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2010-07-04 by Jim Wagner
On Jul 4, 2010, at 11:39 AM, Riccardo Castellani wrote: > I bought several books to learn to program my AT-MEGA8535 , but I > need C > compilator. > I'm going to use IAR but I'd like listening your suggestions with > advantages > and disadvantages. > > What compilator can you sug
2010-07-04 by Donald H
--- In AVR-Chat@yahoogroups.com, "Riccardo Castellani" wrote: > > I wish investing on my knowledge, so if you think Winavr is suitable for my > 2 projects I'll use it, otherwise I'll buy IAR because I don't want to study > winavr to replace it in the future with AIR. What do you
2010-07-04 by Riccardo Castellani
I bought several books to learn to program my AT-MEGA8535 , but I need C compilator. I'm going to use IAR but I'd like listening your suggestions with advantages and disadvantages. What compilator can you suggest me ? I wish to create 2 projects: 1. AUTOMATIC SPRINKLER TIME for m
2010-07-04 by Donald H
--- In AVR-Chat@yahoogroups.com, "Riccardo Castellani" wrote: > > I bought several books to learn to program my AT-MEGA8535 , but I need C > compilator. > I'm going to use IAR but I'd like listening your suggestions with advantages > and disadvantages. > > What compilator can you
2010-06-29 by anickol
--- In AVR-Chat@yahoogroups.com, "Riccardo Castellani" wrote: > > I'm going to create check system to look my garden by my webcam so hat I can connect to Internet by my cell and monitoring what happens. > Are you able to suggest me a similar project with atmega8535 ? > A good sit
2010-06-28 by wagnerj@proaxis.com
> I'm going to create check system to look my garden by my webcam so hat I > can connect to Internet by my cell and monitoring what happens. > Are you able to suggest me a similar project with atmega8535 ? > What do you expect your 8535 to do? Jim Wagner Oregon Research Electroni
2010-06-28 by Riccardo Castellani
I'm going to create check system to look my garden by my webcam so hat I can connect to Internet by my cell and monitoring what happens. Are you able to suggest me a similar project with atmega8535 ? [Non-text portions of this message have been removed]
2010-06-28 by Donald H
--- In AVR-Chat@yahoogroups.com, wagnerj@... wrote: > > > I'm going to create check system to look my garden by my webcam so hat I > > can connect to Internet by my cell and monitoring what happens. > > Are you able to suggest me a similar project with atmega8535 ? > > > > What d
2010-06-23 by Philippe Habib
How about using a separate power supply for the LEDs and some optoisolators between your processor and the LEDs. That way only the LEDs, and maybe some optos can get fried. I worked on some devices that were designed to take a hit from a patient being defrillated and keep on tick
2010-06-20 by D. Daniel McGlothin
> ... "Mealy, Moore, and xx" where, as I recall, "xx" was ... Maybe xx == Mary : http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.30.4168&rep=rep1&type=pdf xx == Harel : http://www.iar.com/website1/1.0.1.0/372/1/ or maybe not. Daniel
2010-06-20 by Steven Holder
Was it karnaugh mapping, this was a visual way of reducing the states/transitions of Mealy and Moore state machines, one is a function of it's outputs, the other is a function of the inputs and outputs i think !! lol _____ From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogrou
2010-06-20 by ecros_technology
--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" wrote: > > ... when I was getting my EE ... > ... I remember a class where we were > studying combinational logic, gate > reduction, etc. using, if I recall > correctly, "Mealy, Moore, and xx" > where, as I recall, "xx" was somethi
2010-06-19 by Jeff Blaine AC0C
They are tools for simplifying combinational logic. You started out with a set of equations describing what you wanted to build. And the tools helped you to turn the simultaneous equations into a solution. I think matrix tools were part of that but we are going WAY WAY back into
2010-06-19 by Zack Widup
Those names don't sound familiar. Do you recall what they were pertaining to? Zack On Sat, Jun 19, 2010 at 4:43 PM, Chuck Hackett wrote: > > > Here's a diversion from LEDs, Bus Drivers, etc. for a moment ... :-) > > A long time ago (never mind how long ago ) when I was getting my
2010-06-19 by Jim Wagner
The only thing I remember about is Quine-McClusky reduction algorithm and Karnaugh Mapping. Don't ask me how to use them! Jim Wagner Oregon Research Electronics On Jun 19, 2010, at 2:43 PM, Chuck Hackett wrote: > Here's a diversion from LEDs, Bus Drivers, etc. for a moment ... :-
2010-06-19 by Chuck Hackett
Here's a diversion from LEDs, Bus Drivers, etc. for a moment ... :-) A long time ago (never mind how long ago ) when I was getting my EE (Computer Design minor) at SUNY Buffalo I remember a class where we were studying combinational logic, gate reduction, etc. using, if I recall
2010-06-19 by hossein hashemi
also you are the first that pointed the distance problems & using of RS485,thanx, im thinking more about this project. thank Zack ________________________________ From: Zack Widup To: AVR-Chat@yahoogroups.com Sent: Sat, June 19, 2010 8:05:34 PM Subject: Re: [AVR-Chat] Re: ADM 485
2010-06-19 by hossein hashemi
thank Donald for links specially second. ________________________________ From: Donald H To: AVR-Chat@yahoogroups.com Sent: Sat, June 19, 2010 7:18:38 PM Subject: [AVR-Chat] Re: ADM 485 --- In AVR-Chat@yahoogroups.com, "hussein" wrote: > > hi dears > plz tell me how i connect a u
2010-06-19 by David Reaves
