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2010-11-10 by Dave McLaughlin
Hi Chuck, Actually, if you can work out the registers and what you need to get CAN working on the likes of the AT90CAN devices, you don't have to worry about the arbitration or any message handling other than sticking bytes in the transmit registers and initiating the transmissio
2010-11-10 by Chuck Hackett
> From: Alex Shepherd > > Hi Chuck, > > > - The data bus is pseudo-CAN. I use a CAN driver but I'll be doing the > > beginning-of-message bus arbitration by bit-banging (PD2, PD3) and then > > switch to the USART for actual data transfer. In the future I hope to > switch > > to a
2010-11-09 by David Kelly
On Tue, Nov 09, 2010 at 09:06:46PM -0000, ecros_technology wrote: > --- In AVR-Chat@yahoogroups.com, "Frank P" wrote: > > > > I ... was wondering where everyone else buys their LCDs? > > You write that you are "just starting with AVRs". What development > hardware do you have? Ma
2010-11-09 by ecros_technology
--- In AVR-Chat@yahoogroups.com, "Frank P" wrote: > > I ... was wondering where everyone > else buys their LCDs? You write that you are "just starting with AVRs". What development hardware do you have? Many people start with the AVR Dragon, which has on-chip debug capability as w
2010-11-09 by tim gilbert
Frank, We buy almost all of ours from www.crystalfontz.com Do you need a prototype board to go with it? Tim Gilbert JEM Innovation Inc. 303-926-9053 (office) 303-437-4342 (cell) 720-890-8582 (fax) www.jeminnovation.com www.pdksolutions.com ----- Original Message ----- From: Frank
2010-11-09 by Zack Widup
I usually pick them up on eBay. There are some really good deals now and then. Zack On Tue, Nov 9, 2010 at 10:46 AM, Frank P wrote: > > > I have been looking at LCD displays and was wondering where everyone else > buys their LCDs? > > At this point, I am just starting with AVRs s
2010-11-09 by Frank P
I have been looking at LCD displays and was wondering where everyone else buys their LCDs? At this point, I am just starting with AVRs so I would like to have something that gives me some output (maybe 16 X 2). Any suggestions are welcome... Thanks. Frank P.
2010-11-09 by Dave McLaughlin
Don't even try to attempt gluing boards together as this is far more hassle than having a board house do 4 layer board for you. There is also the hassle of trying to do this in your software. You effectively have 3 PCB designs. As I said, not recommended. Looking at the website,
2010-11-09 by Robert Adsett
On 11/8/2010 11:30 AM, Chuck Hackett wrote: >> -----Original Message----- >> From: Geo >> >> I have had a quick look - might be easier to post the actual board files >> as I could not switch off layers in the pdf to see things more clearly. > > Yup, It would be lots easier to see
2010-11-08 by Alex Shepherd
Hi Chuck, > - The data bus is pseudo-CAN. I use a CAN driver but I'll be doing the > beginning-of-message bus arbitration by bit-banging (PD2, PD3) and then > switch to the USART for actual data transfer. In the future I hope to switch > to a AT90CAN128 (built-in CAN support) but
2010-11-08 by Chuck Hackett
Gentlemen: Thank you very much for the feedback it has been very helpful. I appreciate you taking the time to comment. I have waited a bit to reply so that I could digest the comments and combine replies into this single message, see individual replies below. (question: Do member
2010-11-08 by David Kelly
On Nov 8, 2010, at 1:04 AM, Dave McLaughlin wrote: > Professional boards are not that expensive with a number of companies > offering a 1 or 2 off service at a very competitive price. www.ezpcb.com is > one and then there is www.pcb123.com. I have been pleased with PCBFabExpress.
