1.0b-to-1.0c.adoc 888 B

123456789101112131415161718192021222324252627
  1. # BlueSCSI 1.0-b to 1.0-c
  2. :toc: macro
  3. ## Introduction
  4. 1.0-c was a small change to fix an issue with machines that provide low or no `TERMPOWER` over the SCSI bus. If you recived a Fully Assembled BlueSCSI after April 1st, 2021 then this was done for you. If you have a kit labled 1.0-b you can make these modifications to become a 1.0-c.
  5. ## Steps
  6. ### Disconnect `TERMPOWER` from 220 Pull Up Jupmer
  7. Use a cutting tool to cut the small trace between the `TERMPOWR` and 220 Pull Up Jumper pictured below.
  8. Make sure continiutiy from `TERMPOWER` to the diode still flows correctly but is disconnected from the jumper.
  9. image::images/1.0-b-bodge-1.jpg[]
  10. ### Connect 5V to 220 Pull Up Jupmer
  11. Now we will provide pull up from the 5v provided by the BluePill.
  12. image::images/1.0-b-bodge-2.png[]
  13. ### Complete!
  14. Thats it! 5v to the Pull Up resistors will now work when powered externally.