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2008-11-20 by wagnerj@proaxis.com
> On Wed, Nov 19, 2008 at 4:30 AM, mago Umandam wrote: >> Yes, Thanks for response. switch regulator seems to be a good solution. >> i googled and came to the switch regulator LM5008. I have no 1st hand >> experience in switch regulator. This 8 pin SMT IC is capable handling >> 7
2008-11-19 by David VanHorn
Sorry, I hit reply instead of reply all, I meant to copy the group. ---------- Forwarded message ---------- From: David VanHorn Date: Wed, Nov 19, 2008 at 6:47 PM Subject: Re: [avr-chat] JTAG Debug To: "Weddington, Eric" > I'm sorry you seem to had such problems with the tools. T
2008-11-19 by David VanHorn
On Wed, Nov 19, 2008 at 4:28 PM, John Samperi wrote: > At 07:58 AM 20/11/2008, you wrote: >>You may be able to do this by hitting the rail with a short pulse > > I was also thinking along the lines of isolating the rod and run the > output of a EHT transformer to it. (about 15KV)
2008-11-19 by John Samperi
At 07:58 AM 20/11/2008, you wrote: >You may be able to do this by hitting the rail with a short pulse I was also thinking along the lines of isolating the rod and run the output of a EHT transformer to it. (about 15KV) Then as soon as anyone touches the bar you can sense the curr
2008-11-19 by David VanHorn
> I have used the Qprox (now Atmel) chips with touch pads. You may be able to do this by hitting the rail with a short pulse and measuring ringing or reflection time. Depends too on how the rail is mounted. There's always the theremin approach, output is a frequency. You can auto
2008-11-19 by John Samperi
At 08:20 PM 19/11/2008, you wrote: >The railing is located indoors. >Its ok not to detect gloved hands. what is important is >to detect bare hands. I have used the Qprox (now Atmel) chips with touch pads. They have some good application notes and it may just do the trick. I guess
2008-11-19 by David VanHorn
On Wed, Nov 19, 2008 at 4:30 AM, mago Umandam wrote: > Yes, Thanks for response. switch regulator seems to be a good solution. i googled and came to the switch regulator LM5008. I have no 1st hand experience in switch regulator. This 8 pin SMT IC is capable handling 70V drop at 3
2008-11-19 by Bob Paddock
On Wed, Nov 19, 2008 at 1:12 AM, xolang1 wrote: > There is this 3 meter long "stainless" hollow metal rod. > This is the kind of material used in hand railings and > barriers. A person might grasp anywhere along the length > of this rod. > > The requirement is for an AVR to be ab
2008-11-19 by mago Umandam
Yes, Thanks for response. switch regulator seems to be a good solution. i googled and came to the switch regulator LM5008. I have no 1st hand experience in switch regulator. This 8 pin SMT IC is capable handling 70V drop at 300mA? Datasheet says efficiency is about 82% at 80Vin 3
2008-11-19 by xolang1
The railing is located indoors. Its ok not to detect gloved hands. what is important is to detect bare hands. --- On Wed, 11/19/08, John Samperi wrote: > From: John Samperi > Subject: Re: [AVR-Chat] touch sensor? > To: AVR-Chat@yahoogroups.com > Date: Wednesday, November 19, 2008
2008-11-19 by John Samperi
At 07:55 PM 19/11/2008, you wrote: >Make it an element of an RF oscillator and detect the change in frequency >when it is grasped? What happens if the rod is outdoor and it is raining? Regards John Samperi ******************************************************** Ampertronics Pty.
