Interesting TIA design

"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...

Any possibility of an online whiteboard, You guys can all draw pieces and parts and add corrections as needed. Maybe a large format so you would left click and hold to move the board from side to side and up/down. I don't know how it would be done, but it could be neat. Oh, I heard google is my friend!

I've been in a cave for a while :-) Looks like it's been done. I haven't vetted any of these, but they have possibility!

Mike

Hmmm... Adapt a standard HDTV display with a touch sensitive surface and a drawing program, and you have a whiteboard/telestrator for the conference room!

Charlie

The last link looks pretty good but seems to be missing the eraser.

ces and

No, it doesn't work. A static electronic screen and mouse (or worse, touchpad) doesn't have the same eye-brain-arm connection that a whiteboard does. There is something about drawing in person that is orders of magnitude more plastic than anything on a computer. I can't think while manipulating pixels, but I can think while writing.

When I wanted to do a complete layout of this circuit, I did it on a full sheet of newsprint. Old crummy stuff, it ain't vellum, but it was on hand. Then I put it on the computer (in A4 size sections).

Tim

At the first-concept level, computer CAD really slows me down, especially if I'm considering using parts that aren't in the library. And brainstorming with multiple people works very well on a whiteboard

And with a whiteboard, you can physically block people who are trying to muck with your beautiful creation.

Yup, I do my schematics with pencil on D-size vellum, and give them to The Brat to cad for me.

John

But don't overdo it. She may some day be the one deciding which nursing home your are going to live at ...

She'll give John the Norwegian burning boat treatment ;-) ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

ALL my parts are already in my library. If not, if I feel _custom_ coming on, I just spin my own ;-) ...Jim Thompson

Heck, all of engineering, including me, are working for her already.

R wants her to do FPGA design next. So I'm scheduled to do a couple of lectures on basic digital design concepts, and then he'll do a couple on FPGAs and VHDL in particular.

John

On a sunny day (Tue, 27 Oct 2009 17:45:49 -0700 (PDT)) it happened Tim Williams wrote in :

Yep, ftp://panteltje.com/pub/fdc-1.jpg ftp://panteltje.com/pub/fdc-2.jpg Note the date (top right).

Wow, an ancient manuscript. Didn't they have ruled vellum in those days? Of course then you wouldn't be able to trace the prehistory of the MS by looking at the incomplete erasing. ;)

Cheers

Phil Hobbs (Proud owner of a lifetime supply of Clearprint)

I've got three 11"*17" Clearprint pads, still fairly full. I think there'll still be some of it left over when I leave this earth. To be honest, I use maybe one or two sheets per year. Most new designs get entered straight into SPICE and from there to CAD. I wish CAD and SPICE were integrated because the transcribing process carries risks.

Count yourself lucky that you have a daughter with a serious interest in business. I've witnessed the opposite. Offspring of client's president sitting in on my design review, didn't understand much, threw in the towel. Back when I started out that was different. You bit into it and tried to understand it, piece by little piece. For my first job I did not have the foggiest what they might possibly do with depth sounders on humans. Many late night studies, later long discussions with an engineer there, a couple months later I was designing parts of the front end of an ultrasound system. And it worked ...

I tossed all those... they take up too much room, and I never use them.

I even sold my E-size plotter 15 years ago ;-) ...Jim Thompson

So where in this benighted continent - i.e. Europe - can I obtain this miraculous parchment? Anyone know? A3 or A4 would be nice!

John Larkin guarantees it will increase my IQ by 10 points and allow me to become a Real Engineer at last.

(I tried printing out a faint squared pattern on my laserjet and it's not bad. But I feel I am missing out on the true experience).

Dunno. But first class vellum is beautiful--you can erase something 10 times and it looks like you got it right the first time. (Which might have something to do with the apparent IQ increase.) ;) If you aren't allergic to inches, the good stuff is 1000H 1010 with the blue fadeout grid.

Their international dealer list is at

Cheers

Phil Hobbs

Not sure if they carry them any longer but check with an arts supply store and ask to see some "Strathmore-Bristol" pads. US-made, but when I was living in Europe they were occasionally available then. A very good stationery store may even be able to order the Clearprint pads for you.

Or EBay, ask them if they have ruled varieties:

This

ftp://jjlarkin.lmi.net/FilterBoard.jpg

becomes this:

ftp://jjlarkin.lmi.net/Filter1.jpg

ftp://jjlarkin.lmi.net/Filter2.jpg

John

Easy on the solder paste there, guys ... :-)