crystal Oscillator Modules, I find them more stable and reliable than >a crystal with caps. >Plus they usually have enough 'umph' to drive multiple AVRs.. I don't, because of space, cost, and potential EMI probl
2005-07-04 by Paul Maddox
Just my tuppence, I use Crystal Oscillator Modules, I find them more stable and reliable than a crystal with caps. Plus they usually have enough 'umph' to drive multiple AVRs.. Paul
2005-07-04 by Dave VanHorn
At 11:57 PM 7/3/2005, Pigeon wrote: Thanks for the reply! I cannot find any 30pF for breadboarding.. I found 27pF: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=338257&Row=256525&Site=US and they carry 33pF: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?
2005-07-04 by Kathy Quinlan
Pigeon wrote: > Thanks for the reply! > > I cannot find any 30pF for breadboarding.. > > I found 27pF: > http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=338257&Row=256525&Site=US > > > and they carry 33pF: > http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Re
2005-07-04 by aswinefy2003
I have the following code written in icc avr compiler uart_init()//intialiation of uart delay(); while(condition=true) { while(!(UCSRA&(1
2005-07-04 by aswinefy2003
Even after trying the code mentioned the problem is not rectified Please suggest some reason --- In AVR-Chat@yahoogroups.com, "arhodes19044" wrote: > If the compiler optimizes it away, then it thinks that USCRA is not > volatile. So.... can you declare somehow that UCSRA is volat
2005-07-04 by Pigeon
Thanks for the reply! I cannot find any 30pF for breadboarding.. I found 27pF: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=338257&Row=256525&Site=US and they carry 33pF: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=338569&Row=256670&Site=US What w
2005-07-04 by Dave VanHorn
At 10:03 PM 7/3/2005, Pigeon wrote: Sounds good. Just to double check (because I am about to make an order from digkey) (and my last order.. I had some wrongly ordered parts) For the Caps, I would use: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=328204&Row=415594
2005-07-04 by Pigeon
Sounds good. Just to double check (because I am about to make an order from digkey) (and my last order.. I had some wrongly ordered parts) For the Caps, I would use: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=328204&Row=415594&Site=US And for the Crystals, I wou
2005-07-03 by Dave VanHorn
> >I have a project where I need to be able to adjust the crystal frequency >to a specific "exact" value. I haven't breadboarded it yet, but do you >have any experience or advice along this line? My thought was to just >make one of the crystal caps variable (make any difference w
2005-07-03 by Don Jackson
Dave VanHorn wrote: >>I have wondered just how important the associated capacitors are for accuracy? > > > Bing, pet peeve button pressed.. :) > http://www.dvanhorn.org/Micros/All/Crystals.php Hi Dave! I've read your web page(s) and like your discussion not only on xtals but also
2005-07-03 by Roy E. Burrage
Johnathan, ESD protective devices (wrist straps, mats, chairs, etc.) have a 1M resistor in the drain wire to bleed off the charge built up in a work area. I've seen these work well even for women wearing pantyhose and polyester clothing...not that we really want to test them to t
2005-07-03 by Ralph Hilton
On Sun, 03 Jul 2005 13:58:41 -0000 you wrote: >I am doing a tach project and timing is important. > >As I understand, resonators are lower accuracy than crystals, and many >resonators have internal caps. Easier to install, and often not very >important. > >I have wondered just ho
2005-07-03 by Dave VanHorn
> >I have wondered just how important the associated capacitors are for accuracy? Bing, pet peeve button pressed.. :) http://www.dvanhorn.org/Micros/All/Crystals.php
2005-07-03 by Dave Mucha
I am doing a tach project and timing is important. As I understand, resonators are lower accuracy than crystals, and many resonators have internal caps. Easier to install, and often not very important. I have wondered just how important the associated capacitors are for accuracy?
