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2008-09-19 by Sander Pool
The easiest time I ever had soldering a bunch of SMDs was when I used a stereo microscope in the lab of the company I worked at at the time. At home I use something like a 4x magnifying desk lamp but when my eyes start going downhill in a few years I may just have to get one of t
2008-09-19 by David Kelly
On Sep 18, 2008, at 6:21 PM, David VanHorn wrote: >> Ideally, "read a 400 MB file sequentially from start to end, then >> stop." > > What I'm asking is wether you need to actually READ those bytes, or > just cause them to go from one device to the other, external of the > AVR. >
2008-09-18 by Stevej
One more question to some of you older guys (like me). What power magnification do you use to be able to see the leads to solder to them? Steve -----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Stefan Wimmer Sent: Thursday, S
2008-09-18 by David VanHorn
> Ideally, "read a 400 MB file sequentially from start to end, then stop." What I'm asking is wether you need to actually READ those bytes, or just cause them to go from one device to the other, external of the AVR. This might be solvable with some simple hardware. > Less ideal,
2008-09-18 by David Kelly
On Thu, Sep 18, 2008 at 03:07:12PM -0400, David VanHorn wrote: > On Thu, Sep 18, 2008 at 1:36 PM, David Kelly wrote: > > Anyone have an idea as to how fast an AVR can read an SD card or CF > > card? Am in need of sustaining 10E6 bits/sec. At first glance this gives > > me 16 cloc
2008-09-18 by Lee de Vries
I used a +5V switching regulator in a project, which was a small hybrid board with a TO220 footprint. It was a drop-in replacement for a 7805 with similar Vin-max. I cannot recall the part number and I have moved the equipment on. However, I came accross this and it may foot the
2008-09-18 by David VanHorn
> "out PORT, reg" would be two times faster... True.. But it was fast enough. I had nothing else to do except the odd timer int while this was happening.
2008-09-18 by Enki
On 18 Sep 2008 at 15:07, David VanHorn wrote: > On Thu, Sep 18, 2008 at 1:36 PM, David Kelly > wrote: > > Anyone have an idea as to how fast an AVR can read an SD card or > CF > > card? Am in need of sustaining 10E6 bits/sec. At first glance this > gives > > me 16 clock cycles pe
2008-09-18 by David VanHorn
On Thu, Sep 18, 2008 at 1:36 PM, David Kelly wrote: > Anyone have an idea as to how fast an AVR can read an SD card or CF > card? Am in need of sustaining 10E6 bits/sec. At first glance this gives > me 16 clock cycles per byte at 20 MHz. This could work if the timing on > the mem
2008-09-18 by David Kelly
Anyone have an idea as to how fast an AVR can read an SD card or CF card? Am in need of sustaining 10E6 bits/sec. At first glance this gives me 16 clock cycles per byte at 20 MHz. This could work if the timing on the memory card is deterministic without periodic pauses, that I do
2008-09-18 by Stefan Wimmer
--- In AVR-Chat@yahoogroups.com, "David VanHorn" wrote: > > > Yes, the multi-pin SO chips are fairly easy. 0603 and 0402's are hard! > > Nah.. 0201s are interesting. Yeah! Got my first 0201's a couple of days ago. Pro: They don't take a lot of board space and their RF parameters
2008-09-18 by Stefan Wimmer
--- In AVR-Chat@yahoogroups.com, "Stevej" wrote: > > How do you solder those buggers onto the adapters? > > Steve > Hi Steve, Don already provided some good links for tutorials. Just let me add that I have a hollow tip for my Weller (Cooper tools) soldering iron that acts like a
2008-09-18 by Granz
Chuck, Take a look at Eddy Wright's Chibot Controller. http://www.wrighthobbies.net/catalog/product_info.php?cPath=43&products_id=124 ($9.95) You will also need a regular programmer (http://www.wrighthobbies.net/catalog/index.php?cPath=23) for $14.95 (only need one though) or you
2008-09-18 by David Harris
--- In AVR-Chat@yahoogroups.com, Carl Cravens wrote: > > Mike Bronosky wrote: > > I would stay away from ardunino and zbasic. > > Having just started working with an Arduino, I'm curious as to why you recommend against it. It seems to be meant to overcome the obstacles of getting
2008-09-18 by David Harris
