Re: breadboarding fast, tiny stuff
- From: Martin Griffith <mart_in_medina@xxxxxxxx>
- Date: Mon, 03 Mar 2008 23:16:50 +0100
On Mon, 03 Mar 2008 21:11:57 GMT, in sci.electronics.design Joerg
<notthisjoergsch@xxxxxxxxxxxxxxxxxxxxx> wrote:
John Larkin wrote:
On Sun, 02 Mar 2008 16:53:59 -0800, Joerg
<notthisjoergsch@xxxxxxxxxxxxxxxxxxxxx> wrote:
JosephKK wrote:
On Sat, 01 Mar 2008 21:22:26 -0800, John LarkinThe zip format is widely used in industry. How else would you beam photo
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Sun, 02 Mar 2008 05:02:18 GMT, JosephKK <quiettechblue@xxxxxxxxx>The actual issue is a hosed client the mishandles zips.
wrote:
John Larkin wrote:You can't unzip files? I zip a lot of stuff, because a lot of my
On Sat, 01 Mar 2008 18:58:28 GMT, JosephKK <quiettechblue@xxxxxxxxx>My complaint was not about the price but the usability. I can use jpeg
wrote:
John Larkin wrote:I'm offering free data and advice, and you're whining about the price.
We got some samples of an NEC hj fet and were wondering what itsHell, you have a webpage to work with post gif's not zip's.
time-domain response might be like. The part is only 2x2 mm and the
leads are 1.2 mm pitch, and I hadn't previously had a lot of luck
breadboarding stuff like this.
We found two tricks:
Get a piece of copperclad, epoxy-glass or preferably teflon; the
teflon is easier to cut. Cut out "pads" with a very sharp xacto knife,
under a Mantis magnifier. This will make horrible burrs and shorts, so
the first trick is to scrub it really hard with a Scotchbrite pad
between cuts. This cleans it up beautifully.
The second trick is to use small patches of kapton tape as insulators.
like where parts join or whatever. Soldering doesn't bother it at all.
ftp://66.117.156.8/FetTest.zip
Here, the fet is in a first-pass test circuit, just to see how fast we
can turn it on and off. The TDR pulse from the sampling head is the
gate drive, 0 (Idss) to -0.5 (pretty much off) at 50 ohms source z.
The drain is pulled up through a 47 ohm resistor, and the 150 ohm
resistor off to the side is an "attenuator" into the other scope
channel. The turnon fall is very clean, no nasty ringing or whatever,
with a 190 ps fall time. Turnoff is similar; these things don't store
charge! The TDR of the gate (lower trace) indicates that the gate
capacitance is loading the drive, so we need a bigger gate swing, from
a lower source impedance, to make this thing switch really fast. That
will be next.
John
And it's not a web page, it's an FTP site.
And my camera makes jpeg's, not gif's.
Did I leave anything out?
John
and svg and png as well. Zips are problematic. Maybe a pdf or a tgz?
customers have firewalls that don't let any interesting stuff in.
Sometimes I have to send files to their gmail accounts, or zip it and
rename it to .txt!
John
plotter files back and forth where a set easily consist of a dozen or
more individual files?
Lots of FPGA software automatically archives a project, hundreds of
files maybe, in zip format. That's also how we send pcb designs (10-20
files, maybe) to the board fab houses.
Same here. During the hot phase of the layout my layouter and I "zip"
files back and forth, sometimes at 15 minute intervals or less.
I do the same with hex files, with Skype, to my mate with a little
assembly shop in the yUK, and he just programs the protoype live, so
to speak, I just talk him through it, if needed
Skype is good, but just cancel the call as you send the file(s) and
it's much faster, then call back. PDQ
martin
.
- References:
- Re: breadboarding fast, tiny stuff
- From: JosephKK
- Re: breadboarding fast, tiny stuff
- From: John Larkin
- Re: breadboarding fast, tiny stuff
- From: JosephKK
- Re: breadboarding fast, tiny stuff
- From: John Larkin
- Re: breadboarding fast, tiny stuff
- From: JosephKK
- Re: breadboarding fast, tiny stuff
- From: Joerg
- Re: breadboarding fast, tiny stuff
- From: John Larkin
- Re: breadboarding fast, tiny stuff
- From: Joerg
- Re: breadboarding fast, tiny stuff
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