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2012-06-25 by Tim Mitchell
----Original Message---- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Dave McLaughlin Sent: 22 June 2012 18:19 To: AVR-Chat@yahoogroups.com Subject: RE: [AVR-Chat] artwork for touch wheel > Have you done any yourself Tim? > > Would also be interes
2012-06-25 by Jim Wagner
Well, in some way, we need to see a schematic and code. Jim Wagner Oregon Research Electronics On Jun 24, 2012, at 12:32 PM, Daniel Skåre wrote: > > Hi all, > > I have been struggling for quite a while now to decode IR signal with > atmega32 and IR receiver TSOP32238. I am follow
2012-06-25 by enkitec@gmail.com
Yo are right. The analog way it will be. Mark On 24-Jun-12 20:50, Jim Wagner wrote: > Traditionally, it is done with an RC filter and a diode detector. If the amplitude is high enough (say, a couple of volts peak-peak), no amplification may be needed. Commonly, an analog comparat
2012-06-25 by Jim Wagner
An additional note - You are going to have to add a bias network and coupling cap at the ADC input, since the ADC can only handle positive voltages. Jim On Jun 24, 2012, at 4:50 PM, Jim Wagner wrote: > Traditionally, it is done with an RC filter and a diode detector. If the ampli
2012-06-24 by Jim Wagner
Traditionally, it is done with an RC filter and a diode detector. If the amplitude is high enough (say, a couple of volts peak-peak), no amplification may be needed. Commonly, an analog comparator is used to look at the rectifier output. The comparator reference is adjustable to
2012-06-24 by enkitec@gmail.com
This is exactly what I need, but how to do it in software? A high pass FIR or IIR filter? Mark On 24-Jun-12 17:42, Jim Wagner wrote: > Motorola 2Way radios used this for years. It was called "noise squelch" or something like that. You have a high pass filter that cuts off above t
2012-06-24 by Jim Wagner
Motorola 2Way radios used this for years. It was called "noise squelch" or something like that. You have a high pass filter that cuts off above the top of the voice spectrum. Amplify and rectify the filter output. You will have a rectified output only when there is nothing to hea
2012-06-24 by Daniel Skåre
Hi all, I have been struggling for quite a while now to decode IR signal with atmega32 and IR receiver TSOP32238. I am following the tutorial on http://www.ladyada.net/learn/sensors/ir.html , but the terminal output does not give out the same output each time I press the power to
2012-06-24 by bobgardner@aol.com
White noise has all frequencies and a freq resp that rises at 3db per octave. So I'd try a one octave filter at 80Hz and a one octave filter at 10KHz which is 7 octaves higher and check and see if the hi freq is 21db above the lo freq. Music usually rolls off at the higher freque
2012-06-24 by enkitec@gmail.com
Hi, I want to build a FM radio squelch using an ATMEGA8. The ADC will be sampling the FM radio audio output and turn on a LED when there is only noise present. The LED will be off when someone is using the channel (no noise, just voice). What is the best way of doing this in soft
2012-06-22 by Dave McLaughlin
I was going to mention the same as I also use Altium Designer but have not yet tried out the QTouch stuff yet. I also have the Atmel QTouch Studio installed and fancy making up a test board just to try it out. Have you done any yourself Tim? Would also be interested to hear from
2012-06-20 by Tim Mitchell
I use Altium Designer which has an automatic system for generating Atmel qtouch pads and wheels. You tell it the thickness of your overlay panel and the touch size required and it will make them for you. It is an expensive bit of software though. -- Tim Mitchell tim@sabretechnolo
2012-06-19 by Philippe Habib
I have trouble drawing a straight line with a ruler so drawing the intricate curves of a wheel scares me. I'll see what I can do as far as scanning and pasting. As I was poking around the web, I saw buttons and wheels for another PCB program that defined them as parts. It looks l
2012-06-19 by Tim Mitchell
For a touch wheel I would normally just draw it out on the copper layer. It's probably not worth designing it as a part, unless you are going to use the exact same wheel over and over. Even if you could find someone else's design, it's very dependent on the thickness of the overl
2012-06-18 by tim gilbert
Have you looked on Cadsoft's download site? However, there's no better way to learn Eagle than to start making your own parts. -- Tim Gilbert JEM Innovation Inc. 303-926-9053 (office) 303-437-4342 (cell) www.jeminnovation.com www.pdksolutions.com On 6/18/2012 3:21 PM, Philippe Ha
2012-06-18 by Philippe Habib
This is only a bit AVR related. I'm learning Eagle CAD by designing a simple board with a display, a touchwheel and a few buttons. I have not been able to find the artwork for a wheel that I can paste into Eagle. I found a few mentions of one from Atmel, but all of the links are
2012-06-14 by Philippe Habib
Thank you both for taking the time to answer, and for the pointer to how to export. I agree about the value of doing your own stuff. I did create my own part for the IC, and I was hoping to save myself some work for the display. This is the first time I try to do a board since la
2012-06-14 by Dave McLaughlin
Have to concur with Graham on this. Always roll your own or at least triple check library parts and better still import them into your own libraries after triple checking them. Messed up PCB designs make good coffee mug coasters but rather expensive ones at that! :o) I use Altium
2012-06-14 by bayramdavies
phabib wrote: > I'm learning Eagle CAD ... New Haven Display > NHD-C12832A1Z ... found a .sch file and a .brd > file that uses the display ... haven't been > able to figure out how to go from there ... First, if you are "learning Eagle CAD", you might as well get used to creating
2012-06-13 by phabib
I'm learning Eagle CAD and trying to design a general purpose touch panel and LCD display that I could use as a user interface. The touch IC I wanted to use (Atmel QT2100) was too new to be in a library so I created a new part by using an existing 32pin footprint and defining the
2012-06-08 by ejubenville
On a AT90USB646 chip, I'm trying to restart Timer0 during an external interrupt, with the goal of synchronizing the subsequent timer interrupts to the edge of the initial external interrupt. I need to start a timing sequence following the external interrupt even, and I need to ge
2012-05-18 by Kenny M.
