Yahoo Groups archive
Messages
Page 95 of 307 · 15341 messages matched
2008-01-08 by Philippe Habib
Can you substitute your contactors with zero crossing solid state relays? -----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Roy E. Burrage Sent: Tuesday, January 08, 2008 3:26 AM To: AVR-Chat@yahoogroups.com Subject: Re: [AVR
2008-01-08 by Roy E. Burrage
Is this for your model railroad Chuck? If so, that isn't a hobby...it's an obsession. REB Chuck Hackett wrote: >Gentlemen, > >I am looking for an RTOS to "standardize" on in my (hobby) work with AVRs. > >I would like to find an RTS that is "full-featured" with things like tracing
2008-01-08 by AVR-Chat@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the AVR-Chat group. File : /Opto-Triac.gif Uploaded by : enkitec Description : Optocoupler driving a TRIAC You can access this file at the URL: http://groups.yahoo.com/g
2008-01-08 by Roy E. Burrage
MOC3020 is that part number Behrooz. You should be able to find it with a google search. We also use MOC3040 optocouplers here. They incorporate a zero-crossing circuit to reduce noise. The MOC3020 may also do this. REB Behrooz wrote: >Enki, please send your file moc3020.gif to "
2008-01-08 by Behrooz
Got It in my mailbox. Tnx --- In AVR-Chat@yahoogroups.com, "Behrooz" wrote: > > Enki, please send your file moc3020.gif to "Files" section of Yahoo! > Group. No link is provided so I didn't receive it. > > Tnx, > Behrooz > --- In AVR-Chat@yahoogroups.com, "Enki" wrote: > > > > >
2008-01-08 by Behrooz
Enki, please send your file moc3020.gif to "Files" section of Yahoo! Group. No link is provided so I didn't receive it. Tnx, Behrooz --- In AVR-Chat@yahoogroups.com, "Enki" wrote: > > > > > On 8 Jan 2008 at 14:14, Behrooz wrote: > > > I think you are right, even with no power on
2008-01-08 by Enki
On 8 Jan 2008 at 14:14, Behrooz wrote: > I think you are right, even with no power on contactors (just relays > are on) the same problem occures time to time. > > May you send me a schematic (or web link) on using optocouplers > along with TRIACs on AVR output pins? Am amazed wit
2008-01-08 by maria mastik
Hi Simply connect a 1uF 600V (or 400V) ceramic capasitor in parallel with the input chock of each contactor (if you have more than one); this will eleminate the problem compleately. anothe way is to connect a 670 Ohm resistor with the capasitor in series and then connect thease i
2008-01-08 by Behrooz
In my previous attempt (and research) I did exactly what you recommend and it worked good (big 105 400V caps). However, in the final package of the device, I surprisingly found the 'traces' of the same old symptom. By the way, my 1/2 watt carbon resistors make smoke and burn! Any
2008-01-08 by Behrooz
I think you are right, even with no power on contactors (just relays are on) the same problem occures time to time. May you send me a schematic (or web link) on using optocouplers along with TRIACs on AVR output pins? Am amazed with this optocoupler part. Seems interesting, and m
2008-01-08 by Enki
On 8 Jan 2008 at 6:25, Roy E. Burrage wrote: > 6. Have you thought about your 5 volt relay contacts? It might be a > good idea to put RC snubbers across these too. I'd use TRIACs with optocouplers here. Snubbers across the TRIACs, of course. Relay coils on the +5V line is not a g
2008-01-08 by Roy E. Burrage
Behrooz, The problem with rfi/emi is that it's more of an art than a science. Not only do you have a static (voltage) component, but you also have a magnetic component...there is conducted and radiated component. The noise generated is also broad band, which means it has frequenc
2008-01-08 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "k5atm" wrote: > I purchased a Butterfly ... am a > bit confused ... the RISP cannot > detect if the host (Butterfly) > has power ... The Butterfly does not provide power at the ISP connector. Yes, this is to protect the Butterfly's battery, which
2008-01-08 by Leon
----- Original Message ----- From: "behrooz_hariri" To: Sent: Tuesday, January 08, 2008 9:53 AM Subject: [AVR-Chat] Dealing with 3-phase contactor sparks - Practical approach > > Problem: > > Industrial contactors make such a high noise (surge) that occasionally > cause these sym
2008-01-08 by behrooz_hariri
Problem: Industrial contactors make such a high noise (surge) that occasionally cause these symptoms on AVR MCU : 1- LCD blink, unrecognized characters 2- Flash rom bitmap change 3- EEPROM change or erasure Explanation: My atmega16, controls 3-phase contactors through 5V relays w
2008-01-08 by John Samperi
At 04:03 PM 8/01/2008, you wrote: >Apparently the RISP cannot detect if the host (Butterfly) >has power -- a feature to protect the Butterfly's battery? If you have an AVRISP MK2, the REAL Atmel unit, ISP should work provided that the Butterfly's battery is in good condition. Reg
2008-01-08 by k5atm
