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2004-08-12 by Dave VanHorn
At 12:58 PM 8/12/2004, Daniel Boyer wrote: >Final update I just rewired the circuit as per everyone's instructions >and it works perfectly! Thanks to everyone, >Daniel >KC9DAG Post your final! :)
2004-08-12 by Daniel Boyer
Final update I just rewired the circuit as per everyone's instructions and it works perfectly! Thanks to everyone, Daniel KC9DAG
2004-08-12 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > At 01:36 PM 8/12/2004, Bruce Parham wrote: > > > >WTF! Who said anything about running it at 50 mA? I was using 10 mA as the example, that's 2x minimum for > >the LED and in limit for the AVR... > > The guaranteed full on cur
2004-08-12 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, "Daniel Boyer" wrote: > > > There isn't one. They are just IRleds, so as long as you have > > 2-3 volts across them, you'll be fine. > > Will 5V across them be okay, or do I need to do something to bring my 5v > down to around 3 just for the relay
2004-08-12 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, "Astria Nur Irfansyah" wrote: > I am not familiar with solid state relays. Btw, which is > more important: current or voltage? I mean, what are the > requirements in order to close a relay? Enough voltage? or > enough current? As far as i know, if
2004-08-12 by Dave Mucha
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > > > > >> An SSR may still have a coil, with a small relay activating a large > >> triac. > > > >Yikes! That's an interesting concept of "Solid State Relay" :-) > > The output is not mechanical contacts, and the relay provides
2004-08-12 by Daniel Boyer
> Another issue is switching speed; the specs list 3 mS max for > turn-on and > turn-off with typ turn-on times around 1 mS. How fast are you > trying to > switch the relay? A 10 mS pulse should do it but 100 uS will > never make it... I've got 3 second turn on's so the switching
2004-08-12 by Bruce Parham
Daniel Boyer wrote: > > > All of the SSRs I've ever used have a resistor, internally, > > in series with the LED and the input is rated by voltage or > > voltage range, i.e. 3-28V. Daniel, what > > is the input voltage and current requirements for the SSR you > > are using? > > F
2004-08-12 by Daniel Boyer
> There isn't one. They are just IRleds, so as long as you have > 2-3 volts across them, you'll be fine. Will 5V across them be okay, or do I need to do something to bring my 5v down to around 3 just for the relay?
2004-08-12 by Dave VanHorn
> I have looked over the >datasheet ( http://www.dpicts.com/Laa110.pdf ) many times and can not >find an input voltage anywhere. There isn't one. They are just IRleds, so as long as you have 2-3 volts across them, you'll be fine. From the spec, you may need anywhere from 5-50mA b
2004-08-12 by Daniel Boyer
> All of the SSRs I've ever used have a resistor, internally, > in series with the LED and the input is rated by voltage or > voltage range, i.e. 3-28V. Daniel, what > is the input voltage and current requirements for the SSR you > are using? First off the SSR that I am using is
2004-08-12 by Dave VanHorn
> >Just for interest, SSR's have been around for 25 years or so. (Think of them as >opto-isolators with industrial strength AC or DC outputs.) A real SSR uses an >LED to drive a photo transistor or diode on the output side. This opto link >provides the input/output isolation. (If
2004-08-12 by Bruce Parham
Bernd Felsche wrote: > > On Thursday 12 August 2004 11:00, Dave VanHorn wrote: > > At 09:57 PM 8/11/2004, kc9dag wrote: > > >> I think the problem is there are not enough current to > > >> drive the relay. > > > > > >oops, posted the wrong schematic... mine was still wrong, but I
2004-08-12 by Dave VanHorn
At 09:30 AM 8/12/2004, joseph torelli wrote: >I don't know if this will fit but google "uln28003a". This is a relay driver >chip. I has protection diodes built in. It can drive 8 relays or you can >parallel the output for higher current relays. You can control it right from >the
2004-08-12 by joseph torelli
I don't know if this will fit but google "uln28003a". This is a relay driver chip. I has protection diodes built in. It can drive 8 relays or you can parallel the output for higher current relays. You can control it right from the output pins of the micro. JoeT -----Original Mess
2004-08-12 by Paul Maddox
Daniel, > oops, posted the wrong schematic... mine was still wrong, but I did > have the transistor... The one I ment to post is > http://www.dpicts.com/Tiny15L-LaserDetector-2.jpg which has the > NPN, but I hooked up the transistor the way it is shown on page 3-2 > of the STK500
2004-08-12 by Paul Maddox
Daniel, > I was wondering if someone would mind looking at the > schematic (http://www.dpicts.com/Tiny15L-LaserDetector.jpg) and > telling me what I am doing wrong? Ok, do yourself a favour and save your AVR from going 'BANG'. Put a diode across the relay coil, the wrong way roun
2004-08-12 by Felicity & Bruce
Hi, I haven't played with VB but this may be worth looking at. The above dll will be created with a C++ mangled export and VB may not understand it. To create the entry point with a standard C name add a .def file to the link process. Put this line in the project options for the
2004-08-12 by Dave VanHorn
At 10:54 PM 8/11/2004, Astria Nur Irfansyah wrote: >I am not familiar with solid state relays. Btw, which is >more important: current or voltage? I mean, what are the >requirements in order to close a relay? Enough voltage? or >enough current? Current. Magnetic flux is amp-turns.