Thank you very much to all of you, it's finally working. I took your suggestion and I removed the diode/resistator I had and instead put one of each on 87a of both mirrors. http://img209.imageshack.us/img209/4048/finalmirrorcircuit.png :) ________________________________ From: R
2012-05-18 by Steven Hodge
Thanks a lot for everyone's input on the DRE interrupt. I'll probably use it at some point. Steve From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Clark Martin Sent: Friday, May 18, 2012 9:01 AM To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Re:
2012-05-18 by Clark Martin
Sent from an iPhone, but is it mine? On May 18, 2012, at 6:47 AM, "Steven Hodge" wrote: > This is somewhat of an aside. I just finished porting my USART ISR's from > mega to xmega. They only use the Receive Complete (RXC) and Transmit > Complete (TXC) interrupts. I've always been
2012-05-18 by Cat C
I think if you have a TX buffer you use that interrupt to send the next char in the buffer (if not empty). Cat > To: AVR-Chat@yahoogroups.com > From: steve@terrafirma.us > Date: Fri, 18 May 2012 06:47:48 -0700 > Subject: RE: [AVR-Chat] Re: USART Interrupts > > This is somewhat of
2012-05-18 by David Kelly
On May 18, 2012, at 8:47 AM, Steven Hodge wrote: > This is somewhat of an aside. I just finished porting my USART ISR's from > mega to xmega. They only use the Receive Complete (RXC) and Transmit > Complete (TXC) interrupts. I've always been curious as to when one would > use the
2012-05-18 by Steven Hodge
This is somewhat of an aside. I just finished porting my USART ISR's from mega to xmega. They only use the Receive Complete (RXC) and Transmit Complete (TXC) interrupts. I've always been curious as to when one would use the "Data Register Empty" (DRE) interrupt. Can somebody give
2012-05-18 by STEVEN HOLDER
Hi, Could you use the DMA Controller linked to the UART ? Free-rtos tends to use interrupts to send the data to a port buffer, the buffer is then interrogated by the task. Regards ________________________________ From: englsprogeny1 To: AVR-Chat@yahoogroups.com Sent: Friday, 18 M
2012-05-18 by Jim Wagner
On May 18, 2012, at 3:39 AM, englsprogeny1 wrote: > I was thinking about building a simple OS (task scheduler). My thoughts are that the only interrupt that I will service will be a timer used as a 'frame counter/ sync'. > > In each frame (at a specific time) I will check the UAR
2012-05-18 by bayramdavies
"englsprogeny1" wrote: > I want to safely receive (buffer) data seen > on the UART Rx wihtout servicing the 'Receive > Compete Interrupt'(as if I had a FIFO ...) > > Any thoughts? My thought is that it would be much easier to service the Receive Compete Interrupt. As you are doin
2012-05-18 by englsprogeny1
I was thinking about building a simple OS (task scheduler). My thoughts are that the only interrupt that I will service will be a timer used as a 'frame counter/ sync'. In each frame (at a specific time) I will check the UART to see if there is anything there. Problem here is tha
2012-05-18 by Kenny M.
Okay I'll swap those out tomorrow. I had that part of the circuit already soldered and heatshrinked so I was hoping it would work fine. Thanks :) ________________________________ From: R E Purcella To: AVR-Chat@yahoogroups.com Sent: Friday, May 18, 2012 12:44 AM Subject: Re: [AVR
2012-05-18 by R E Purcella
Previously the circuit was to have half brightness with running lamps. To do that you should have 2 separate current resistors, one for each LED into 87a contact. What I see happening is the current to the right side is spiking up when the left side circuit breaks. The resistor d
2012-05-18 by Kenny M.