2008-11-19 by leon Heller
----- Original Message ----- From: "John Samperi" To: Sent: Wednesday, November 19, 2008 9:09 AM Subject: Re: [AVR-Chat] touch sensor? > At 07:55 PM 19/11/2008, you wrote: >>Make it an element of an RF oscillator and detect the change in frequency >>when it is grasped? > > What h
2008-11-19 by leon Heller
----- Original Message ----- From: "xolang1" To: Sent: Wednesday, November 19, 2008 6:12 AM Subject: [AVR-Chat] touch sensor? > Hi again, > > There is this 3 meter long "stainless" hollow metal rod. > This is the kind of material used in hand railings and > barriers. A person mig
2008-11-19 by xolang1
Hi again, There is this 3 meter long "stainless" hollow metal rod. This is the kind of material used in hand railings and barriers. A person might grasp anywhere along the length of this rod. The requirement is for an AVR to be able to detect if a human hand is there or not(a 1 o
2008-11-19 by stevech11
I don't think a reliable solution (e.g., cannot alter existing handrail and/or deal with a gloved hand) is feasible. --- In AVR-Chat@yahoogroups.com, xolang1 wrote: > > Hi again, > > There is this 3 meter long "stainless" hollow metal rod. > This is the kind of material used in h
2008-11-19 by Jim Wagner
On Nov 18, 2008, at 8:01 PM, magzky02 wrote: > > Hello guys, I hope to get inputs. i am doing a a power supply card. > input is 80V, output is variable from 0-76V (up to 500mA). i want my > AVR to set the ouput voltage. i came accross high voltage variable > regulators such as LM
2008-11-19 by Eric Rabinowitz
Don, thanks for the good news! Eric Linn Rabinowitz 415.336.6938 mobile 512.494.4914 home/office N6LG Eric Linn Rabinowitz eric.rabinowitz@gmail.com 415.336.6938 mobile 512.494.4914 home/office N6LG
2008-11-19 by Don AE5K
From the ON Semiconductor website: ON Semiconductor Withdraws from Proposal to Acquire Atmel Microchip Intends to Evaluate its Potential Alternatives following ON Semiconductor’s Withdrawal Phoenix and Chandler, Arizona, November 18, 2008 – ON Semiconductor Corporation (NASDAQ: O
2008-11-19 by stevech11
Wish it were that simple... see this http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=71269&highlight=dirty+tricks --- In AVR-Chat@yahoogroups.com, Eric Rabinowitz wrote: > > Don, > thanks for the good news! > > Eric Linn Rabinowitz > 415.336.6938 mobile > 512.49
2008-11-19 by magzky02
Hello guys, I hope to get inputs. i am doing a a power supply card. input is 80V, output is variable from 0-76V (up to 500mA). i want my AVR to set the ouput voltage. i came accross high voltage variable regulators such as LM5008(national) and TL783 (TI). But outputs are controll
2008-11-18 by David VanHorn
> People these days tend to forget The Bad Old Days when most every IC was > super sensitive to static discharge during handling. They are still > sensitive but not anything nearly as bad as they once were when one > could almost zap gates with ESP (Extra-Sensory Perception, just
2008-11-18 by David Kelly
On Tue, Nov 18, 2008 at 09:38:50AM -0500, David VanHorn wrote: > On Tue, Nov 18, 2008 at 7:11 AM, Kathy Quinlan > wrote: > > NO, the internal diodes are not designed for this level of > > protection, depending on your external resistor values, you could > > exceed the maximum sin
2008-11-18 by David VanHorn
On Tue, Nov 18, 2008 at 7:11 AM, Kathy Quinlan wrote: > NO, the internal diodes are not designed for this level of protection, > depending on your external resistor values, you could exceed the maximum > sink current of the device. Definitely correct. Although the internal protec
2008-11-18 by Zack Widup
A couple questions: Are the resistors in the divider and the zener surface-mount devices or leaded devices? And what current is the vibration sensor capable of producing at 70 volts? Chip components have a tendency to develop minute cracks when under a lot of vibration. I've had
2008-11-18 by Kathy Quinlan
By doing it that way you can also protect from reverse spikes, which is a great idea. xolang1 wrote: > > > > the source resistance should be around 50-75k > which should be sufficient for current limiting. > for over voltage protection, reverse Ge diodes (0.3V) will be > placed f
2008-11-18 by xolang1
the source resistance should be around 50-75k which should be sufficient for current limiting. for over voltage protection, reverse Ge diodes (0.3V) will be placed from adc to vcc and gnd to adc. any thing missed or inappropriate? --- On Tue, 11/18/08, Kathy Quinlan wrote: > From