2004-08-12 by Astria Nur Irfansyah
I am not familiar with solid state relays. Btw, which is more important: current or voltage? I mean, what are the requirements in order to close a relay? Enough voltage? or enough current? As far as i know, if i want to buy a relay at my favorite store, they will ask: how many vo
2004-08-12 by Dave VanHorn
At 10:38 PM 8/11/2004, Jeffrey Engel wrote: >Dave, > >I'm sure you're right. >Didn't mean to spread any mis-information. Generally, you're right, but it pays to remember there are exceptions. :) Most relays are >10mA to pull in, and have coil voltages that would preclude the AVR'
2004-08-12 by Jeffrey Engel
Dave, I'm sure you're right. Didn't mean to spread any mis-information. Jeff Engel Arlington, TX --- Dave VanHorn wrote: > At 10:29 PM 8/11/2004, Jeffrey Engel wrote: > > >Daniel, > > > >The AVR can't drive the relay directly. You'll > need a > >transistor (or something) to handl
2004-08-12 by Dave VanHorn
At 10:29 PM 8/11/2004, Jeffrey Engel wrote: >Daniel, > >The AVR can't drive the relay directly. You'll need a >transistor (or something) to handle the current. Well, there are always exceptions. I've seen relays that close at
2004-08-12 by Jeffrey Engel
Daniel, The AVR can't drive the relay directly. You'll need a transistor (or something) to handle the current. Jeff Engel Arlington, TX --- kc9dag wrote: > I have designed a circuit that works fine when I run > it on the > STK500, but when I tried to move the circuit to its > own
2004-08-12 by Dave VanHorn
> >> An SSR may still have a coil, with a small relay activating a large >> triac. > >Yikes! That's an interesting concept of "Solid State Relay" :-) The output is not mechanical contacts, and the relay provides isolation. I've seen them, you can just barely hear the "click" if t
2004-08-12 by Bernd Felsche
On Thursday 12 August 2004 11:00, Dave VanHorn wrote: > At 09:57 PM 8/11/2004, kc9dag wrote: > >> I think the problem is there are not enough current to > >> drive the relay. > > > >oops, posted the wrong schematic... mine was still wrong, but I did > >have the transistor... The
2004-08-12 by Dave VanHorn
At 09:57 PM 8/11/2004, kc9dag wrote: >> I think the problem is there are not enough current to >> drive the relay. > >oops, posted the wrong schematic... mine was still wrong, but I did >have the transistor... The one I ment to post is >http://www.dpicts.com/Tiny15L-LaserDetector
2004-08-12 by Astria Nur Irfansyah
I think the problem is there are not enough current to drive the relay. As far as i know, a microcontroller i/o pin should not drive (source/sink) too much current. Maybe you should use a transistor as a switch to drive the relay, and control that transistor using your i/o pin. Y
2004-08-12 by Mike Murphree
On Aug 11, 2004, at 9:07 PM, kc9dag wrote: > I have designed a circuit that works fine when I run it on the > STK500, but when I tried to move the circuit to its own board (this > is the first time I have done an avr w/o using the STK500) it does > not work. I was wondering if so
2004-08-12 by techy fellow
Since you mentioned you are using a relay instead of a Led on your actual circuit, could it be, there is insufficient 'juice' to active the relay on your actual circuit ? kc9dag wrote: I have designed a circuit that works fine when I run it on the STK500, but when I tried to move
2004-08-12 by Dave VanHorn
At 09:07 PM 8/11/2004, kc9dag wrote: >I have designed a circuit that works fine when I run it on the >STK500, but when I tried to move the circuit to its own board (this >is the first time I have done an avr w/o using the STK500) it does >not work. I was wondering if someone woul
2004-08-12 by kc9dag
> I think the problem is there are not enough current to > drive the relay. oops, posted the wrong schematic... mine was still wrong, but I did have the transistor... The one I ment to post is http://www.dpicts.com/Tiny15L-LaserDetector-2.jpg which has the NPN, but I hooked up th
2004-08-12 by kc9dag
I have designed a circuit that works fine when I run it on the STK500, but when I tried to move the circuit to its own board (this is the first time I have done an avr w/o using the STK500) it does not work. I was wondering if someone would mind looking at the schematic (http://w
2004-08-11 by Robert Adsett
At 04:02 PM 8/11/04 -0700, you wrote: >i need to get every bit of every character and transfer it to the previous >character. nokia phones only need 7-bits for a character. the 8th bit is >taken from the next byte of the next character. for example in the first >element of a stri
2004-08-11 by jay marante
i need to get every bit of every character and transfer it to the previous character. nokia phones only need 7-bits for a character. the 8th bit is taken from the next byte of the next character. for example in the first element of a string, the 8th bit of is masked, 0x7F, and th
