AVR-Chat

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 put mmbt in front of the number in
the search instead of 2N.  I stumbled across them when looking through
the paper catalog for something else.

mmbt3906
mmbt3904

I am not an expert with transistors but I think these are the same 
type but in a different package.

Craig

So what is a biologist doing with 500 transistors, anyhow...some 
weird Venus Flytrap robot?

Mike


--- In AVR-Chat@yahoogroups.com, "Daniel Boyer" <dpboyer@d...> wrote:

> Thanks for all the help... I went to Mouser and they were only $0.03
> each in quantitys of 250, so I ordered 500 NPNs and 250 PNPs... That
> should keep me set for a while. (plus I was able to order some chips
> that Digikey doesn't carry.)
> Thanks again,
> Daniel

Thanks for all the help... I went to Mouser and they were only $0.03
each in quantitys of 250, so I ordered 500 NPNs and 250 PNPs... That
should keep me set for a while. (plus I was able to order some chips
that Digikey doesn't carry.)
Thanks again,
Daniel

> So what is a biologist doing with 500 transistors, anyhow...some 
> weird Venus Flytrap robot?
> 
> Mike

Actually, I'm a biologist with TOO MANY hobbies... Lately I have been
building various electronic shutter release devices for my digital SLR
camera (so far I've built an 433mhz wireless trigger, broken-beam
trigger, lightning trigger, sound trigger, and I am getting ready to
build an ultrasonic motion detector based trigger (last part is on the
mouser order), and have plans for a couple of computer interface
circuits).  I'm just one of those people who can't stand to be bored,
and I love learning new things, so I have picked up lots of hobbies
(much to my wife's dismay).
Daniel
KC9DAG

> lightning trigger

Is this based on the radio waves that often come before the lightning 
strike?

Mike


--- In AVR-Chat@yahoogroups.com, "Daniel Boyer" <dpboyer@d...> wrote:
> 
> > So what is a biologist doing with 500 transistors, anyhow...some 
> > weird Venus Flytrap robot?
> > 
> > Mike
> 
> Actually, I'm a biologist with TOO MANY hobbies... Lately I have 
been
> building various electronic shutter release devices for my digital 
SLR
> camera (so far I've built an 433mhz wireless trigger, broken-beam
> trigger, lightning trigger, sound trigger, and I am getting ready to
> build an ultrasonic motion detector based trigger (last part is on 
the
> mouser order), and have plans for a couple of computer interface
> circuits).  I'm just one of those people who can't stand to be 
bored,

> and I love learning new things, so I have picked up lots of hobbies
> (much to my wife's dismay).
> Daniel
> KC9DAG

I built one. It works. Took a couple of hours to lay out and cut a simple 
pcb and program a spare m163 laying around.
   Is it better then brand name jtag-ice ? Not really. but it is an awful 
lot cheaper.

  Unless you are counting every penny (substitute appropriate small 
denomination coin) It might be better to just get one from olimex.

  Now if somebody would come up with a dirt cheap one wire debug. I really 
want another way to debug mega8s (mega88).

-carl


At 05:45 PM 9/11/2004, you wrote:

>Hi
>
>Anyone , build this circuit ??
>
><http://avr.openchip.org/bootice/old_index.html>http://avr.openchip.org/bootice/old_index.html
>
>I like know, if is a better circuit to JTAG ICE
>
>Emerson Santos
>·
>Yahoo! Groups Sponsor
>ADVERTISEMENT

hi
did you see ponyprog web page?
there is beter programer circuit(si prog):
http://www.lancos.com/prog.html

Emerson Santos <emersonsantosrj@uol.com.br> wrote: 


v\:* {behavior:url(#default#VML);}o\:* {behavior:url(#default#VML);}w\:* {behavior:url(#default#VML);}.shape {behavior:url(#default#VML);}st1\:*{behavior:url(#default#ieooui) }
Hi

 

Anyone , build this circuit ??



http://avr.openchip.org/bootice/old_index.html

 

I like know, if is a better circuit to JTAG ICE

 

Emerson Santos



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Hi Abbas
 
Yes, I know the circuit in lancos pages ... But I'm like try a cheap JTAG
interface

-----Original Message-----
From: abbas raftari [mailto:araftary1@yahoo.com] 
Sent: Sunday, September 12, 2004 7:05 AM
To: AVR-Chat@yahoogroups.com
Cc: emersonsantosrj@uol.com.br
Subject: Re: [AVR-Chat] JTAG ICE


hi
did you see ponyprog web page?
there is beter programer circuit(si prog):
http://www.lancos.com/prog.html

Emerson Santos <emersonsantosrj@uol.com.br> wrote: 

Hi

 

Anyone , build this circuit ??



http://avr.openchip.org/bootice/old_index.html

 

I like know, if is a better circuit to JTAG ICE

 

Emerson Santos


 
<http://us.adserver.yahoo.com/l?M=295196.4901138.6071305.3001176/D=groups/S=
:HM/A=2128215/rand=320412599> 

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For anybody who wants it, I just tossed up the schematic and pcb artwork 
for my JTAG design onto my projects page.
  If you already have the parts laying around and really want to roll your 
own. Pretty easy to build if you can make your own PCBs.
  Instructions for doing that with toner transfer paper also on the site.

