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13 February 2017, 18:14
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#301 |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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The Rev2 boards are here
 Sent from my iPhone using Tapatalk |
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13 February 2017, 19:06
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#302 |
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Registered User
Join Date: Feb 2013
Location: Argentina
Posts: 281
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Thank you for your effort!
The board looks very nice !!! Good job. |
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14 February 2017, 19:25
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#303 |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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 Hmmmm ... an experiment Sent from my iPhone using Tapatalk |
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14 February 2017, 21:59
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#304 |
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Registered User
Join Date: Jun 2015
Location: UK
Posts: 472
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Interesting...
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14 February 2017, 23:34
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#305 |
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Registered User
Join Date: Sep 2007
Location: Stockholm
Posts: 4,344
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Finally! After PCI busboards, what we now need is an MCA busboard.
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15 February 2017, 03:50
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#306 |
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Fanatically Amiga.
Join Date: Apr 2002
Location: Melbourne, Victoria, Australia
Age: 54
Posts: 1,557
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I know people have their own method of soldering, and with their own choice of Soldering iron.
When i did my Minimig, I had someone do the QFP208 (FPGA) for me and even then someone who supposedly knew what he was doing he fucked up and stuck all the legs of the FPGA together and couldnt fix it. I did the ram myself, as well as the 68000 on the board using the big no no of soldering to use the non temperature cheap crap $20 soldering iron (I can hear the gasps now), pre tin all the pads of the chip, place the chip visually, and then do the one corner, other corner (to hold it in place), then do a left right action of the iron tip (instead of up and down the length of the pin row) with PLENTY of flux. This only worked because Dennis (designer of Minimig) used longer pads for the flat pack chips, but from the looks of this, the pads are only JUST bigger than the profile of the chips legs because of the size of the boards, so a REAL fine chisel tip can only get to them. |
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15 February 2017, 10:20
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#307 |
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ex. demoscener "Bigmama"
Join Date: Jun 2012
Location: Fyn / Denmark
Posts: 1,634
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How do you find the quality of those dirty pcb's? I suppose it's hard to assess in general due to the fact that they pool at several different fabs?
Looking at the photo above, it seems like some of the silk screen is missing; also when watching part 2 of your soldering video yesterday, I thought it looked like some pads were tinned and some not? |
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15 February 2017, 14:45
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#308 | |
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Registered User
Join Date: Sep 2013
Location: Beeston, Nottinghamshire, UK
Posts: 238
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Quote:
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15 February 2017, 17:49
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#309 | |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Quote:
Perfectly fine. The silkscreen is sometimes shit but who cares. Sent from my iPhone using Tapatalk |
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15 February 2017, 17:52
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#310 | |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Quote:
The pads have 5mil either side. That's plenty Sent from my iPhone using Tapatalk |
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19 February 2017, 01:53
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#311 |
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Registered User
Join Date: Dec 2016
Location: Australia
Posts: 113
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So, if you added the 68000 re-locating to your board, the cost goes up too much?
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19 February 2017, 16:15
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#312 |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Yes. And it's cheaper to make them as dedicated shunts like kipper did.
Sent from my iPhone using Tapatalk |
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19 February 2017, 18:52
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#313 |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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 I'll publish this when I'm done. I really don't want to get distracted by this sort of thing Sent from my iPhone using Tapatalk |
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19 February 2017, 20:11
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#314 |
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Amiga Lover
Join Date: Jan 2010
Location: Stockholm / Sweden
Age: 46
Posts: 612
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A pleasure to follow your progress.. Keep it up!!!
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19 February 2017, 22:46
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#315 |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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I am encountering unknown stability issues with the TF530 Rev 2. I'm very perplexed. I'd hold off getting boards until i understand whats happening.
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20 February 2017, 21:38
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#316 |
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Registered User
Join Date: Jan 2017
Location: Eastbourne
Posts: 88
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I am sorry to hear that! I hope you get it sussed soon chin up! Great vids as always!
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20 February 2017, 21:42
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#317 |
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Registered User
Join Date: Jan 2017
Location: Eastbourne
Posts: 88
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Hope it's nothing funny with a voltage regulator.
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21 February 2017, 13:48
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#318 |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Seems to exhibit the issue when powered by a completely clean source (6632B)
Sent from my iPhone using Tapatalk |
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21 February 2017, 15:45
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#319 |
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Registered User
Join Date: Jan 2017
Location: Eastbourne
Posts: 88
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Hi I've not seen the under side of the board or looked on git hub so please forgive me with this! With the ram do you have bypass cap's on the ram side.
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21 February 2017, 17:56
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#320 |
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Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Of course. 10uF per chip. 2 x 10uF on the 030
Sent from my iPhone using Tapatalk |
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