This is exactly the purpose logic opto-couplers ("opto-isolators") were invented for. Complete isolation, of several kV. You can buy them in SMD and DIP packages, in singles, dual and quad configurations. A couple dollars and you're safe. Very cheap insurance. David Reaves On Fri
2010-06-19 by Zack Widup
I discovered a long time ago that all you have to do is enter a part number into Google and it will come up with lots of data on many parts. And lots of suppliers in Hong Kong and China. :-) A lot of companies are now defunct and it's hard to find data sheets on their components
2010-06-19 by Dave McLaughlin
Hi Graham, Personally, I beg to differ on the distance. CAN has now been recognised for use in aviation and on large aircraft it is going to be some cable distance from some nodes. I have also successfully in the past run on an ROV umbilical of 1500m with albeit a slower bus rate
2010-06-19 by Donald H
--- In AVR-Chat@yahoogroups.com, "hussein" wrote: > > hi dears > plz tell me how i connect a uC to pc by ADM485 for a full duplex communication, > how i can set it to receive data or transmit? should i use 2 ADM485? > By your question, you have not looked at the data sheet for th
2010-06-19 by Dave McLaughlin
Hi Chuck, CAN bus is a great way to go with your project. Once you get over the hurdle of figuring out how the controller works then you won't go back to using the likes of RS485 again. :o) If you want to avoid having a microcontroller at your signal ends you could consider the M
2010-06-19 by ecros_technology
I've been following this thread, which started as a simple question about the safe current carrying capacity of input protection diodes and morphed into tales of lightning strikes damaging equipment, but now I have a question about the turn it is taking. TIA/EIA-485 was designed
2010-06-19 by Chuck Hackett
> From: Donald H > .... > At the tub was an LCD display and a few buttons that show the user what > was going on, at the equipment room (high voltage) were pumps, heaters, > blowers, relays for lights. > > .... > I asked if the two chips were side-by-side on the PCB. > > He proud
2010-06-19 by hossein hashemi
ok,thank Donald i need to study more about it.i subsituitly come here later. thank a lot.:) ________________________________ From: Donald H To: AVR-Chat@yahoogroups.com Sent: Sat, June 19, 2010 3:14:18 AM Subject: [AVR-Chat] Re: ATMega16 I/O port protection diodes About 20 years
2010-06-19 by hussein
hi dears plz tell me how i connect a uC to pc by ADM485 for a full duplex communication, how i can set it to receive data or transmit? should i use 2 ADM485?
2010-06-18 by Donald H
About 20 years ago I help a young guy design a Hot Tub controller. At the tub was an LCD display and a few buttons that show the user what was going on, at the equipment room (high voltage) were pumps, heaters, blowers, relays for lights. The guy wanted to use two 68hc05 controll
2010-06-18 by Chuck Hackett
Thanks for the feedback, my replies below: > From: wagnerj@proaxis.com > .... > Depending on where, in the world ... it could last a > long time as you propose, or it could be toast by this time next year. ... or, in Florida, the same time tomorrow! :-) This product is for the ou
2010-06-18 by Bob Paddock
> > > > This thread has been active for a while now. Although CRC is a > > superior checksum scheme, considering the effort this seems to be, I > > was curious why you specifically want a CRC checksum, as opposed to a > > simpler checksum scheme? > A checksum will have the same v
2010-06-17 by Philippe Habib
This has been active because I got pulled away from it for a while. Its kind of a back burner task for me. I did get back to it yesterday and here's what I found out. 1. I was not running the "slow" CRC twice with 0 to flush out the result. After doing this, I do compute a CRC th
2010-06-17 by David Kelly
On Thu, Jun 17, 2010 at 05:22:42PM +0200, Marc R.J. Brevoort wrote: > On Sun, 13 Jun 2010, Jim Wagner wrote: > > >> could it be a byte order problem in the computed CRC or the > >> polynomial? > > This thread has been active for a while now. Although CRC is a > superior checksum
2010-06-17 by Marc R.J. Brevoort
On Sun, 13 Jun 2010, Jim Wagner wrote: >> could it be a byte order problem in the computed CRC or the >> polynomial? > might be! > Jim Wagner This thread has been active for a while now. Although CRC is a superior checksum scheme, considering the effort this seems to be, I was cu
2010-06-17 by Tim Mitchell
----Original Message---- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Mike Bronosky Sent: 17 June 2010 15:31 To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Re: ATMega16 I/O port protection diodes > > One sure fire way we over come this is th
2010-06-17 by Mike Bronosky
Like Jim pointed out, on outdoor runs lighting is a problem, especially when it comes to devices that can only withstand very small voltages. About 20 years ago where I worked we had two buildings located about 3000 feet apart on our facility. The Northern Telcom phone system, ca
2010-06-17 by David Kelly
On Thu, Jun 17, 2010 at 07:52:49AM -0600, David VanHorn wrote: > > The ATMega16's datasheet shows that the I/O pins have diodes from > > the pin to Gnd and Vcc. ?These would seem to protect the pin from > > surge voltages less than Gnd or greater than Vcc but I do not see > > any
2010-06-17 by David VanHorn
> The ATMega16's datasheet shows that the I/O pins have diodes from the pin to > Gnd and Vcc. These would seem to protect the pin from surge voltages less > than Gnd or greater than Vcc but I do not see any specification as to what > the max current capability of these diodes is.
