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Files

Matthew Nielsen 0549f643fe Move details about each version to separate files.

Move future plans to separate file.
Move BOM to separate file.
Add more detail and pictures to v1.1.

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bluescsi_pb_v1.1.jpg

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bluescsi_powerbook_v1.1.jpg

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drive_comparison.jpg

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README.md

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v1_0_and_v1_1_side_by_side.jpg

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PowerBook adapter for BlueSCSI, v1.1

April 2021

This design is the current design. It replaces v1.0.

Changes in order of importance:

Mounting hole locations adjusted so they match an actual drive
Connect RETURN on 40-pin SCSI connector with signal ground
STM32 +5 is connected to TERMPWR by default, via breakable jumper pad
Separate jumpers provided for powering via TERMPWR or MOTORPWR
- MOTORPWR is a separate +5v provided to run the drive motor and actuator
- This change will be helpful for debugging power issues where MOTORPWR appears to be inconsistent
Activity LED (LED_BUILTIN) broken-out if you want to have an external LED
Increased TERMPWR trace width
Traces and resistor packs are moved farther away from mounting holes to avoid potential shorts
Back silkscreen marks location of the key pin (17) within the 40-pin connector
Moved legends for J1, J2 and J8 so they are next to pin 1 on their respective connectors
Corners rounded more
Numerous changes to the routing of traces
Shorten board by about 5mm
- This is the shortest practical length to maintain all four screw holes

A 2.5 inch SCSI drive is 100mm x 70mm. This version of bluescsi_pb is 72mm x 67mm, or 77mm x 67mm once the 40-pin connector is attached.