Hi- I would check out the Arduino family -- PD project, excellent 'C' development package. Uses ATMega8 and 168. Lots of options. Uses a bootloader for painless uploads. See: http://arduino.cc/ As you are into model railroads, then check out the LEDuino at http://siliconrailway.c
2008-09-17 by David Harris
What about http://www.schmartboard.com/ ? Good selection and price. David --- In AVR-Chat@yahoogroups.com, "Stevej" wrote: > > How do you find these adapters/pcbs? I have looked through Digikey, Mouser, > and Avnet and can't find them. Can somebody point me to the right place? >
2008-09-17 by Raymond KI4VDJ
WOW! Impressive. Stefan Wimmer wrote: > > > --- In AVR-Chat@yahoogroups.com , > "Stevej" wrote: > > > > > > ...How do you breadboard using SO package chips? > > > > ...I use self adheisive adapters glued to prototype PCBs like you see > here: http://www.geocities.com/_wsw_/fujica
2008-09-17 by John Samperi
At 03:14 AM 18/09/2008, you wrote: >Can somebody point me to the right place? This is an Australian distributor. It will give you an idea of what you need. Go to the site and type SMD as a keyword. There are quite a few types. May need to scroll down the page. http://www.electusd
2008-09-17 by Carl Cravens
Mike Bronosky wrote: > I would stay away from ardunino and zbasic. Having just started working with an Arduino, I'm curious as to why you recommend against it. It seems to be meant to overcome the obstacles of getting started that you claim are a problem with WinAVR. -- Carl D Cr
2008-09-17 by David VanHorn
On Wed, Sep 17, 2008 at 1:14 PM, Stevej wrote: > How do you find these adapters/pcbs? I have looked through Digikey, Mouser, > and Avnet and can't find them. Can somebody point me to the right place? One name for them is "surfboards"
2008-09-17 by Stevej
How do you find these adapters/pcbs? I have looked through Digikey, Mouser, and Avnet and can't find them. Can somebody point me to the right place? Thanks, Steve -----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of David VanHor
2008-09-17 by Stevej
Don't go through all the trouble of trying to design a low noise switcher. You can get one from these folks. I think these supplies are about $11-$12 and they are pretty good. http://www.astrodyne.com/catalog.asp?pagetype=search&prtno=asd105&srchtype=w eb&code=usa I have dealt wi
2008-09-17 by Enki
On 17 Sep 2008 at 21:29, Xiaofan Chen wrote: > On Wed, Sep 17, 2008 at 8:50 PM, Enki wrote: > > I have used this design: > > > > Ultra Simple 5V Switchmode Regulator > > http://sound.westhost.com/appnotes/an006.htm > > > > A nice cheap switching regulator. > > > > There is an eve
2008-09-17 by David VanHorn
> I will not recommend this kind of circuitrs unless for cost > reasons. They tend to be quite noisy. Well, Nationals simple switchers aren't too wonderful, but unless you lay out the board with no consideration for the circulating currents, they certainly won't interfere with th
2008-09-17 by Xiaofan Chen
On Wed, Sep 17, 2008 at 8:50 PM, Enki wrote: > I have used this design: > > Ultra Simple 5V Switchmode Regulator > http://sound.westhost.com/appnotes/an006.htm > > A nice cheap switching regulator. > > There is an even better version here: > > Simple Switching Regulator > http://
2008-09-17 by Sander Pool
Interesting. I've been doodling in my head about a project like that. This is a bit like early heat seeking missiles :) Sander BobGardner@aol.com wrote: > > Look on the redrok site > >
2008-09-17 by Enki
On 17 Sep 2008 at 9:12, Tim Mitchell wrote: > Chuck Hackett wrote: > > My railroad signal application will require powering the boards > over > > a long distance (> 1,000 feet) from a head-end power supply. To > > overcome problems with the voltage drop along the cable run I am >
2008-09-17 by BobGardner@aol.com
Look on the redrok site -----Original Message----- From: Ridwansyah Irdianto To: AVR-Chat@yahoogroups.com Sent: Tue, 16 Sep 2008 7:35 pm Subject: [AVR-Chat] PROJECT SOLAR TRACKER Sorry, can anyone help me about the project of solar tracker??? [Non-text portions of this message ha
2008-09-17 by xolang1
Hi Have you considered AC first then transform this to DC at the far end? --- On Wed, 9/17/08, Tim Mitchell wrote: From: Tim Mitchell Subject: RE: [AVR-Chat] Powering an AVR with a switching regulator To: AVR-Chat@yahoogroups.com Date: Wednesday, September 17, 2008, 4:12 PM Chuck
2008-09-17 by Rick B.