2010-06-17 by Donald H
--- In AVR-Chat@yahoogroups.com, "Tim Mitchell" wrote: > > ----Original Message---- > From: AVR-Chat@yahoogroups.com > [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Mike > Bronosky Sent: 17 June 2010 15:31 To: > AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Re: > ATMega16 I/O
2010-06-17 by Zack Widup
Electronics engineers who are also geophysicists know about it! :-) Zack On Thu, Jun 17, 2010 at 2:20 AM, anickol wrote: > > > > > > Depending on where, in the world, this is being installed, it could > > last a long time as you propose, or it could be toast by this time > > next
2010-06-17 by anickol
> Depending on where, in the world, this is being installed, it could > last a long time as you propose, or it could be toast by this time > next year. This is the true statement, precisely describing the situation. > It took > several years of sleuthing to figure out that near-b
2010-06-16 by wagnerj@proaxis.com
> Background: > > I am considering driving LEDs directly from the ATMega16 I/O pin (current > sink mode) to avoid having to use an additional driver chip, however, the > LEDs are located as much as 800 feet from the ATMega16 on an outdoor > buried > CAT-5 cable (long story). > >
2010-06-16 by Chuck Hackett
Background: I am considering driving LEDs directly from the ATMega16 I/O pin (current sink mode) to avoid having to use an additional driver chip, however, the LEDs are located as much as 800 feet from the ATMega16 on an outdoor buried CAT-5 cable (long story). The max current ra
2010-06-14 by Jim Wagner
might be! Jim Wagner On Jun 13, 2010, at 9:04 PM, stevec wrote: > > could it be a byte order problem in the computed CRC or the > polynomial? > > --- In AVR-Chat@yahoogroups.com, Dede wrote: > > > > > > J > > > > > > ----- Original Message ----- > > From: wagnerj@... > > Sent: 05
2010-06-14 by Dede
J ----- Original Message ----- From: wagnerj@proaxis.com Sent: 05 May 2010 11:13 To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] CRC using IAR compiler > I'm using the IAR compiler V5.11 or 5.12 and need to use the feature > that has the linker write a CRC in the last two by
2010-06-14 by stevec
could it be a byte order problem in the computed CRC or the polynomial? --- In AVR-Chat@yahoogroups.com, Dede wrote: > > > J > > > ----- Original Message ----- > From: wagnerj@... > Sent: 05 May 2010 11:13 > To: AVR-Chat@yahoogroups.com > Subject: Re: [AVR-Chat] CRC using IAR com
2010-06-14 by stevec
could it be a byte order problem in the computed CRC or the polynomial? --- In AVR-Chat@yahoogroups.com, Dede wrote: > > > J > > > ----- Original Message ----- > From: wagnerj@... > Sent: 05 May 2010 11:13 > To: AVR-Chat@yahoogroups.com > Subject: Re: [AVR-Chat] CRC using IAR com
2010-06-08 by dlc
Hey guys, I can find the avr-eclipse project on source forge but I can't download it and Eclipse can't find the plugin from the "add software" button either. Has avr-eclipse plugin become abandonware? I sure HOPE not! thanks, DLC -- -----------------------------------------------
2010-06-08 by Cat C
Like in a (linked) list you may have extra bytes with info. > To: AVR-Chat@yahoogroups.com > From: microbrix@gmail.com > Date: Mon, 7 Jun 2010 19:03:37 -0600 > Subject: Re: [AVR-Chat] Bit fields > > > 3. When a packet comes, decrease counter IF it goes into empty (zero) position,
2010-06-08 by David Kelly
On Jun 7, 2010, at 4:25 PM, David VanHorn wrote: > I have an application that needs to receive a variable number of > packets in a block of data. > I store them into a block-sized array with a packet-sized offset > multiplied by the packet number.. > I need to know when I've rece
2010-06-08 by Dave McLaughlin
Damn!! I didn't scroll down far enough from your initial message!! Same idea I thought of but reversed bit state!! From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of David VanHorn Sent: 08 June 2010 08:07 To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-C