2010-11-08 by Dave McLaughlin
Hi Chuck, Based on Roberts suggestion on vias, if you go for getting a professional board made up, you can have it soldermasked and avoid the via shorting issues, but you need to make sure the vias are tented (cover with soldermask) so need to check how Eagle does this. Professio
2010-11-08 by Robert Adsett
On 11/6/2010 11:54 AM, Chuck Hackett wrote: > I know this is dangerous, but ... :-) > > I'm looking for a critique of the board layout for my first significant project. > A few suggestions - Consider adding power and ground planes. It frees up your available routing space conside
2010-11-08 by Dave McLaughlin
Hi Chuck, You need to put 1 decoupling cap per VCC pin on the device, as close to each pin as possible. I would also consider putting a small 0805 inductor between the VCC and AVCC to reduce noise at this input. Also put a 0.1uF decoupling at this pin too. AREF can be fed from th
2010-11-07 by David Kelly
On Nov 7, 2010, at 6:02 AM, ecros_technology wrote: > --- In AVR-Chat@yahoogroups.com, David Kelly wrote: > >> ... You have to have the ISP to >> put the chip in JTAG mode. > > This is not true. The ATmega32A will program and debug at the JTAG interface as delivered by Atmel. So
2010-11-07 by ecros_technology
--- In AVR-Chat@yahoogroups.com, David Kelly wrote: > ... You have to have the ISP to > put the chip in JTAG mode. This is not true. The ATmega32A will program and debug at the JTAG interface as delivered by Atmel. So will all the other JTAG-capable devices of which I am aware. J
2010-11-07 by David Kelly
On Nov 6, 2010, at 10:54 AM, Chuck Hackett wrote: > I know this is dangerous, but ... :-) > > I'm looking for a critique of the board layout for my first significant project. In addition to the other excellent suggestions I'm concerned about how close you have placed traces to th
2010-11-06 by n1ist
On the schematic: - The 7805 wants a ceramic cap (100-330nF) on the input side to reduce the chance of oscillating - The general rule of thumb is one 100nF bypass cap per power pin on each IC - Aref should be connected to a 100nF cap to ground, not Vcc - Stylistic note - you shou
2010-11-06 by Geo
Chuck Hackett wrote: > I know this is dangerous, but ... :-) > > I'm looking for a critique of the board layout for my first significant project. > I have had a quick look - might be easier to post the actual board files as I could not switch off layers in the pdf to see things m
2010-11-06 by Chuck Hackett
I know this is dangerous, but ... :-) I'm looking for a critique of the board layout for my first significant project. This board is designed to control signals for outdoor ride-on railroads (which I think I've spoken about here before). The board senses track voltages and drives
2010-10-25 by Philippe Habib
Thank you for the response. I wound up finding a $10 player that takes an SD card and uses serial commands to play back any track on demand. Since I only need a very low number of these, this is a better solution than anything that requires work on my part. _____ From: AVR-Chat@y
2010-10-12 by Terrance
Thanks Don, that should keep me supplied until my usual sources are back. --- In AVR-Chat@yahoogroups.com, "Don Kinzer" wrote: > > --- In AVR-Chat@yahoogroups.com, "Terrance" wrote: > >ATMEGA168 (all 28pin DIP models) seem to have dried up as well. > Mouser has over 2600 pieces i
2010-10-11 by Gary Skinner
This is from section 22.5 of the megaXX4 data sheet: When using Differential mode, along with Auto Trigging from a source other than the ADC Conversion Complete, each conversion will require 25 ADC clocks. This is because the ADC must be disabled and re-enabled after every conver
2010-10-10 by Philippe Habib
Thank you. That vmusic thing looks like a nice way to add features without too much work. After not finding what I wanted, I stumbled into just what I was hoping for. For only $10, I'll get one and play with it. Here's the one I ran into. http://mdfly.com/Download/Module/AU5121Ss
2010-10-10 by John Samperi
At 02:43 AM 11/10/2010, you wrote: >I'm working on a project that requires several minutes of good quality sound >playback. I use a Vmusic module that plays MP3 with a custom board we make which includes a 20W amplifier. Regards John Samperi **************************************
2010-10-10 by enkitec@gmail.com
On 10-Oct-10 14:06, gm4xus wrote: > I have a high frequency signal (about 7-8 MHz) which is modulated by on/off switching. > To recover the modulation - to feed into an AVR (probably ATTiny) - I could use a retriggerable monostable e.g. 74123 timed such that it remained tripped w
2010-10-10 by Ali Reza Semnani
hi dear philippe for the first way you can simply use any VLSI chips to play your files ( or record perhaps ), its very simple & cheap way to solve this problem, this chips already used in portable media players & can handle mp3, wma, wav, midi, oog vorbis ...etc files. you can u
2010-10-10 by Philippe Habib
I'm working on a project that requires several minutes of good quality sound playback. The ideal thing would be to control an Ipod or similar player. A device that can store up to about 12 sound clips of up to about a minute each is what's desired. The sound quality desired is ab
2010-10-10 by gm4xus
I have a high frequency signal (about 7-8 MHz) which is modulated by on/off switching. To recover the modulation - to feed into an AVR (probably ATTiny) - I could use a retriggerable monostable e.g. 74123 timed such that it remained tripped while carrier present but flopped back
2010-10-10 by Mark Nowell
