OT Fun: Sleuth who did this schematic...

[Fred Bloggs]

On Friday, September 4, 2020 at 11:22:28 AM UTC-4, silver...@charter.net wrote:

On Thursday, September 3, 2020 at 8:05:32 PM UTC-4, Chris wrote:
On 09/03/20 23:27, Silvar Beitel wrote:
Seeing Pimpom\'s, JL\'s, and others posts of hand-drawn schematics recently makes me finally get around to dumping this question on you:

Last January, I stayed at a B&B in Tucson, AZ. On the wall of the bathroom was this bit of \"art\":

https://photos.app.goo.gl/K4XuxmhADMaVq7Uc9

Do any of you recognize it as being your work? Just a shot in the dark.

(The place and host were great, BTW.)


Not me, but cool, especially if the lady understands electronics...

Chri
No. She\'s an artist and art professor at UoA. She converted her large garage into a studio and has artwork (not just hers) *everywhere*. This particular item was in the guest room bathroom, behind the door. Perhaps a subtle indication of what she thinks of engineers.

--
Silvar Beitel

Is this her?
https://www.barbarapenn.com/biography
Dunno about the idiot schematic, not worth knowing either.

 

[Jasen Betts]

On 2020-09-04, Clive Arthur <clive@nowaytoday.co.uk> wrote:

On 04/09/2020 00:55, bitrex wrote:
On 9/3/2020 6:27 PM, Silvar Beitel wrote:
Seeing Pimpom\'s, JL\'s, and others posts of hand-drawn schematics
recently makes me finally get around to dumping this question on you:

Last January, I stayed at a B&B in Tucson, AZ.  On the wall of the
bathroom was this bit of \"art\":

https://photos.app.goo.gl/K4XuxmhADMaVq7Uc9

Do any of you recognize it as being your work?  Just a shot in the dark.

(The place and host were great, BTW.)


bringing up soldering isn\'t a bad pick-up line depending on the lady no
joke

Yeah, but telling here she\'s at best a class A-B, potentially unstable
and hard of hearing isn\'t cool.

If she were a class A she\'d be hot.

Obviously drawn by a very old bloke, or maybe someone from a backward
country. I mean, who uses .22 rather than 220n?

Also zig-zag resistors and a non-ISO paper size, still, that seems a
little harsh on USA.

--
Jasen.

 

[Michael_A_Terrell]

Phil Hobbs wrote:

On 2020-09-04 06:10, Clive Arthur wrote:
On 04/09/2020 00:55, bitrex wrote:
On 9/3/2020 6:27 PM, Silvar Beitel wrote:
Seeing Pimpom\'s, JL\'s, and others posts of hand-drawn schematics
recently makes me finally get around to dumping this question on you:

Last January, I stayed at a B&B in Tucson, AZ. On the wall of the
bathroom was this bit of \"art\":

https://photos.app.goo.gl/K4XuxmhADMaVq7Uc9

Do any of you recognize it as being your work? Just a shot in the
dark.

(The place and host were great, BTW.)


bringing up soldering isn\'t a bad pick-up line depending on the lady
no joke

Yeah, but telling here she\'s at best a class A-B, potentially unstable
and hard of hearing isn\'t cool.

If she were a class A she\'d be hot.

Obviously drawn by a very old bloke, or maybe someone from a backward
country. I mean, who uses .22 rather than 220n?


It\'s not uncommon for schematics to have a note saying \"All capacitances
in microfarads unless noted.\"

Even Digikey doesn\'t seem to know about nanofarads.

And that amp better have a nice low offset voltage.

I remember seeing nF used on some schematics for US built consumer
electronics that was printed in the \'50s and early \'60s. They had
disappeared by the mid \'60s. At 13 years old, the extra unit seemed
quite silly.


--
Never piss off an Engineer!

They don\'t get mad.

They don\'t get even.

They go for over unity! ;-)

 

[Pimpom]

On 9/5/2020 2:26 AM, Phil Hobbs wrote:

On 2020-09-04 11:27, Chris wrote:
On 09/04/20 14:45, Phil Hobbs wrote:
On 2020-09-04 06:10, Clive Arthur wrote:
On 04/09/2020 00:55, bitrex wrote:
On 9/3/2020 6:27 PM, Silvar Beitel wrote:
Seeing Pimpom\'s, JL\'s, and others posts of hand-drawn schematics
recently makes me finally get around to dumping this question on you:

Last January, I stayed at a B&B in Tucson, AZ.  On the wall of the
bathroom was this bit of \"art\":

https://photos.app.goo.gl/K4XuxmhADMaVq7Uc9

Do any of you recognize it as being your work?  Just a shot in the
dark.

(The place and host were great, BTW.)


bringing up soldering isn\'t a bad pick-up line depending on the lady
no joke

Yeah, but telling here she\'s at best a class A-B, potentially unstable
and hard of hearing isn\'t cool.

If she were a class A she\'d be hot.

Obviously drawn by a very old bloke, or maybe someone from a backward
country.  I mean, who uses .22 rather than 220n?


It\'s not uncommon for schematics to have a note saying \"All capacitances
in microfarads unless noted.\"

Even Digikey doesn\'t seem to know about nanofarads.

And that amp better have a nice low offset voltage.

Cheers

Phil Hobbs


I think nF is quite common in europe, but every experienced engineer
should know that the default is microfarads and what .22 means. It\'s
consistent with 10u and more succinct, .22, rather than 220nF,
3 chars instead of 5...

Chris


Being from the days of multiply-Xeroxed schematics, I never use leading
decimal points. Thus it would be 0.22, except that I do use nanofarads.
For a 2200 pF cap I write \'2n2\'.

I do the same thing generally. 2n2 and 1k5 prevent many
possible misreads, although I don\'t use them exclusively. 0µ22,
2µ2, 4E7 look odd to me.

I remember the first time I used this style in a sim. It seemed
to work but I quickly found that it ignored the number after the
decimal point.

 

[Pimpom]

On 9/4/2020 7:46 PM, Ricketty C wrote:

On Friday, September 4, 2020 at 12:25:54 AM UTC-4, Pimpom wrote:
On 9/4/2020 3:57 AM, Silvar Beitel wrote:
Seeing Pimpom\'s, JL\'s, and others posts of hand-drawn schematics recently makes me finally get around to dumping this question on you:

Last January, I stayed at a B&B in Tucson, AZ. On the wall of the bathroom was this bit of \"art\":

https://photos.app.goo.gl/K4XuxmhADMaVq7Uc9

Do any of you recognize it as being your work? Just a shot in the dark.

(The place and host were great, BTW.)


Cute, but not mine. I\'m too old for one-night stands.

What, are you in the grave?

Not quite yet. Having a wife who still turns heads in a crowd as
she approaches 60 helps.

 

[Silvar Beitel]

On Friday, September 4, 2020 at 12:46:45 AM UTC-4, Piotr Wyderski wrote:

Silvar Beitel wrote:

https://micro.magnet.fsu.edu/creatures/pages/wedding.html

Best regards, Piotr

Back in the day, we did allow mask designers (and engineers and techs) to plop their initials into some unused space on our chips. It wasn\'t possible for the jelly beans, but for LSI/VLSI, since there was no way any floor plan could cram circuitry into every corner of a chip (especially pad-limited ones), a bit of \"artistry\" was deemed OK. We certainly weren\'t the only ones. Check out images of just about any chip of any size from the dawn of chip-dom to today.

--
Silvar Beitel