Bolle's SE/30 Board Recreation - Pick and Place / BOM Discrepency

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grumpyengineer89

grumpyengineer89

New Tinkerer
Jan 3, 2025
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erik.build
Hi Folks,

I'm trying to spin a batch of boards through JLCPCB for the SE/30 since the unit I just got was battery bombed.

I noticed a few discrepancies between the pick and place BOM and the google sheets BOM and I was wondering which was correct... @Bolle

R12/R13 are listed as 180 ohm in the pick and place BOM on GitHub, but the Google Sheet BOM shows them as 100 ohm.

R16/R17/R18/R19/R23/R25/R26/R29/R30 are listed as 22 ohm in the pick and place BOM on GitHub, but the Google Sheet BOM shows them as 27 ohm.

Thank you for your advice!
 
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Bolle

Bolle

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Nov 1, 2021
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Exact value doesn't matter on those.
If I remember right the JLCPCB BOM lists whatever part was in stock (and a basic part whenever possible) at the time the file was made.
It might be a good idea look at JLCs stock and compare if there's another option right now (as in cheaper, in stock, different value...)
 
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SmokeUpJohnny

New Tinkerer
Dec 28, 2024
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grumpyengineer89 said:
Hi Folks,

I'm trying to spin a batch of boards through JLCPCB for the SE/30 since the unit I just got was battery bombed.

I noticed a few discrepancies between the pick and place BOM and the google sheets BOM and I was wondering which was correct... @Bolle

R12/R13 are listed as 180 ohm in the pick and place BOM on GitHub, but the Google Sheet BOM shows them as 100 ohm.

R16/R17/R18/R19/R23/R25/R26/R29/R30 are listed as 22 ohm in the pick and place BOM on GitHub, but the Google Sheet BOM shows them as 27 ohm.

Thank you for your advice!
Click to expand...

Hey. If you're looking for any other grumpy engineers to buy in on your batch, I'd be interested.
 
grumpyengineer89

grumpyengineer89

New Tinkerer
Jan 3, 2025
6
8
3
Connecticut, USA
erik.build
SmokeUpJohnny said:
Hey. If you're looking for any other grumpy engineers to buy in on your batch, I'd be interested.
Click to expand...
Absolutely, I'd be happy to if you are interested. I'm out of the office today, but I can grab some photos of the boards tomorrow when I'm back at my bench. I had ordered them from JLCPCB in black -- I think they look quite cool, but no worries if it's not your preferred color. Definitely shoot me a DM if you are interested.

I'll also post in the trading post this week -- I ordered 5, and will ultimately offer my 4 spares at my cost + shipping (though I may hold back 1 spare until my own build is done and tested).

Specs of my JLCPCB order (with rear pick and place) attached. I paid $227.92 for 5, so they came out to $45.58 each.
 

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JDW

JDW

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Just wanted to update this thread with exact info from @Bolle about the Rev. 5 board changes:

Macintosh SE/30 logicboard recreation (thread revival)

the CPU walking the bus is a really good sign -- a lot of things have to be going right for that to happen. UK6 is the video ROM, right? pins 2-10, 21, and 23-25 are just the address lines (i.e., inputs) so i wouldn't expect swapping the chip to affect anything there. i'm assuming that you're...
68kmla.org 68kmla.org

"The pads on the two large PLCCs are longer now… especially on the 68882..."
 
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