Chuck I have the board you need. It is my own design. It is for rapid prototyping and small custom runs. Atmega168, two electromech power relays, buffered PWM out, on-board voltage regulation, lots of digital I/O, in-circuit programming, LED redouts, four pushbutton input (or use
2008-09-17 by Tim Mitchell
Chuck Hackett wrote: > My railroad signal application will require powering the boards over > a long distance (> 1,000 feet) from a head-end power supply. To > overcome problems with the voltage drop along the cable run I am > looking at using a switching regulator to cut the pos
2008-09-17 by Chuck Hackett
My railroad signal application will require powering the boards over a long distance (> 1,000 feet) from a head-end power supply. To overcome problems with the voltage drop along the cable run I am looking at using a switching regulator to cut the possible 24-36vdc power bus (fal
2008-09-17 by Chuck Hackett
> From: Sander Pool > > Chuck, depending on your needs (sorry if you listed them earlier) the > Butterfly and USBKey may be sufficient for your purposes. Cheap and > small. The butterfly can be soldered on a carrier for easier > experimenting or for deployment. The USBKey is prob
2008-09-16 by Ridwansyah Irdianto
Sorry, can anyone help me about the project of solar tracker??? [Non-text portions of this message have been removed]
2008-09-16 by John Samperi
At 01:36 AM 17/09/2008, you wrote: >1 ATMEGAxxx processor (ATMEGA168 desired, >2 JTAG support (for breakpoint debugging, loading, etc.) ...which is of course impossible as the 168 only has DW and NOT JTAG. I can't remember if you own a Dragon or JTAG Mk2?? You will need one of th
2008-09-16 by David VanHorn
> Yes, the multi-pin SO chips are fairly easy. 0603 and 0402's are hard! Nah.. 0201s are interesting.
2008-09-16 by David Kelly
On Tue, Sep 16, 2008 at 08:48:13PM -0000, Don Kinzer wrote: > > How do you solder those buggers onto the adapters? > If you have good basic soldering skills, it is not difficult to learn > SMD soldering. The fine pitch devices (less than 0.8 mm, pin to pin) > are more difficult b
2008-09-16 by Stevej
How do you solder those buggers onto the adapters? Steve -----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Sander Pool Sent: Tuesday, September 16, 2008 3:07 PM To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Re: OT: Bea
2008-09-16 by David VanHorn
I'd love to post pix of my current prototypes, but it's mostly BGAs, and I'd have to kill ya. :) 860 parts in a board the size of a large-ish drink coaster.
2008-09-16 by Sander Pool
Nicely done! Stefan Wimmer wrote: > > > > ...I use self adheisive adapters glued to prototype PCBs like you see > here: http://www.geocities.com/_wsw_/fujican1.jpg > or here: > http://www.geocities.com/_wsw_/mincf3s2.jpg > (a 32bit processor system > running at 90MHz!). I always
2008-09-16 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "Stevej" wrote: > How do you solder those buggers onto the adapters? If you have good basic soldering skills, it is not difficult to learn SMD soldering. The fine pitch devices (less than 0.8 mm, pin to pin) are more difficult but still doable. Th
2008-09-16 by Sander Pool
Chuck, depending on your needs (sorry if you listed them earlier) the Butterfly and USBKey may be sufficient for your purposes. Cheap and small. The butterfly can be soldered on a carrier for easier experimenting or for deployment. Sander Chuck Hackett wrote: > > > From: Dao Viet
2008-09-16 by Jim Hatley
Hello Chuck, There are many other places out there ( a google search will find them ) but www.sparkfun.com ( search AVR there ) might be worth you looking though there offerings. Should be something there to fit your requirements. I bought a couple 128 boards there for same reaso
2008-09-16 by Chuck Hackett
> From: Dao Viet Dung > > STK500 is what you need. You can buy it from Digikey. > > --- On Tue, 9/16/08, Chuck Hackett wrote: > From: Chuck Hackett > .... I figure I'll need 8-10 of them. > I have an STK500 but I think that may be a rather expensive route ... I think you missed t
2008-09-16 by Stefan Wimmer
--- In AVR-Chat@yahoogroups.com, "Stevej" wrote: > > > ...How do you breadboard using SO package chips? > ...I use self adheisive adapters glued to prototype PCBs like you see here: http://www.geocities.com/_wsw_/fujican1.jpg or here: http://www.geocities.com/_wsw_/mincf3s2.jpg (
2008-09-16 by Dao Viet Dung
STK500 is what you need. You can buy it from Digikey. --- On Tue, 9/16/08, Chuck Hackett wrote: From: Chuck Hackett Subject: [AVR-Chat] AVR Prototype board To: AVR-Chat@yahoogroups.com Date: Tuesday, September 16, 2008, 10:36 PM I have a project (Signals for a 7.5” gauge railroad
2008-09-16 by Rick
--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" wrote: > > I have a project (Signals for a 7.5â gauge railroad) that I need to get up and running quickly. > Chuck, I do not know what time constraints you are facing, but here is another suggestion. You could lay out the board a
2008-09-16 by Chuck Hackett
I have a project (Signals for a 7.5” gauge railroad) that I need to get up and running quickly. I am working on the design of a custom board based on an ATMEGAxxx to support a wide range of functionality but I do not have time to layout and produce the boards (Eagle, toner transf
2008-09-16 by Tim Gilbert
Steve, Digikey and others sell a smd-to-through hole pcb that is just a bit larger than the chip. Regards, 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: St
2008-09-16 by Stevej
Does anyone know of a good way to socket SO type chips (like SOIC-16)? I like to use DIP packages because they are easier to use for breadboarding (if I do a PC board, I can substitute the SO package for the DIP package), but more and more chips are coming out only in the SO pack