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open-ephys / acquisition-board

Hardware interface for streaming up to 512 channels of neural data via USB
https://open-ephys.github.io/acq-board-docs/
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Updated BOM #16

Open jsiegle opened 3 years ago

jsiegle commented 3 years ago

Someone building the board pointed out that a number of components in the Bill of Materials are no longer available from DigiKey. They helped find direct substitutes, which are now listed in the Google Sheet BOM: https://docs.google.com/spreadsheets/d/1ywzGieWArYGw0-nE7zoQLTEWNAr0ZzdUiqCSY4VL7uM/edit#gid=0

Can someone look these over and make sure they look OK? I checked for identical packages and similar specs, but it's always helpful to have another pair of eyes. There are 9 components in total (with a YES in the "UPDATED" column).

Also, there are currently two parallel BOMs, one as a Google Sheet (linked in BOM.txt) and one as an Excel file in the repository. Can we deprecate the Excel file?

lpl1977 commented 3 years ago

Hello, that would be me!

I've been looking through the BOM. In the Google Sheet BOM I noticed that Item 33, LS_I2C originally TCA9406DCUR, has been replaced with SN74AVC2T45DCUR. I checked the pinouts for these two parts and they appear to be different. It doesn't appear to me that the schematics were updated so I don't think this will work as a replacement. I was able to get the original TCA series part from Newark.