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Ryan Schmidt 2022-06-17 06:52:11 -05:00 committed by GitHub
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docs/1.0b-to-1.0c.adoc
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@ -3,25 +3,25 @@
## Introduction ## Introduction
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. 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 received a fully-assembled BlueSCSI after April 1st, 2021 then this was done for you. If you have a kit labeled 1.0-b you can make these modifications to become a 1.0-c.
## Steps ## Steps
### Disconnect `TERMPOWER` from 220 Pull Up Jupmer ### Disconnect `TERMPOWER` from 220 Pull Up Jumper
Use a cutting tool to cut the small trace between the `TERMPOWR` and 220 Pull Up Jumper pictured below. Use a cutting tool to cut the small trace between the `TERMPOWR` and 220 Pull Up Jumper pictured below.
Make sure continiutiy from `TERMPOWER` to the diode still flows correctly but is disconnected from the jumper. Make sure continuity from `TERMPOWER` to the diode still flows correctly but is disconnected from the jumper.
image::images/1.0-b-bodge-1.jpg[] image::images/1.0-b-bodge-1.jpg[]
### Connect 5V to 220 Pull Up Jupmer ### Connect 5V to 220 Pull Up Jumper
Now we will provide pull up from the 5v provided by the BluePill. Now we will provide pull up from the 5V provided by the BluePill.
image::images/1.0-b-bodge-2.png[] image::images/1.0-b-bodge-2.png[]
### Complete! ### Complete!
Thats it! 5v to the Pull Up resistors will now work when powered externally. That’s it! 5V to the Pull Up resistors will now work when powered externally.