Page 1 of 1

NEW 30 PIN 1MB SIMM PRODUCTION 2ND BATCH

Posted: Tue Aug 22, 2017 10:20 pm
by exxos
30_pin_simm_pack.JPG
30_pin_simm_pack.JPG (285.8 KiB) Viewed 1387 times
More 30 pin simms being produced today.

First up I got a new "pasting jig" made. The engineer is likely no longer talking to me, but I got the design I wanted in the end and fantastic it is! Expensive, but I needed a way to speed up production as aligning the film by hand and taping the stencil on while pasting.. well.. basically took forever.

IMG_1722.JPG
IMG_1722.JPG (434.27 KiB) Viewed 1387 times
Pasting Frame with Plastic Stencil.


IMG_1724.JPG
IMG_1724.JPG (464.1 KiB) Viewed 1387 times
Really expensive SMT Paste going on...

IMG_1726.JPG
IMG_1726.JPG (692.91 KiB) Viewed 1387 times
All pasted ready for adding parts.

IMG_1727.JPG
IMG_1727.JPG (676.35 KiB) Viewed 1387 times
Parts on..

IMG_1728.JPG
IMG_1728.JPG (383.68 KiB) Viewed 1387 times
Into the oven to cook for a while..

IMG_1729.JPG
IMG_1729.JPG (305.15 KiB) Viewed 1387 times
Hot stuff!

IMG_1730.JPG
IMG_1730.JPG (506.06 KiB) Viewed 1387 times
Cleaned up and checked.. Then into my 32MHz STE for testing..

IMG_1731.JPG
IMG_1731.JPG (468.81 KiB) Viewed 1387 times
Job well done :) And Finally...

IMG_20170602_140446.jpg
IMG_20170602_140446.jpg (108.67 KiB) Viewed 1387 times
A cat picture :)


Simms are now on sale in my store.

Packs of 4. https://www.exxoshost.co.uk/atari/last/storenew/#0024



EDIT:

Simms now have one side with solder on the connection pads. Originally I had a thicker PCB, but it was a pain to fit. So I went for a thinner PCB only to find there was bad connections and a larger PCB would be better :roll: Turns out, that a lot of simms have a fair amount of solder on the pads and actually bend the sockets pins "out of spec". So when a "in-spec" simm board (the ones I make!) Tended not to make good contact in sockets which have had these "bad" simms in place. So it became a problem to have a thicker pcb and not have a thicker pcb at the same time! So I went with to solder up the pads to make the pads "thicker" but keep the PCB thinner.

As this solder is "random thickness" from pin to pin, it bends the simm socket pins more than others, which means a proper spec simm doesn't make good contact (but it does in a brand new socket!) . So in order to combat "bad simms" basically damaging the simm sockets, I soldered up my simms so the PCB physically fits in the holder, and is forced into shape by the extra solder on my simms, and thus makes good contact then!

Re: NEW 30 PIN 1MB SIMM PRODUCTION 2ND BATCH

Posted: Mon Feb 19, 2018 5:09 pm
by exxos
3RD BATCH IN THE MAKING..

IMG_2282.JPG
IMG_2282.JPG (113.58 KiB) Viewed 1187 times

Re: NEW 30 PIN 1MB SIMM PRODUCTION 2ND BATCH

Posted: Mon Feb 19, 2018 10:18 pm
by exxos
Hot stuff - literally :)

Will clean up and test tomorrow :)

simm.jpg
simm.jpg (129.94 KiB) Viewed 1174 times

Re: NEW 30 PIN 1MB SIMM PRODUCTION 2ND BATCH

Posted: Tue Mar 06, 2018 10:29 pm
by exxos
Back in stock.. for now..

https://www.exxoshost.co.uk/atari/last/storenew/#0024

Having huge problems sourcing DRAM, so invested a lot of cash in a reel of 1,000 . Should be good for around 120 STE sets then.. might take a while to build them all up :shock:

Re: NEW 30 PIN 1MB SIMM PRODUCTION 2ND BATCH

Posted: Wed Mar 07, 2018 7:28 am
by Maeke
baby kitty became a beautifull lady cat.

Re: NEW 30 PIN 1MB SIMM PRODUCTION 2ND BATCH

Posted: Fri Jun 08, 2018 10:09 pm
by exxos
I built up a new batch today of around 100 simms. I need to clean them up and test, so likely try and make a start on that on Monday :)

Re: NEW 30 PIN 1MB SIMM PRODUCTION 2ND BATCH

Posted: Thu Jun 14, 2018 11:03 am
by exxos
Starting to appear in stock now!

https://www.exxoshost.co.uk/atari/last/storenew/#0024


Will be cleaning and testing more throughout today!