  Mixed dip and smd design.

http://users.rcn.com/carlott/projects.html


l8r


At 09:06 PM 9/11/2004, you wrote:

>   I built one. It works. Took a couple of hours to lay out and cut a simple
>pcb and program a spare m163 laying around.
>    Is it better then brand name jtag-ice ? Not really. but it is an awful
>lot cheaper.
>
>   Unless you are counting every penny (substitute appropriate small
>denomination coin) It might be better to just get one from olimex.
>
>   Now if somebody would come up with a dirt cheap one wire debug. I really
>want another way to debug mega8s (mega88).
>
>-carl

Does this design/bootloader work with Mega16?

-----Original Message-----
From: Henry Carl Ott 


For anybody who wants it, I just tossed up the schematic and pcb artwork 
for my JTAG design onto my projects page.
  If you already have the parts laying around and really want to roll your 
own. Pretty easy to build if you can make your own PCBs.
  Instructions for doing that with toner transfer paper also on the site.

  Mixed dip and smd design.

http://users.rcn.com/carlott/projects.html

There does appear to be a mega16 loader listed on the original site, but 
possibly with issues
  http://avr.openchip.org/bootice/old_index.html

  I only tested the design with an m163

-carl


At 03:27 PM 9/12/2004, you wrote:

>Does this design/bootloader work with Mega16?
>
>-----Original Message-----
>From: Henry Carl Ott
>
>
>For anybody who wants it, I just tossed up the schematic and pcb artwork
>for my JTAG design onto my projects page.
>   If you already have the parts laying around and really want to roll your
>own. Pretty easy to build if you can make your own PCBs.
>   Instructions for doing that with toner transfer paper also on the site.
>
>   Mixed dip and smd design.
>
>http://users.rcn.com/carlott/projects.html

--- In AVR-Chat@yahoogroups.com, "Emerson Santos" 
<emersonsantosrj@u...> wrote:

> Anyone , build this circuit ??
> http://avr.openchip.org/bootice/old_index.html 
> I like know, if is a better circuit to JTAG ICE

There are several "clones" of the JTAG-ICE available using variations 
of this circuit. They lack many features of the JTAG ICE, but also 
lack the $300 price tag. The Olimex was the first, I think, but I 
would not recommend this. The design is very poor. So poor, in fact, 
that I have also designed a JTAG ICE clone, which I will soon be 
offering in production for about $40.00 US, shipping worldwide. For a 
preview, please see:
http://www.ecrostech.com/Products/AvrJtagIce/Intro.htm

Making your own JTAG ICE is a nice project. But, if you want a JTAG 
ICE to use to get work done, for heaven's sake buy one. By the time 
you've had a PCB made your own will cost you more. Also, as soon as 
something is not working, how do you know whether it's the target 
system or the JTAG ICE? I have designed my JTAG ICE very carefully to 
avoid any possible interference with the target system either through 
EMI or power supply coupling. It is also so small it requires no desk 
space and sits on the target system connector.

Graham.

When can we look forward to your device being ready to 
ship, Graham?

Brian Aase

> There are several "clones" of the JTAG-ICE available using variations 
> of this circuit. They lack many features of the JTAG ICE, but also 
> lack the $300 price tag. The Olimex was the first, I think, but I 
> would not recommend this. The design is very poor. So poor, in fact, 
> that I have also designed a JTAG ICE clone, which I will soon be 
> offering in production for about $40.00 US, shipping worldwide. For a 
> preview, please see:
> http://www.ecrostech.com/Products/AvrJtagIce/Intro.htm
> 
> Making your own JTAG ICE is a nice project. But, if you want a JTAG 
> ICE to use to get work done, for heaven's sake buy one. By the time 
> you've had a PCB made your own will cost you more. Also, as soon as 
> something is not working, how do you know whether it's the target 
> system or the JTAG ICE? I have designed my JTAG ICE very carefully to 
> avoid any possible interference with the target system either through 
> EMI or power supply coupling. It is also so small it requires no desk 
> space and sits on the target system connector.
> 
> Graham.
> 
> 
> 
>                        Yahoo! Groups Sponsor
> 
>                            ADVERTISEMENT
>                              click here
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> 
> 
> 
> 
> 
> Yahoo! Groups Links
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>     Service. 
>

No, this one is light based since it is designed to fire the camera
shutter when it "sees" a bolt of lightning with in the camera's field of
view.  I have a bunch of schematics for RF based lighting detectors and
I may build one when I get done with the current set of projects.
Daniel

> -
> > lightning trigger
> 
> Is this based on the radio waves that often come before the lightning 
> strike?
> 
> Mike
>

--- In AVR-Chat@yahoogroups.com, brian.aase@v... wrote:

> When can we look forward to
> your device being ready to 
> ship, Graham?
> 
> Brian Aase

I will have production units in two to three weeks. I just need to 
send away for the printed circuit boards to be manufactured. I have 
one prototype unit available. The only difference is that the PCB has 
no solder masks or silkscreen. Electrically, it is identical. If 
anyone wants this, it would be $34.95, i.e. a $5.00 discount. I ship 
by USPS Priority Mail in the USA for $5.00 and air-mail to other 
countries for $10.00. Thank you for your interest and for tolerating 
my advertising!

Graham.

--- In AVR-Chat@yahoogroups.com, Henry Carl Ott <carlott@i...> wrote:
> There does appear to be a mega16 loader listed on the original 
site, but 
> possibly with issues

Try this Bootloader

http://www.microsyl.com/megaload/megaload.html

It does need Codevision CC for building , but the free Codevision 
does fine with this little program.

It should be rather easy to port to GCC Btw.

I used it for a Mega32 , and it works perfect.


/Bingo