bitfieldlabs
commented
2 years ago Thanks for the feedback. I will need to make adjustments to the BOM later.
R67 is a zero Ohm resistor. It can be populated as a wire bridge. It is only needed when feeding the +18V from the columns and can be left unpopulated when supplying +18V via J3.
J137 and J138 are connected to the same lines. The same is true for the J133, J134 and J135 connectors. The labels are used a bit inconsistently in the schematic and silkscreen. On the silkscreen I wanted to make clear where to connect to easiest.
Somehow my Kicad footprint for the Schottky diodes doesn't have a proper silkscreen layer. I need to fix that.
Be also aware that I've had several reports of damaged v1.4 boards when people forgot to connect the ground line. It's a design flaw of this +18V from columns design. Personally I prefer the v1.3 board as I also don't mind connecting both +18V and GND to the PPD.
First off - Excellent project! I've been reading through everything I can here and on pinball forums. I've ordered a batch of these to assemble and found a couple issues, and a question after exporting the BOM via KiCAD (for use with Partsbox).
-R67 is listed as "18v COL". I see note in wiki about the 18V columns, but would this be a jumper or resistor in the R67 position? If it's a resistor, what's the value? -J1 is listed in BOM as J137_IN_C, but silkscreen is J138_IN_C -J2 is listed in BOM as J133_IN_R, but silkscreen is J135_IN_R -D1, D10, D11, D12, D13, D14, D15, D16, and D17 is not on the silkscreen
Thank you!