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2004-09-09 by Dave Miller
Hello, My previous company I worked for used two cheapo whirlpool dishwashers for washing assemblies. We found that it was actually too time consuming and we weren't able to get enough throughput because the backlog was in the washing so we went to no clean for our high run items
2004-09-09 by Henry Carl Ott
At 11:34 AM 9/9/2004, you wrote: >In a similar vein, I'm thinking of obtaining a dishwasher for cleaning boards. >I'm not sure wether this is urban legend or not, but I have heard that >they are sometimes used to clean boards.. I wouldn't be able to supply it >with distilled wate
2004-09-09 by Alexandre Guimaraes
Hi, Dave > >Hello Larry, > > > >I personally prefer water soluble over no-clean. This is more for > >aesthetics than for anything else. I like a shiny clean assembly when I am > >done. A small paint brush (cut down to a stub) and some water can really > >make the PCB shine with w
2004-09-09 by Dave VanHorn
At 11:44 AM 9/9/2004, Mark Jordan wrote: >On 9 Sep 2004 at 3:17, Dave VanHorn wrote: > >> >> > >> > But, if I apply an external reset, all goes back to normal. >> > A 100nF capacitor from RESET pin to ground solves the problem, too. >> > Does the internal PowerOn Reset is not wor
2004-09-09 by Mark Jordan
On 9 Sep 2004 at 3:17, Dave VanHorn wrote: > > > > > But, if I apply an external reset, all goes back to normal. > > A 100nF capacitor from RESET pin to ground solves the problem, too. > > Does the internal PowerOn Reset is not working on Timer2? > > > > Any suggestions? > > Do y
2004-09-09 by Craig Limber
Hi there; Daniel wrote: > I need to order some more sot-23 package transistors from Digikey... The > supply that I have now, which is dwindling, came from someone on Ebay > and the tape was marked 2n3904 and 2N3906. When I look at digikey I can You can get them. I got some. Just
2004-09-09 by Dave VanHorn
At 10:30 AM 9/9/2004, Dave Miller wrote: >Hello Larry, > >I personally prefer water soluble over no-clean. This is more for >aesthetics than for anything else. I like a shiny clean assembly when I am >done. A small paint brush (cut down to a stub) and some water can really >make
2004-09-09 by Dave Miller
Hello Larry, I personally prefer water soluble over no-clean. This is more for aesthetics than for anything else. I like a shiny clean assembly when I am done. A small paint brush (cut down to a stub) and some water can really make the PCB shine with water soluble. Also make sure
2004-09-09 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Larry Barello" wrote: > ... I have a question about solder! I would recommend 0.015 in. diameter for SMD work. I also have 0.020 in for through-hole but 0.025 would be fine too. I would recommend no-clean, but clean as is convenient using drug st
2004-09-09 by Dave Hylands
Hi Daniel, You can still get them on eBay: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=4666&item=3837648 066&rd=1 You can also order directly from USACaps: http://www.usacaps.com/transistors_surface_mount.html Mouser sells them a bit cheaper: 3906: http://snipurl.com/8
2004-09-09 by Daniel Boyer
I need to order some more sot-23 package transistors from Digikey... The supply that I have now, which is dwindling, came from someone on Ebay and the tape was marked 2n3904 and 2N3906. When I look at digikey I can not seem to find these in a sot-23 package. I am a biologist who
2004-09-09 by Mike Bronosky
Got following message from Paul Gehrls of Digi-Key in response to a email to them yesterday concerning John Trompson being one of their employees. Of course I too would have been shocked if he was a employee of Digi-Key. However, if he was they needed to know about him. Mike Bron
2004-09-09 by John Samperi
At 12:49 AM 9/09/04 -0400, you wrote: >Both of these are "no clean" which basically means any flux residue is >cosmetic, but I clean anyway, especially if it is a board for someone >else. How do you clean? :- ) Is it water based flux? Regards John Samperi ************************
2004-09-09 by Dave VanHorn
> > But, if I apply an external reset, all goes back to normal. > A 100nF capacitor from RESET pin to ground solves the problem, too. > Does the internal PowerOn Reset is not working on Timer2? > > Any suggestions? Do you fully init the timer, or do you leave some of the register
