Implemented the schematic-only V1 revision: replaced the TLP291-4 with four TLP171A(TP,F) PhotoMOS relays, replaced SW1 with a true SPST ON/OFF switch, preserved the V2 archive, and updated the review docs.
Updated files:
Open items:
- No PCB placement/routing was started.
- J1 pin-1 marker and “ST-4 - STRAIGHT 1:1 6P6C ONLY” silkscreen note remain layout-stage tasks.
- Board outline, connector access, battery-holder position, and mounting method still need definition before placement.
Suggested next steps:
- Review/approve the corrected PhotoMOS schematic and BOM.
- Confirm SW1 = DS04-254-2-01BK-SMT is acceptable as the physical power switch.
- Confirm whether J2 should stay as a 1x03 UPDI header or change to test pads before layout.