HugoCraft wrote:I took a dive and ordered enough components to make 10 "Extra slim SDRAM Board v1.1" boards except I need 10 of these but they are out of stock:
2x20 (40 Pos.) Female Header, Double Row, Right Angle,
https://www.aliexpress.com/item/20Pcs-P ... 16130.html
Sorry if its been asked but is there another vendor I can order 10 of those from delivered to the USA? I'm looking on ebay and amazon but didn't know if anyone had a link to a known good version that would work.
diggie wrote:A tip that usually these small SMD caps don't have polarity and can be soldered either way, same with clock crystal, would be nice.
diggie wrote: I strained to check my IC was in right orientation since it was unmarked and I wasn't familiar with the text orientation rule.
diggie wrote:* State on DIY page that cores only require stability at 130MHz, but that as a guide 150MHz should generally be achievable with the recommended parts, while errors at 160+MHz does not indicate a problem. I know this information can be determined by reading around, but to have all in one place can give confidence/guidance quickly to first-time builders like me.
diggie wrote:At least, keep these things in mind when the page is next updated. Since boards are in short supply tips to help self-assemblers who might not be experts are useful.
robfish wrote:I just saw a image of a sdram board with much bigger caps then what was listed on the BOM.
JimDrew wrote:One thing that I have seen with the Winbond chips is that they are very sensitive to capacitance created by solder flux residue between pins - much more sensitive than the Alliance brand. Use a LOT of solder flux remover and a fine bristled toothbrush (or similar brush) to remove any debris between pins.
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