2004-09-09 by Russell Shaw
Russell Shaw wrote: > Larry Barello wrote: > >>Ok, I work almost exclusively with AVR, but I have a question about solder! >> >>Of the various choices at Digikey, what is a good, general purpose, solder >>to use on small electronic assemblies? >> >>The no-clean and water soluble
2004-09-09 by Brian Dean
Hi Larry, On Wed, Sep 08, 2004 at 06:23:40PM -0700, Larry Barello wrote: > Ok, I work almost exclusively with AVR, but I have a question about solder! > > Of the various choices at Digikey, what is a good, general purpose, solder > to use on small electronic assemblies? > > The n
2004-09-09 by Daniel Boyer
I use the Kester "245" in the .031" dia.... I read this as a highly recommened solder somewhere (can't find the site now) and I have to agree... It wets well, resist forming bridges, and the .031" dia is small enough for small SMDs but not so small that you use 6" of it solding a
2004-09-09 by Mark Jordan
Hi, I have found a very weird reset problem on the Mega8. My program works 100% but sometimes the Timer2 on fast PWM mode refuses to output anything to the OC2 pin. The OC2 pin remais at zero. The Timer1 and Timer0 continues to work. The RS232 too. The program does all its tasks
2004-09-09 by Russell Shaw
Larry Barello wrote: > Ok, I work almost exclusively with AVR, but I have a question about solder! > > Of the various choices at Digikey, what is a good, general purpose, solder > to use on small electronic assemblies? > > The no-clean and water soluble sound good to me. I just w
2004-09-09 by Dave VanHorn
At 08:23 PM 9/8/2004, Larry Barello wrote: >Ok, I work almost exclusively with AVR, but I have a question about solder! > >Of the various choices at Digikey, what is a good, general purpose, solder >to use on small electronic assemblies? 63/37, I keep the 20 mil and 10 mil diamet
2004-09-09 by Larry Barello
Ok, I work almost exclusively with AVR, but I have a question about solder! Of the various choices at Digikey, what is a good, general purpose, solder to use on small electronic assemblies? The no-clean and water soluble sound good to me. I just want to be able to lay down SMD pa
2004-09-09 by Bernd Felsche
On Thursday 09 September 2004 00:27, Dave VanHorn wrote: > At 10:06 AM 9/8/2004, Electronic Lithuania wrote: > >Have important question to group members. > >I am trying to find a company or person able to extract the > > programm/data memory from protected ATmega128 and .jed Xili
2004-09-08 by Bruce Parham
Sort of sounds like the "Once and Future King" has gone completely senile. Bruce Dave VanHorn wrote: > > > > >Mind you, the Z8 Encore! is much easer to understand and program than > >the ATmega and you only need one pin for firmware load and in-circuit > >debug. If only ZiLOG wou
2004-09-08 by Dave VanHorn
> >Mind you, the Z8 Encore! is much easer to understand and program than >the ATmega and you only need one pin for firmware load and in-circuit >debug. If only ZiLOG wouldn't screw up all the time ... I started out writing Z8 code. Their emulator was only useful for programming O
2004-09-08 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > It was a semi-rhetorical question.. :) Well, mine was a semi-trailer answer! *& > > ... we've had a few productive conversations > > about ZiLOG's many failings ... > I'm surprised that you're done so quickly! I didn't say we
2004-09-08 by Dave VanHorn
> >No. If he was, he would probably have spelled it correctly with the >hyphen and upper-case K. I also got his message directly. His e-mail >address appeared as ltu_electronic at yahoo dot com. It was a semi-rhetorical question.. :) >He's obviously up to no good, but posing as s
2004-09-08 by Dave VanHorn
At 10:06 AM 9/8/2004, Electronic Lithuania wrote: >Have important question to group members. >I am trying to find a company or person able to extract the programm/data memory from protected ATmega128 and .jed Xilinx XCR3032. >The work will be paid in limits of 3-5K USD. >I heard
2004-09-08 by Mark Jordan
On 8 Sep 2004 at 8:06, Electronic Lithuania wrote: > > Have important question to group members. Important question or just piracy propaganda?