2004-08-11 by Robert Adsett
At 03:25 PM 8/11/04 -0700, you wrote: >sorry for the OT but i really have a hard time making this program run. im >new in VB. > >i have a code done in VB6. now, i want to manipulate every element >(character) of a string variable. i want to shift its bits to the left. my >profess
2004-08-11 by jay marante
sorry for the OT but i really have a hard time making this program run. im new in VB. i have a code done in VB6. now, i want to manipulate every element (character) of a string variable. i want to shift its bits to the left. my professor told me that it can't be done in VB, inste
2004-08-11 by Ionut Craoioveanu
hi i have a problem with a serial comunication on USART i need to use the multiprocessor mode but it doesn't work. the usart is set to give an interrupt, i'm using a 9bit frame, and the MPCM activated. the problem is that when i'm trying to comunicate with it ignores everything,
2004-08-10 by Mike Murphree
Graham Davies said: > Here is something I've learned by experience and verified with Atmel > support. If you have an AVR MCU that has JTAG support, you can get into > the device even if there is no MCU clock. You can't run and > debug a program, but you can get in to repair mis-s
2004-08-10 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Mike Murphree" wrote: > As a FPGA designer, this is not > surprising... One of the JTAG > signals *is* a clock ... That's true, but one of the signals of the other in-system programming interface (MOSI/MISO/SCK) is a clock too, so I don't think i
2004-08-10 by Graham Davies
Here is something I've learned by experience and verified with Atmel support. If you have an AVR MCU that has JTAG support, you can get into the device even if there is no MCU clock. You can't run and debug a program, but you can get in to repair mis-set clock selection fuses. Is
2004-08-09 by Brian Dean
On Mon, Aug 09, 2004 at 04:03:38AM -0500, Mike Murphree wrote: > I don't have FreeBSD at the moment, I gave up that partition to backup > my iTunes (15GB) library while I was switching to the PowerBook. I do > have Linux on the same computer as Windows is loaded and of course, Ma
2004-08-09 by Mike Murphree
On Aug 8, 2004, at 10:10 PM, Brian Dean wrote: > > This is very strange. Normally, if the programmer is not responding > at all, you'll see the error message: > > avrdude: serial_recv(): programmer is not responding > > This happens if a timeout occurs while waiting for a respons
2004-08-09 by Brian Dean
On Mon, Aug 09, 2004 at 01:46:10AM -0000, Mike wrote: > Okay, here you go: > > avrdude -p atmega169 -P com1 -c butterfly -v -v -v -v -U > flash:w:main.hex > > avrdude: Version 4.4.0 > Copyright (c) 2000-2004 Brian Dean, bsd@bsdhome.com > > System wide configuration file > is "C:\
2004-08-08 by Mike
--- In AVR-Chat@yahoogroups.com, Brian Dean wrote: > On Sat, Aug 07, 2004 at 03:47:42PM -0000, Mike wrote: > > > This is what it reports: > > > > avrdude: Version 4.4.0 > > Copyright (c) 2000-2004 Brian Dean, bsd@b... > > > > It was installed with the latest WinAVR package. > > T
2004-08-08 by Brian Dean
On Sat, Aug 07, 2004 at 03:47:42PM -0000, Mike wrote: > This is what it reports: > > avrdude: Version 4.4.0 > Copyright (c) 2000-2004 Brian Dean, bsd@bsdhome.com > > It was installed with the latest WinAVR package. Try adding '-v -v -v -v' to the AVRDUDE command line to enable lo
2004-08-08 by mpdickens
> I do not plan to have one CPU to search the whole 10Tb > I was planing on using 100 parallel CPU's each looking > after 100Gb of ram. Speaking from experience (In a past life, I configured and tuned IBM SP/2 machines...) a data set that is this large could only be processed usi
2004-08-07 by David VanHorn
Another useful tidbit, is to change it around a little, and have it pulse N times in ISR-X and N+1 times in ISR-Y. This way, you can see exactly which ISR is firing. Also, as you gain confidence in the code, take out the pulses on the active ISRs, but leave the pulses in for the
2004-08-07 by Robert Adsett
At 01:22 AM 8/7/04 -0300, you wrote: > Just to check it out... A free pin a 1K resistor and a 100nf cap to >ground. VCC at the junction is 100% of the time and vcc/2 is around 50%. >Sounds nice.... All the other times that I needed this I used a 32bit timer >summing up a cpu time
2004-08-07 by Bernd Felsche
On Saturday 07 August 2004 21:31, Graham Davies wrote: > --- In AVR-Chat@yahoogroups.com, Bernd Felsche wrote: > > Their minds [at the MIT AI Lab] > > may be too highly trained. > I hear you. And, so do they. The AI people are the most active in > cross-discipline brainstorming a