Hey guys me again :) I gave up on that other circuit and just put in 2 relays. I have everything working 95%. http://img846.imageshack.us/img846/5051/relaymirrorcircuit.png Now for my one small problem... Lets say I apply a steady 12V+ to the center circuit, now I activate my lef
2012-05-17 by Kenny M.
I just send you a copy of the file directly ________________________________ From: Dave McLaughlin To: AVR-Chat@yahoogroups.com Sent: Thursday, May 17, 2012 3:25 AM Subject: RE: [AVR-Chat] Help with circuit I get a domain unregistered and blocked message on these links. Anyone kn
2012-05-17 by Dave McLaughlin
I get a domain unregistered and blocked message on these links. Anyone know how to get around that? Cheers. Dave. From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Kenny M. Sent: 17 May 2012 13:54 To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] He
2012-05-17 by Kenny M.
Sorry :( http://img214.imageshack.us/img214/2977/allcircuitscopycopy.png a) The hexagon simply represents the third power source which when on will turn both led's on at half brightness. b) The arrows represent the power source to flash the appropriate led on full and off c) When
2012-05-17 by Jim Wagner
Hmmm - Not quite. Get rid of the two diodes next to the 470 ohm resistors. Add one more diode to the resistor common point Get rid of the red hexagon One diode to yellow arrow Other diode to other yellow arrow. Jim On May 16, 2012, at 10:54 PM, Kenny M. wrote: > Hey Jim thanks fo
2012-05-17 by Kenny M.
Hey Jim thanks for the reply. How does this look? http://img233.imageshack.us/img233/9564/allcircuitscopy.png I added one diod feeding the resistors without it either signals would feed all the other bulbs on the common circuit I would think. ________________________________ From
2012-05-17 by Jim Wagner
On May 16, 2012, at 9:01 PM, Kenny M. wrote: > Hey there :) My whole AVR project got pushed asside due to a lack of funds so I haven't been on here in a long time. > > I hope I don't PO anyone but I'm trying to get some help with another circuit I'm designing (see imageshack link
2012-05-17 by Kenny M.
Hey there :) My whole AVR project got pushed asside due to a lack of funds so I haven't been on here in a long time. I hope I don't PO anyone but I'm trying to get some help with another circuit I'm designing (see imageshack link below). I've tried some other forums but I don't t
2012-04-21 by Brian Dean
On Apr 21, 2012, at 10:02 AM, Robert Adsett wrote: > On 4/20/2012 9:49 PM, Brian Dean wrote: > > The essence of it is that it instructs the compiler that this > > "storage area", is, as the name implies, volatile.Meaning, the > > content may change outside of the compiler's compi
2012-04-21 by Robert Adsett
On 4/20/2012 9:49 PM, Brian Dean wrote: > The essence of it is that it instructs the compiler that this > "storage area", is, as the name implies, volatile.Meaning, the > content may change outside of the compiler's compile-time knowledge, Actually it doesn't. If it did const vol
2012-04-21 by Bob Paddock
> If I'm going to put an explanation forward, it is my duty to use all > reasonable efforts to make sure that explanation is complete, correct and > understandable by my target audience. > > Having written the above, it now occurs to me that I don't belong on the > Internet. Obli
2012-04-21 by bayramdavies
R E Purcella wrote: > I think you are nit picking words. Well, yes, of course I'm nit picking words. I have taken it upon myself to try to get the use of the volatile qualifier straightened out. The only tool I have to do that is words. How can I expect to communicate precisely i
2012-04-21 by Brian Dean
I've been following this discussion with some amusement and even some interest at times. :-) Some folks have said that volatile is not a good keyword choice for what it instructs the compiler to do, but I think it is a great word, because it accurately describes the nature of the
2012-04-20 by Robert Adsett
On 4/18/2012 7:00 PM, Steven Holder wrote: > Robert, > > Excellent. Thanks Steven, I prefer an explanation in terms of what is promised rather than how you would use it. The discussion here is amply illustrating why. Robert -- From the Divided by a Common Language File (Edited to
2012-04-20 by Robert Adsett
On 4/20/2012 7:35 PM, Don Kinzer wrote: > --- In AVR-Chat@yahoogroups.com, R E Purcella > wrote: >> Use volatile variables in ISR routines or strange things happen. > That sure sounds like a superstition, somewhat akin to "don't walk > under ladders or bad things will happen". Ne
2012-04-20 by R E Purcella
I think you are nit picking words. Optimized value was explained by Gregory N. Many C, C++ code lines are directives to the compiler: include, define . . . Apparently volatile is as well. I suppose that volatile is indeed far more complex in execution. But, hardly needed in order
2012-04-20 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, R E Purcella wrote: > Use volatile variables in ISR routines or > strange things happen. That sure sounds like a superstition, somewhat akin to "don't walk under ladders or bad things will happen". Neither statement suggests any understanding of a