A 144in^2, sure will! ...and $7.50 is also a damned good price for a board this large, in production, too.
gold!
Feb 28, 2014
38 Replies
It will be a test circuit, to maybe improve the performance of a machine that costs $110 million. I intend to make it look nice.
John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
We paid $220 for the two boards, $110 per square foot.
John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
Yeah, the $7.50 comment was about the cost of the gold on the board, not its price. ;-)
Here's a breadboard, made with the gold FR4.
formatting link
formatting link
I've got to work on style a bit, but it's promising. It solders beautifully and should still look good when it gets to the customer.
John Larkin Highland Technology, Inc
jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
Nice. :-)
bling bling.
What sort of tape is that under the Bellin Systems boards? I usually use a largish drill bit to get rid of the bottom pads of the PTHs, so they don't short out to the ground plane.
Cheers
Phil Hobbs
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
hobbs at electrooptical dot net
http://electrooptical.net
Just 3M foam tape, like the picture-mounting stuff. Doesn't short to the ground plane as long as you don't dump a huge lot of solder onto the pads.
Hmmm, maybe I can deliberately do that and get grounds.
The power busses are crazy-glued down, your suggestion. The challenge is to do that without permamently attaching your finger to the board.
John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
WHY have those 2 left connector wiring crossed when there is NO need? The blue and orange wires can be straight, shorter, and non-interfering...
Or your tail...
We always value your insightful technical contributions to this newsgroup.
John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
I know, it was really disappointing to have those wires overlap. But I wanted the signal path connectors to be inline, and the gate input to be offset.
Life really sucks.
John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
But not, obviously, my acerbic wit.
John Fields
Obviously.
John Larkin Highland Technology, Inc
jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
Style over substance?
Tsk, tsk, tsk...
Pay attention. The wires overlapping was substance over style.
Best to do as much as possible before then.
John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
Short, direct connection is substance; abrogating that for the sake
of appearance is style over substance.
You can also use small bypass caps to tie down the power rails.
Mikko OH2HVJ
p.
I'm sure we will appreciate it when you get around to producing some.
adjective \?-?s?r-bik, a-\ : expressing harsh or sharp criticism in a clever way
So far you have managed to cover the "harsh" part. "Sharp" and "in a clever way" seem quite a long way off. "Insightful" isn't a tag I would have appl ied to your contributions either. John Larkin's threshold for "insightful" is quite likely to be lower than mine, but even so I suspect that he might have been being sarcastic.
Bill Sloman, Nijmegen
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required