search

joethezombie / Amiga-1000-Rejuvenator

A1000 Rejuvenator
Other
46 stars 14 forks source link

bom and schematic don't match #8

Open ogg1e opened 2 years ago

ogg1e commented 2 years ago

BOM has 47uF for C32, schematic says 22uf.

BOM also doesn't state what caps are polarity and which aren't. Schematic states they all have polarity, but is that true?

joethezombie commented 2 years ago

Sorry for the late reply... I wasn't getting notifications of opened issues. The BOM always supersedes schematic placeholders. As far as capacitor polarity, all electrolytic capacitors on the board are polarized. Ceramic decoupling capacitors are not.

ogg1e commented 2 years ago

Sorry, but I mean the schematic file in kicad, not the silkscreen. The board I have shows R1 = 33 ohm on the silkscreen, but when you open up the sch in kicad, it's 47 ohm.

R1 is not listed in the BOM at all. What do I use for R1 in this situation?

Acill commented 2 years ago

I have a 33 in mine.

On Sat, May 21, 2022 at 12:42 PM Gary Ogden @.***> wrote:

Sorry, but I mean the schematic file in kicad, not the silkscreen. The board I have shows R1 = 33 ohm on the silkscreen, but when you open up the sch in kicad, it's 47 ohm.

R1 is not listed in the BOM at all. What do I use for R1 in this situation?

— Reply to this email directly, view it on GitHub https://github.com/joethezombie/Amiga-1000-Rejuvenator/issues/8#issuecomment-1133758135, or unsubscribe https://github.com/notifications/unsubscribe-auth/AEKHD2355MRVORU2VZMNNDDVLE4CDANCNFSM5LEF6URQ . You are receiving this because you are subscribed to this thread.Message ID: @.***>

joethezombie commented 2 years ago

R1 is interesting because the original bare Rejuvenator board is marked 33Ω. But original populated boards have been found with 33Ω, 47Ω, or 68Ω resistors. Consensus was it probably doesn't matter much. It's there to protect Agnus from the flying lead connection, which isn't optimal. Work is being done on the next revision of the board to eliminate the flying leads.