2008-11-18 by Kathy Quinlan
NO, the internal diodes are not designed for this level of protection, depending on your external resistor values, you could exceed the maximum sink current of the device. An external reverse-biased Schottky will provide the extra protection needed. I believe in belts and braces,
2008-11-18 by xolang1
Appreciate the help guys. that was informative. the datasheet indeed says the ADC's are internally diode protected. so then it seems the current circuit would suffice. thanks! --- On Tue, 11/18/08, Dao Viet Dung wrote: From: Dao Viet Dung Subject: Re: [AVR-Chat] Protecting the AD
2008-11-18 by Dao Viet Dung
All of the ATmega series themself have protected diode inside. So you should find the other way to protect it. --- On Tue, 11/18/08, Jim Wagner wrote: From: Jim Wagner Subject: Re: [AVR-Chat] Protecting the ADC To: AVR-Chat@yahoogroups.com Date: Tuesday, November 18, 2008, 12:30
2008-11-18 by Jim Wagner
On Nov 17, 2008, at 9:19 PM, xolang1 wrote: > Hi > > I have an ATmega128 utilizing the ADC to read voltage from a > thin film vibration sensor that generates voltages from 0 - 70V. > > Im currently using a simple resitor voltage divider to scale down > this 0-70V to 0-5V. To prot
2008-11-18 by xolang1
Hi I have an ATmega128 utilizing the ADC to read voltage from a thin film vibration sensor that generates voltages from 0 - 70V. Im currently using a simple resitor voltage divider to scale down this 0-70V to 0-5V. To protect the ADC pin, i have a 5V Zener across the ADC input. Q
2008-11-17 by Momen Yousri
Can you specify how much money needed for mass production stage?? Eng. Momen Yousri Mohamed Telecommunications and Electronics Engineer Three Phase Electrical Sharjah,UAE 00971508152464 ________________________________ From: RAGAB ABD ELGAWAD To: avr-chat@yahoogroups.com; ENG.RAG
2008-11-17 by RAGAB ABD ELGAWAD
DEAR friends i hope you are fine PLEASE READ ALL THE MAIL to help me how to find a partner???? i working in system solutions and automation by using my knowledge with ATMEL AVR & ATMEL 89C52 microcontrollers, LCD, Eproms, matrix keyboard, Analog to digital converters, 82C55 PPI a
2008-11-16 by Reid
You could get Arduino or iduino or kind of same. Reid On Mon, Nov 10, 2008 at 5:38 AM, David Appleton wrote: > There is an IC called: > > cp2102 > > This IC interfaces USB to the UART on your processor. > > [Non-text portions of this message have been removed] > > > [Non-text por
2008-11-15 by Cláudio E. Elicker
On Friday 14 November 2008, brewski922 wrote: > Presently I'm using Programmers Notepad on Windows and QEdit, I > believe, on Linux. > > Both have their good and bad points, like anything. But learning and > going back and forth between the two is hectic. I want to go to a > dece
2008-11-15 by Dave Hylands
Hi Mike, On Fri, Nov 14, 2008 at 9:48 AM, brewski922 wrote: > Presently I'm using Programmers Notepad on Windows and QEdit, I > believe, on Linux. > > Both have their good and bad points, like anything. But learning and > going back and forth between the two is hectic. I want to
2008-11-14 by David Kelly
On Fri, Nov 14, 2008 at 05:48:33PM -0000, brewski922 wrote: > Presently I'm using Programmers Notepad on Windows and QEdit, I > believe, on Linux. > > Both have their good and bad points, like anything. But learning and > going back and forth between the two is hectic. I want to
2008-11-14 by Christopher Baker
I use a standard text editor on both. Occasionally, I will use notepad+ + on windows. It has a few extra features (line numbers, auto indent, etc). Gedit on Linux has mostly the same features. If you need the same program on both, you will likely end up using java. On Nov 14, 200
2008-11-14 by leon Heller
----- Original Message ----- From: "brewski922" To: Sent: Friday, November 14, 2008 5:48 PM Subject: [AVR-Chat] Programming editor for Win and Linux > Presently I'm using Programmers Notepad on Windows and QEdit, I > believe, on Linux. > > Both have their good and bad points, lik
2008-11-14 by brewski922
Presently I'm using Programmers Notepad on Windows and QEdit, I believe, on Linux. Both have their good and bad points, like anything. But learning and going back and forth between the two is hectic. I want to go to a decent programmer's editor that works, more or less the same,
2008-11-14 by Rick B.