2004-09-08 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > At 10:06 AM 9/8/2004, Electronic Lithuania wrote: > > I am trying to find a company or person able to > > extract the programm/data memory from protected > > ATmega128 and ... > Why is Digikey looking for this? > Are you real
2004-09-08 by Electronic Lithuania
Have important question to group members. I am trying to find a company or person able to extract the programm/data memory from protected ATmega128 and .jed Xilinx XCR3032. The work will be paid in limits of 3-5K USD. I heard that http://www.semiresearch.com provides services, as
2004-09-08 by stevech
and we have this freeware... http://www.avrfreaks.net/Freaks/freakshow.php?keyword_is_id=1&keywords=230
2004-09-07 by Robert Adsett
At 10:38 PM 9/7/04 +0000, you wrote: >So perhaps we have these approaches to real-time system design, in >ascending order of sophistication/complexity/resource needs: > >* ad-hoc >* super-loop >* cooperative run-to-completion RTOS >* cooperative yield-when-I-want-tp RTOS >* preem
2004-09-07 by Robert Adsett
At 07:14 PM 9/7/04 +0000, you wrote: >Although the highest priority task cannot run until the currently >running task voluntarily gives up the CPU, this is often perfectly >acceptable. You just have to make sure all your tasks yield often >enough for the high priority tasks to me
2004-09-07 by Dave Hylands
Hi Graham, > > ... So, in an RTOS, the highest > > priority ready-to-run thread > > is always running... > > This and the rest of your explanation applies to preemptive systems. Yep - that's what I work in most of the time. > As there seems to be no objection to the direction thi
2004-09-07 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Robert Adsett wrote: > >The benefits of a cooperative system, such as ECROS, are: > >*** no need for a stack per task, i.e. more tasks in less RAM > > I don't understand this assertion ... This is a great discussion thread. I confess I have not pr
2004-09-07 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > ... in your case [ECROS], a timer schedules > your re-evaluation of which tasks should be > running/queued. During that timer int, you > do what I do, in that you examine semaphores > to see what's ready, what's done, what's
2004-09-07 by otojam11
Hi There !! I'm Working with the Ats902313, where can i get macros ???, specially one to multiply two numbers ...
2004-09-07 by Dave VanHorn
> >If the point of your message is to take issue with my claim that it >is not necessary to poll, then I give up. You win. It is possible to >define polling such that polling is necessary. I don't care how; >picking at terminology is not interesting to me. If I'm understanding it
2004-09-07 by Dave VanHorn
> >> How exactly do you "send" an event to a task? > >There is an ECROS function to do this. That didn't really illuminate much for me. :) >In ECROS, you use a printf-like function specifying the UART stream >as the destination. This returns "immediately", having stored the >outp
2004-09-07 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > > > How exactly do you "send" an event to a task? > > There is an ECROS function to do this. > That didn't really illuminate much for me. :) OK, sorry, Dave. In ECROS, every task has its own set of eight events it can respond
2004-09-07 by Dave VanHorn
> >The OS itself doesn't really do polling. Obviously, supporting devices >which don't generate interrupts would require some type of timer based >polling. > >So, in an RTOS, the highest priority ready-to-run thread is always >running. Context switches occur whenever something ca
2004-09-07 by Dave Hylands
Hi Dave, I don't know about AvrX, but most RTOS systems have a "ready" queue. At each timer tick, or logical yield point (like giving a semaphore, or when one thread blocks), the OS starts running the first entry on the ready queue. The ready queue is normally maintained in prior
2004-09-07 by Dave VanHorn
> >In your example, below, things that don't generate interrupts need to be >polled. There is no way to get around that. In AvrX the way to handle that >is to put a little code into the timer interrupt handler that generates the >"handshake" event when state changes and then have
2004-09-07 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Dave Hylands" wrote: > ... So, in an RTOS, the highest > priority ready-to-run thread > is always running... This and the rest of your explanation applies to preemptive systems. As there seems to be no objection to the direction this discussion t
2004-09-07 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > ... so there is then a list of tasks > that are ready to be executed, which > you drop through. Eventually, you hit > the end, and start over, or just sit > in a loop waiting for more tasks to do? In ECROS, multiple lists (qu
2004-09-07 by Larry Barello
AvrX (my RTOS) works similarly: there is no polling. An event (implemented as a call to the RTOS) causes some queues to shift and (potentially) a different task is running upon exit. Polling a bunch of bits in the depths of a kernel is one way to do things, but not the only way.
2004-09-07 by Dave VanHorn
> >No, this is not true. My cooperative multi-tasking operating system, >ECROS (see http://ecros.ecrostech.com), includes an event mechanism. >There is no polling. When an event is sent to a task, the task is >queued for execution if that event causes its ready condition to be >s
2004-09-07 by Graham Davies
--- In AVR-Chat@yahoogroups.com, Dave VanHorn wrote: > At 11:27 PM 9/6/2004, stevech wrote: > > > Adding events to unsuspend a > > task (process) in a cooperative > > multitasking system can > > eliminate such polling. > > Well, you still have to poll the > events somehow or othe
2004-09-07 by Dave VanHorn
At 11:27 PM 9/6/2004, stevech wrote: >Adding events to unsuspend a task (process) in a cooperative multitasking >system can eliminate such polling. Well, you still have to poll the events somehow or other. >Event triggers can come from an an interrupt or another task. >An example
2004-09-07 by stevech
Adding events to unsuspend a task (process) in a cooperative multitasking system can eliminate such polling. Event triggers can come from an an interrupt or another task. An example of such is OPEX for the AVR, in the AVRfreaks.net academy file archives. -----Original Message----