Forums

another strange board

Started by Unknown November 20, 2021
https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1

The real action is in the upper-right, 0.8 square inches. I had to lay
that out myself because it's too hard to explain to anyone else.

The Brat did the rest of the layout.

Production wants the wings on the sides for fixturing. After the parts
are stuffed, we can lop them off.



-- 

Father Brown's figure remained quite dark and still; 
but in that instant he had lost his head. His head was
always most valuable when he had lost it.



  
jlarkin@highlandsniptechnology.com wrote:
> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 > > The real action is in the upper-right, 0.8 square inches. I had to lay > that out myself because it's too hard to explain to anyone else. > > The Brat did the rest of the layout. > > Production wants the wings on the sides for fixturing. After the parts > are stuffed, we can lop them off.
Why do the 2,3 and 4 markings have different orientations?
On Sun, 21 Nov 2021 03:10:21 -0000 (UTC), Cydrome Leader
<presence@MUNGEpanix.com> wrote:

>jlarkin@highlandsniptechnology.com wrote: >> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 >> >> The real action is in the upper-right, 0.8 square inches. I had to lay >> that out myself because it's too hard to explain to anyone else. >> >> The Brat did the rest of the layout. >> >> Production wants the wings on the sides for fixturing. After the parts >> are stuffed, we can lop them off. > >Why do the 2,3 and 4 markings have different orientations?
In the SMA footprints? Those are pin numbers, which can be made visible during layout but don't get into the fab files. Actually, all the parts show these pin numbers if you zoom up. It helps doing the layout. I don't know how PADS decides to orient them. Those three breakaway wings are freebie little PCBs. I might use the long one for a TDR trace impedance test. I could make a capacitor out of one to measure Er. Or something. -- Father Brown's figure remained quite dark and still; but in that instant he had lost his head. His head was always most valuable when he had lost it.
jlarkin@highlandsniptechnology.com wrote:
> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 > > The real action is in the upper-right, 0.8 square inches. I had to lay > that out myself because it's too hard to explain to anyone else. > > The Brat did the rest of the layout. > > Production wants the wings on the sides for fixturing. After the parts > are stuffed, we can lop them off. >
How do you expect the rectengular outline in middle right to get produced? -- Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt --------- Tel. 06151 1623569 ------- Fax. 06151 1623305 ---------
s&oslash;ndag den 21. november 2021 kl. 02.47.11 UTC+1 skrev jla...@highlandsniptechnology.com:
> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 >
can you actually get a v-score made that doesn't go all the way across the board?
jlarkin@highlandsniptechnology.com wrote:
> On Sun, 21 Nov 2021 03:10:21 -0000 (UTC), Cydrome Leader > <presence@MUNGEpanix.com> wrote: > >>jlarkin@highlandsniptechnology.com wrote: >>> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 >>> >>> The real action is in the upper-right, 0.8 square inches. I had to lay >>> that out myself because it's too hard to explain to anyone else. >>> >>> The Brat did the rest of the layout. >>> >>> Production wants the wings on the sides for fixturing. After the parts >>> are stuffed, we can lop them off. >> >>Why do the 2,3 and 4 markings have different orientations? > > In the SMA footprints? Those are pin numbers, which can be made > visible during layout but don't get into the fab files. Actually, all > the parts show these pin numbers if you zoom up. It helps doing the > layout. I don't know how PADS decides to orient them. > > Those three breakaway wings are freebie little PCBs. I might use the > long one for a TDR trace impedance test. I could make a capacitor out > of one to measure Er. Or something.
The snap-offs aren't special to anyone who has seen boards being assembled. Add a logo and make them into keychains? I've seen board scraps turned into mechanical parts before too.
On 21/11/2021 15:47, Lasse Langwadt Christensen wrote:
> s&oslash;ndag den 21. november 2021 kl. 02.47.11 UTC+1 skrev jla...@highlandsniptechnology.com: >> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 >> > > can you actually get a v-score made that doesn't go all the way across the board? >
Err no... -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
On 21 Nov 2021 12:05:19 GMT, Uwe Bonnes
<bon@hertz.ikp.physik.tu-darmstadt.de> wrote:

>jlarkin@highlandsniptechnology.com wrote: >> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 >> >> The real action is in the upper-right, 0.8 square inches. I had to lay >> that out myself because it's too hard to explain to anyone else. >> >> The Brat did the rest of the layout. >> >> Production wants the wings on the sides for fixturing. After the parts >> are stuffed, we can lop them off. >> > >How do you expect the rectengular outline in middle right to get produced?
The board house will route it out; radiuses are OK in the corners. After assembly, we can cut through the v-scores to make the final shape, a nearly square board with a rectangular cutout for the lower cable. Two of the SMA edge-launch connectors will be on a precise routed edge. The one on the right will be on a cut-off v-score, so it won't be a precise fit against the board edge and won't be a good high-frequency match, but that's OK... it's a signal monitor with only a 1 GHz requirement and no hard specs on signal beauty. The next iteration: https://www.dropbox.com/s/1nf2db5f7wb4xkz/T502A5.jpg?raw=1 The SMA connectors are now the Mueller microwave edge-launch parts, pretty good without costing $40 each. For the best transition, the pads have to be just at the edge of the board, marginally routed off. The design review is tomorrow. Yuk. -- Father Brown's figure remained quite dark and still; but in that instant he had lost his head. His head was always most valuable when he had lost it.
On Sun, 21 Nov 2021 07:47:21 -0800 (PST), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>s&#2013266168;ndag den 21. november 2021 kl. 02.47.11 UTC+1 skrev jla...@highlandsniptechnology.com: >> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 >> > >can you actually get a v-score made that doesn't go all the way across the board?
Can't see why not. We'll buy from the board house that will. It could be converted into slots if nobody will do it. That would give me a clean edge on the right-most SMA. It's just harder to draw. -- Father Brown's figure remained quite dark and still; but in that instant he had lost his head. His head was always most valuable when he had lost it.
On 22/11/21 5:06 am, jlarkin@highlandsniptechnology.com wrote:
> On Sun, 21 Nov 2021 07:47:21 -0800 (PST), Lasse Langwadt Christensen > <langwadt@fonz.dk> wrote: > >> s&oslash;ndag den 21. november 2021 kl. 02.47.11 UTC+1 skrev jla...@highlandsniptechnology.com: >>> https://www.dropbox.com/s/do0k7ystcmmu1xg/T502A4.jpg?raw=1 >>> >> >> can you actually get a v-score made that doesn't go all the way across the board? > > Can't see why not. We'll buy from the board house that will.
Each snap must go right across the remaining board, or they can't snap it. Any v-score will run a bit past its notional end-point, and mustn't run into another board. That's possible to ensure by insisting on the scores running across the board.