Joe Gwinn wrote:
On Sat, 07 May 2022 13:18:48 -0700, jlarkin@highlandsniptechnology.com
wrote:
On Fri, 6 May 2022 20:10:23 -0600, rbowman <bowman@montana.com> wrote:
On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:
On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:
On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon
Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?
Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.
Seems kind of messy.
Why dissolve it? The gold plating cost $150 a square foot.
If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.
https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1
https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1
https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1
The big question is:
What difference does it make for those small proto boards if it is gold plated?
else it is just show.
It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.
https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1
Beautiful things work better.
Solder it and spray on the conformal coating of your choice.
No thanks. I like the gold.
As engineers, don\'t we need to come up with a pseudo technical reason,
like a gold surface is smoother and keeps its low surface resistivity
despite sweaty palms and caustic looks?
So something that looks like a Yugo is fine, as long as the mechanicals
underneath are good?
You must not have dealt with many customers.
On Sat, 7 May 2022 20:10:07 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
Joe Gwinn wrote:
On Sat, 07 May 2022 13:18:48 -0700, jlarkin@highlandsniptechnology.com
wrote:
On Fri, 6 May 2022 20:10:23 -0600, rbowman <bowman@montana.com> wrote:
On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:
On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:
On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon
Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?
Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.
Seems kind of messy.
Why dissolve it? The gold plating cost $150 a square foot.
If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.
https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1
https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1
https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1
The big question is:
What difference does it make for those small proto boards if it is gold plated?
else it is just show.
It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.
https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1
Beautiful things work better.
Solder it and spray on the conformal coating of your choice.
No thanks. I like the gold.
As engineers, don\'t we need to come up with a pseudo technical reason,
like a gold surface is smoother and keeps its low surface resistivity
despite sweaty palms and caustic looks?
So something that looks like a Yugo is fine, as long as the mechanicals
underneath are good?
You must not have dealt with many customers.
Many. Some have a sense of humor. This excludes Contracts, though.
But none would like a dead-bug implementation (which I do only in the
privacy of my own lab). Actually, I did do a project many years ago
where I packaged the logic circuitry in a tub of paraffin wax, for
mechanical robustness. If change or repair was need, melt wax, pour
out, make change, pour wax back in.
Joe Gwinn
Joe Gwinn wrote:
On Sat, 7 May 2022 20:10:07 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
Joe Gwinn wrote:
On Sat, 07 May 2022 13:18:48 -0700, jlarkin@highlandsniptechnology.com
wrote:
On Fri, 6 May 2022 20:10:23 -0600, rbowman <bowman@montana.com> wrote:
On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:
On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:
On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon
Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?
Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.
Seems kind of messy.
Why dissolve it? The gold plating cost $150 a square foot.
If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.
https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1
https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1
https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1
The big question is:
What difference does it make for those small proto boards if it is gold plated?
else it is just show.
It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.
https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1
Beautiful things work better.
Solder it and spray on the conformal coating of your choice.
No thanks. I like the gold.
As engineers, don\'t we need to come up with a pseudo technical reason,
like a gold surface is smoother and keeps its low surface resistivity
despite sweaty palms and caustic looks?
So something that looks like a Yugo is fine, as long as the mechanicals
underneath are good?
You must not have dealt with many customers.
Many. Some have a sense of humor. This excludes Contracts, though.
But none would like a dead-bug implementation (which I do only in the
privacy of my own lab). Actually, I did do a project many years ago
where I packaged the logic circuitry in a tub of paraffin wax, for
mechanical robustness. If change or repair was need, melt wax, pour
out, make change, pour wax back in.
Joe Gwinn
Depends.
Ten years or so ago, I built a *working* transcutaneous blood glucose
measurement system, made mostly out of optics from my drawer and
dead-bug electronics built in stomp boxes. (It also had some purchased
parts: an RC airplane servo and some aluminum angle from Servo City, a
diffraction grating, a LabJack 7 Pro, and a Thinkpad from eBay.
(I had a few
friends over for drinks, and we looked at all of our blood signals every
half hour or so. The data were crunched by some machine learning folks
from USC into good-looking data that matched the physiological estimates
based on sex, body mass and consumption rate.
Customer was very pleased indeed.
It was neatly (I had a few friends over for drinks, and we looked at all of our
blood signals every half hour or so. The data were crunched by
some machine learning folks from USC into good-looking data that
matched the physiological estimates based on sex, body mass and
consumption rate.
Customer was very pleased indeed.
But remembers little else?
Nope, just me. There were a few parts involved, some late nights, and
of course the statutory minimum quantity of JB Weld.
trimmed and painted flat black to make it less obvious.
On 05/08/2022 04:42 PM, Phil Hobbs wrote:
Nope, just me. There were a few parts involved, some late nights,
and of course the statutory minimum quantity of JB Weld.
neatly trimmed and painted flat black to make it less obvious.
Was it a one-off or did your client intend to go into production?