> I don't know the tin84 specifically, but the mega164 needs to have the ADC turned off and restarted every sample to get valid readings. I'm using free-running ADC conversion so this would definitely affect me if it is a problem with the Tiny84. There's nothing in the errata, bu
2010-10-09 by Robert Adsett
On 10/9/2010 10:46 AM, englsprogeny1 wrote: >I > remember buying a lot of ATMEGA8s about two years ago on Ebay where > the effective cost (after shipping and handling) was $1.50 per > processor!!!! > > Now it will cost (effectively (after shipping) )between $5 and $10 > per ATMEG
2010-10-09 by Gary Skinner
I don't know the tin84 specifically, but the mega164 needs to have the ADC turned off and restarted every sample to get valid readings. Gary Skinner [Non-text portions of this message have been removed]
2010-10-09 by englsprogeny1
AVR's can be purchased (if you can find the specific one you are looking for). Unfortunately, the price has significantly jumped. I remember buying a lot of ATMEGA8s about two years ago on Ebay where the effective cost (after shipping and handling) was $1.50 per processor!!!! Now
2010-10-08 by Steve Hodge
>. ditto for the ATmega328. But it looks like only in DIP package. I'm still looking for it in -AU package. My searching over the past few days seems to indicate that DIP packages of various uC's are more readily available than SMT, presumably because they are less in demand. Ste
2010-10-08 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Steve Hodge" wrote: >>ditto for the ATmega328. > But it looks like only in DIP package. Correct. That response was in reply to Terrance who was looking for the mega168 in the DIP-20 package. >I'm still looking for it in -AU package. How many do y
2010-10-08 by Mark Nowell
Is anyone here familiar with the Tiny ADC in this mode? I'm using ADC0/1 in differential mode with ADC0 tied to an external Vref of ~2V and ADC1 variable either side of this, 5V rail. If I remove the bipolar (BIN) bit I get what I'd expect which is roughly 5mV/bit when +ve, and 0
2010-10-08 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Terrance" wrote: >ATMEGA168 (all 28pin DIP models) seem to have dried up as well. Mouser has over 2600 pieces in stock of the ATmega168P-PU. This is a direct replacement for the ATmega168-20PU. When you're searching for parts, also look for the A
2010-10-08 by Terrance
ATMEGA168 (all 28pin DIP models) seem to have dried up as well. Sucks for me! 88's are still around, how much more can I optimize my code? --- In AVR-Chat@yahoogroups.com, "Steve Hodge" wrote: > > Well I thought they would have even fewer in stock because I had ordered > some. Ho
2010-10-07 by Steve Hodge
Well I thought they would have even fewer in stock because I had ordered some. However, I just rec'd this email from them: "Steve, We have received an order ahead of yours for item # ATMEGA328P-AU, we are sold out. We are unable to keep them on order as we are not franchised with
2010-10-07 by Brewski
> cout } > cout return 0; Thanks, Mike Bronosky
2010-10-07 by Brewski
I'm trying to send a character array to an LCD display and am having problems. An individual character works but the array does not. Here is what I have tried out trying to find the problem. Given the following C++ and C code on a Ubuntu computer using the GNU C++ and AVR GCC com
2010-10-07 by David VanHorn
>> > Unbelievably baroque architecture from the 1960s/1970s. "Baroque" as in a funny way to spell "Broke"? :) Procrustean is a term I've used for it, though that doesn't quite fit either.
2010-10-07 by Bob Paddock
On Wed, Oct 6, 2010 at 7:17 AM, Leon Heller wrote: > > > > On 06/10/2010 04:52, erikc wrote: > > > Unbelievably baroque architecture from the 1960s/1970s. Rumour has it > > that the original "PIC" was a "Peripheral Interface Controller" (that > > General Instruments, later Microc
2010-10-07 by Steve Hodge
Great, thanks for that tip too. From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Don Kinzer Sent: Wednesday, October 06, 2010 4:57 PM To: AVR-Chat@yahoogroups.com Subject: [AVR-Chat] Re: Shortage of parts --- In AVR-Chat@yahoogroups.com , "Steve Hodge
2010-10-06 by Steve Hodge
Thanks for the lead on online components. They have even fewer in stock now. I always forget to look separately at online. They don't seem to ever show up in FindChips, etc. Steve From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Don Kinzer Sent: Wedne
2010-10-06 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Steve Hodge" wrote: > Thanks for the lead on online components. Another source to keep on your list is AIR Electronics in Germany (http://www.trade-shop.de/catalog/). They don't have any mega328P in stock now. I have, however, purchased mega644 c
2010-10-06 by Leon Heller
On 06/10/2010 19:33, Don Kinzer wrote: > > > --- In AVR-Chat@yahoogroups.com, "Steve Hodge" wrote: >> I sure can't find Atmega328P's in stock anywhere >> (in TQFP package). > The Atmel stock checker shows that Arrow has over 1000 in stock. > http://www.stkcheck.com/evs/atmel/atme
2010-10-06 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, Leon Heller wrote: > They are virtually unobtainable in any package. Farnell indicates that they have 113 TQFP parts in their Asian warehouse but I don't see a way to order them. I sent Farnell an email asking about this. The price, quoted in poun
2010-10-06 by Leon Heller
On 06/10/2010 19:07, Steve Hodge wrote: > I don't know about the OP but I sure can't find Atmega328P's in stock > anywhere (in TQFP package). Steve They are virtually unobtainable in any package. Farnell/Newark have some ATMEGA328P-PU chips, but that seems to be all there are. Le