2005-07-03 by John Samperi
At 01:55 PM 3/07/2005, you wrote: >So HC49 is the package/case type? > >I didn't see any hc49-hs on digikey.. just hc49 hc49/51 hc49/UA hc49/us Must be the hc49/us. They are shown on the sparkfun website. They are the mid sized ones. >Also, would I need any caps with this? I use
2005-07-03 by Johnathan Corgan
I have an application where I need to use an ATmega8 port pin to apply bias current to a PIN diode RF switch. 10ma is all that's needed, which is no problem. However, the side of the RF switch that is being supplied current is connected to a mobile vehicle receiving antenna. My c
2005-07-03 by Pigeon
Interesting. So HC49 is the package/case type? I didn't see any hc49-hs on digikey.. just hc49 hc49/51 hc49/UA hc49/us like: http://rocky.digikey.com/WebLib/CTS/Web%20Data/MP%20Series.pdf Also, would I need any caps with this? Sorry, I have been reading a bunch on this.. and now
2005-07-03 by John Samperi
At 12:57 PM 3/07/2005, you wrote: >I would like something very accurate (so I can just keep using the same >setup over and over..) > If you don't use the internal oscillator and there is not lots of boards involved, then use a crystal for best results. Resonators are good if you
2005-07-03 by Pigeon
I would like something very accurate (so I can just keep using the same setup over and over..) I was thinking about using: http://www.sparkfun.com/datasheets/Components/Resonator-10MHz.pdf or something like that but from digikey Any ideas? thanks Lee
2005-07-03 by James Hatley
Yes, they exist in engineering samples ... pre-production is eminent. Jim ----- Original Message ----- From: "Don" To: Sent: Saturday, July 02, 2005 7:39 PM Subject: [AVR-Chat] 100 pin AVR's > Are these actually in the wild yet or just lab-rats? > > > > Yahoo! Groups Links > > >
2005-07-03 by Don
Are these actually in the wild yet or just lab-rats?
2005-07-02 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > > > > > > also how can i use the spm instruction to write one word > > > only in the flash mem. using the ATmega8515?? > > > > Reading the datasheet, perhaps? > > Specifically the SPM instruction. A careful reading of the pro
2005-07-02 by Dave VanHorn
> > > also how can i use the spm instruction to write one word > > only in the flash mem. using the ATmega8515?? > > Reading the datasheet, perhaps? Specifically the SPM instruction.
2005-07-02 by Mark Jordan
On 2 Jul 2005 at 2:03, M Habib wrote: > how can i excecute a program written on the sram using > AT90S8515 or ATmega8515? The AT90S8515 doesn't allow that. > also how can i use the spm instruction to write one word > only in the flash mem. using the ATmega8515?? Reading the datas
2005-07-02 by arhodes19044
Thanks for confirming my general approach. The devil is in the details, of course. I am surprised that there is no generic interrupt driven subroutinr and matching ISR. In its most generic form it would be quite functional and useful. So.... I will write it and post it! -Tony ---
2005-07-02 by M Habib
hi everybody how can i excecute a program written on the sram using AT90S8515 or ATmega8515? also how can i use the spm instruction to write one word only in the flash mem. using the ATmega8515?? thanx __________________________________________________ Do You Yahoo!? Tired of spa
2005-07-02 by wbounce
I know you go other responses but garbage on the uart could also mean wrong baud or corrupt fuse settings. -----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of aswinefy2003 Sent: Friday, July 01, 2005 7:35 AM To: AVR-Chat@yahoog
2005-07-01 by Robert Adsett
At 10:34 PM 7/1/05 +0200, Lasse Madsen wrote: >IAR s compiler also does this on the same line & so I think it has nothing >to do with hardware references but simply that it s a while without content > >---------- >From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] O
2005-07-01 by Lasse Madsen
IAR's compiler also does this on the same line . so I think it has nothing to do with hardware references but simply that it's a while without "content" Regars lasse _____ From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of arhodes19044 Sent: 1. juli 200
2005-07-01 by Johnathan Corgan
arhodes19044 wrote: > So, I think my strategy will be to create a buffer for the data in > RAM, then call a subroutine with the address of the data and the > sizeof the data. Then have that subroutine determine the location of > the EEPROM write, store those locations and length
2005-07-01 by Dave VanHorn
At 12:41 PM 7/1/2005, Ahmad El-Saied wrote: >can this be done using ATmega8515 ?? Could be, check the instruction set for the SPM (Store Program Memory) instruction.
2005-07-01 by Ahmad El-Saied
can this be done using ATmega8515 ?? --- Dave VanHorn wrote: --------------------------------- At 11:29 AM 7/1/2005, Ahmad El-Saied wrote: >hi all, > i would like to ask how to store byte (entered from >keypad) in the program memory (flash) in the AT90S8515 >Microcontroller ?? No