I am new to the world of Atmel chips. I am a long time PIC programmer looking to expand my horizons. I purchased a Butterfly with a specific project in mind but I am a bit confused and looking through the archives did not help much. I am using AVR Studio 4.13 and WinAVR. I would
2008-01-08 by Chuck Hackett
Gentlemen, I am looking for an RTOS to "standardize" on in my (hobby) work with AVRs. I would like to find an RTS that is "full-featured" with things like tracing (to a serial port, etc.), inter-task messaging/signaling, etc. It would be nice if features were optionally compiled/
2008-01-07 by Dennis Dunn
Hello, At 09:40 AM 7/01/2008, you wrote: >I'm using AVR Studio on a Windows XP box. >The message you are getting is strange. If Studio doe not >find >the STK00 you will get a window "Connect Fail-Select >AVR >programmer". >Do you get this window? Are you using Tools>Program >AVR>
2008-01-07 by Manne Tallmarken
I have some problems with finding i well designed metall project box. I am looking for a box similar to http://www.ntt.dk/GH4%20EX%202005_dk%20brochure.pdf . That said, I am looking for a stainless box with a few connectors and mounting holes, around 13 x 7 x 2.4 cm. Any suggesti
2008-01-07 by dlc
Erik, Every site refers back to the savanna site. I have found no independent file anywhere. I have discovered that my Mac HTML tools are probably interpreting the files wrong, going to command line and doing it manually got it to work. Other kind souls have also helped. thanks,
2008-01-07 by erikc
Have you tried downloading from a different site? dlc wrote: > Hi all, > > I've tried to download avr-libc doc files from : > http://download.savannah.gnu.org/releases/avr-libc/ > and every file type that I've tried to get, tar, PDF, whatever, has been > corrupt and can't be unta
2008-01-07 by dlc
Hi all, I've tried to download avr-libc doc files from : http://download.savannah.gnu.org/releases/avr-libc/ and every file type that I've tried to get, tar, PDF, whatever, has been corrupt and can't be untar'd or read by their supposed formats. Is there something I'm missing abo
2008-01-07 by John Samperi
At 09:40 AM 7/01/2008, you wrote: >I'm using AVR Studio on a Windows XP box. The message you are getting is strange. If Studio doe not find the STK00 you will get a window "Connect Fail-Select AVR programmer". Do you get this window? Are you using Tools>Program AVR>Connect ?? Reg
2008-01-07 by John
Are you referring to using the optos as input buffers or output drivers? Not all optos are created equally. I use MCT9001 type optos - a simple diode input and an open collector output. The power consumption is a function of input and output impedences, with the MCT9001 (or simil
2008-01-06 by Dennis Dunn
Hi John, >Which programming software are you using again? I'm using AVR Studio on a Windows XP box. I've also tried it using the GNU tool chain, avr-gcc, on a box running Ubuntu Linux. Both of these boxes are using RS-232 serial ports, not USB ports. Everything I've read is that
2008-01-06 by John Samperi
At 08:16 AM 7/01/2008, you wrote: >5. Is there just a typical "cover-all-cases" value of these series resistors >that everyone uses? I wish I knew the answers to all those questions!! Basically, I try not to use the JTAG pins for anything else if I can help it. Very wasteful! Rem
2008-01-06 by Steven Hodge
I have the Atmel JTAG ICE mkII and I've read the documentation on it (including as I discovered going back to v1 doc's for more complete info). It's clear from the documentation that when the JTAG interface is enabled, "the JTAG pins cannot be used for alternative pin functions",
2008-01-06 by Steven Hodge
Thanks for the various thoughts. I'm pursuing various leads people have given me. One lead I'm not pursuing, however, is optocouplers simply because of the power needed to run them (one optocoupler can easily be the same or more than the uC). I have the Circuit Cellar article on
2008-01-06 by Brian
--- In AVR-Chat@yahoogroups.com, Tom wrote: > > Brian wrote: > > > > My cd cracked for programming and customizing the avr. does someone > > have a copy I can have or upload it to a ftp site. I can send you my > > bad disk as proof of ownership. I have also asked this on the AVR
2008-01-06 by dlc
I'm going to reply to my own post. I found the offending area in the configure script that just REFUSED to find avr-gcc and insisted on using /usr/bin/gcc which is the Apple gcc. If I could have found a way to set the env var CC I could have overridden it, but I couldn't figure o
2008-01-06 by dlc
Hi all, I'm _trying_ to get the latest AVR toolset on my Mac. I'm using various people's ways to get the Macport AVR toolset. avr-binutils and avr-gcc come down and install just fine (avr-gcc 4.0.2), but trying to bring in the Macport of avr-libc is totally failing, it keeps comp
2008-01-05 by John Samperi
