exxos's Atari, Amiga & retro forum

exxos wrote: 23 Apr 2018 17:46
If anything, the squares might have to be fraction smaller than the CPU. Square is actually quite hard to fit in even with just one row of pins inserted.

Are the pins hard to fit if the square goes in first?

rubber_jonnie wrote: 24 Apr 2018 09:11 Are the pins hard to fit if the square goes in first?

I tried one row, needs a bit more of a push as expected. Still pretty easy.. just aligning all 4 to the socket when inserting the booster is the hardest part.

What type of pins should I test with?

Basically I made one with the exact measurements you gave and printed on "high quality" and it fits really well ... but if I can test myself before sending to you I might be able to iterate the design somewhat :)

troed wrote: 30 Apr 2018 17:25 What type of pins should I test with?

Basically I made one with the exact measurements you gave and printed on "high quality" and it fits really well ... but if I can test myself before sending to you I might be able to iterate the design somewhat :)

Looking nice! I am not sure what the pins are, I think they are 1mm pitch.. Maybe Best if I post you a few strips ?

I'll try to source some locally :) The pitch is 1.27mm?

https://www.mouser.se/ProductDetail/3M- ... x4uxl14%3d

If so I can get headers from here when driving home from work: https://www.electrokit.com/stiftlist-1-27mm-1x40p.51493

Bought a good caliper today to check what accuracy I got from the printer. 24.35x24.40 (from 24.40 in the CAD model). I'm happy with that ...

/Troed

troed wrote: 01 May 2018 20:19 I'll try to source some locally :) The pitch is 1.27mm?

I believe so yes.

troed wrote: 01 May 2018 20:19 Bought a good caliper today to check what accuracy I got from the printer. 24.35x24.40 (from 24.40 in the CAD model). I'm happy with that ...

Is pretty good! :thumbup:

New PCB arrived a couple days ago. If I ever get five seconds piece, might actually get to build this up some point! :roll:

exxos wrote: 01 May 2018 20:48

troed wrote: 01 May 2018 20:19 I'll try to source some locally :) The pitch is 1.27mm?

I believe so yes.

I bought a few 1.27mm headers but I must confess that they fit just as "badly" IMHO with or without the dummy CPU. Of course, I don't really know what a "good fit" should be like ... maybe I should just send you a dummy? :)

/Troed

troed wrote: 08 May 2018 13:48 I bought a few 1.27mm headers but I must confess that they fit just as "badly" IMHO with or without the dummy CPU. Of course, I don't really know what a "good fit" should be like ... maybe I should just send you a dummy? :)

When you insert the pins, the socket tabs get pushed out a fraction.. the square should at least partly stop that from happening..

New DualTOS prototype boards arrived..

These are similar to previous versions, but I've done away with the socket and made the board a fraction smaller. Boards also include UBE circuit, but not important for current booster work.. now to find time to build and test...