. Pulse width modulation. 1 to 2 milliseconds, 50 hz. . --- On Wed, 11/12/08, wiyawan sumari wrote: From: wiyawan sumari Subject: Bls: [AVR-Chat] Re: control servo motor To: AVR-Chat@yahoogroups.com Date: Wednesday, November 12, 2008, 6:30 PM i using servo to control leg of legge
2008-11-14 by Muhammad Amiruddin
as i know, servo motor can be driven base on the long time between the changes of logic from high ( ' 1' ) to low ( ' 0 ' ) or the opposite from low ( ' 0 ' ) to high ( ' 1' ) . It can say that we try to regulate the periode time of the time high and time low. if you already read
2008-11-12 by wiyawan sumari
i using servo to control leg of legged robot. any sugestin todo that?. thx ________________________________ Dari: Rick Kepada: AVR-Chat@yahoogroups.com Terkirim: Kamis, 13 November, 2008 02:11:18 Topik: [AVR-Chat] Re: control servo motor --- In AVR-Chat@yahoogroup s.com, "wiyawan
2008-11-12 by Rick
--- In AVR-Chat@yahoogroups.com, "wiyawan" wrote: > > hello, can you help me programing AVR to control servo motor ?, i > using atmega8535 and compiler use code vision. thx > I see numerous people have responded with suggestions on how to control a servo actuator ( such as those
2008-11-12 by Kathy Quinlan
LOL I have been busy, first it was a house that we bought needed major renovations (re lining drywall and doing a few ceilings (then security cabling, computer network cabling and upgrade of power cabling) painting etc) plus work gets in the way lol I am back doing electronics de
2008-11-12 by Roy E. Burrage
Where have you been Maw? You've been awfully quiet lately. Personally, I'd much rather see requests for job leads from those who have contributed to, and supported, this list as Graham and Philippe have than to see so many requests for homework and class projects to be done. "How
2008-11-12 by Kathy Quinlan
Hi All, List mom here :) I see no problems with people who work full time asking for any work, when it is our livelihood and getting a job means the difference between meeting bills and eating or not, all the leads we can get is welcomed. If it gets out of hand I may have to chan
2008-11-11 by Philippe Habib
I know this isn't really a job board, but I also just finished a project and the next thing I've had lined up has been "ready to go in one or two more weeks" for the last 3 months. I'm in the Silicon Valley area. On Nov 11, 2008, at 12:11 PM, Cat wrote: > Good luck Graham, > > Ca
2008-11-11 by Cat
Good luck Graham, Cat > Graham. > > P.S. By the way, if anyone is looking for (paid) help on AVR projects > or in fact any embedded systems project, the job I am working on has > been put on hold and I am presently available.
2008-11-11 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "englsprogeny" wrote: > Sorry about the lack of detail. > Here's more: ... [more] ... OK, so I've installed AVR Studio Version 4.14 Build 589 and WinAVR 20080610 in a VirtualBox virtual machine running WinXP Home SP3 (I do this to get around the d