At 11:11 PM 4/01/2008, you wrote: >Yep. Got the same type of error message "programmer not found." Which programming software are you using again? Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hil
2008-01-05 by Tom
Brian wrote: > > My cd cracked for programming and customizing the avr. does someone > have a copy I can have or upload it to a ftp site. I can send you my > bad disk as proof of ownership. I have also asked this on the AVR > Freeks website. > What CD? AVRStudio? You can download
2008-01-05 by Brian
My cd cracked for programming and customizing the avr. does someone have a copy I can have or upload it to a ftp site. I can send you my bad disk as proof of ownership. I have also asked this on the AVR Freeks website. Thanks, Brian
2008-01-05 by Philippe Habib
I've had such mixed results from USB/serial dongles that I avoid them as much as I can. Maybe you can try on a computer with a real serial port to rule that out? On Jan 5, 2008, at 8:21 AM, Zack Widup wrote: > > Hmm ... how odd. I've been running AVR Studio with my STK500 on > ab
2008-01-05 by Zack Widup
Hmm ... how odd. I've been running AVR Studio with my STK500 on about six different computers running everything from Windows 98 to XP (no Vista here yet), both desktops and laptops, and they all work fine. All have serial ports, though. I haven't tried a USB-to-serial adaptor ye
2008-01-04 by Philippe Habib
You want to think in layers of protection. Diodes or surge protectors, then gas discharge tubes for the really big zaps. One issue I've run into is that as the isolation provided by optocouplers increases, they get way slower. I've had to bit bang some SPI interfaces down at the
2008-01-04 by Dennis Dunn
Hi, >Do you have the 8515 in the correct socket (A3 vs D3)? Steve The target was in the right socket. Even if it wasn't I would expect the programmer to send some sort of message to the software about that, not that the software can't find the programmer. I haven't read any messa
2008-01-04 by Dennis Dunn
Hi, >I'm not sure the "Default" is what you want, I would go through each jumper and see what it does. Yeah, did that. The jumpers basically set the programming mode (normal ISP vs hi-voltage) and things like supply voltage for the target. --dennis _______________________________
2008-01-04 by Dennis Dunn
>Did you try updating the firmware in the STK-500? Yep. Got the same type of error message "programmer not found." --dennis ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Sear
2008-01-04 by Bruno
Hi Steven. About the I/O lines, i've never heard about the littlefuse. Didn't you think to use optocouplers? Like the TIL111. About the RS-485, you could put some passives components plus the LTC1480 transceivers. On the magazine, Circuit Cellar, the october issue an article came
2008-01-03 by Steven Hodge
Do you have the 8515 in the correct socket (A3 vs D3)? Steve [Non-text portions of this message have been removed]
2008-01-03 by James Wagner
On Jan 3, 2008, at 11:39 AM, Steven Hodge wrote: > My apologies ahead of time for the length of this post, but I > realize it > would be hard to answer without adequately describing the operating > environment. > > I'd like to get feedback on ideas I have to provide protection fo
2008-01-03 by Cat C
I'm not sure the "Default" is what you want, I would go through each jumper and see what it does. Cat
2008-01-03 by Steven Hodge
My apologies ahead of time for the length of this post, but I realize it would be hard to answer without adequately describing the operating environment. I'd like to get feedback on ideas I have to provide protection for I/O lines for uC-based PCB's. These will be scattered throu
2008-01-03 by Zack Widup
Hi Dennis, Did you try updating the firmware in the STK-500? Zack On Thu, 3 Jan 2008, Dennis Dunn wrote: > Hello, > > I am trying to help my nephew with a problem he is having with his stk500 starter kit. When using AVR Studio he was unable to program the included 8515 chip, the
2008-01-03 by Dennis Dunn
Hello, I am trying to help my nephew with a problem he is having with his stk500 starter kit. When using AVR Studio he was unable to program the included 8515 chip, the connection always failed. He was using the db-9 cable that came with the kit hooked up to the RS-232 CTRL port.
2008-01-02 by Tom Becker
> ... http://www.mstarmetro.net/~rlowens/OpticalMouse/ Yup, a good link. It lacks any concrete information on the Philips PLN-2020 - and nothing seems to be publicly available from them (consistent with my experience with Philips, which doesn't respond to tech requests), hence an
2008-01-01 by emersonmi2004
did not find your part yet but did fing this interesting link http://www.mstarmetro.net/~rlowens/OpticalMouse/ still looking mj --- In AVR-Chat@yahoogroups.com, "Tom Becker" wrote: > > Folks, I thought I had the tool to identify this part but, alas, I > cannot find it nor relocat