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Created a project doc

Functional Verification Report

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Functional Verification Report
Review date: 2026-09-01
Scope: Read-only review of the current schematic and PCB. No fixes were applied.
Evidence policy: PASS means confirmed from live project data and, where required, immutable datasheet evidence. FAIL means live project data demonstrates a functional or manufacturing defect. UNVERIFIED means the required external evidence or physical mapping was unavailable. Datasheet indexing returned “immutable evidence not ready” for the TPIC6B595 and SN74AHCT125 queries, so claims requiring datasheet clauses are not promoted to PASS.
Executive result
Overall: FAIL. The schematic signal topology is coherent, but the board has active PCB errors and the 12 V-to-5 V linear-regulator architecture has a severe thermal ri...
Completed the read-only functional review in Functional Verification Report.
Overall: FAIL. Primary blockers are J1/J3/DS1 placement and copper conflicts, LM1117 thermal dissipation, unsafe/unverified USB–12 V power interaction, and the unverified 40101B-5 pinout. No design changes were applied.
tell me what this board is supposed to do and how you accomplished it, new document in the files
Created a project doc

Purpose and Implementation

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Purpose and Implementation What This Board Is Supposed to Do
The Days Since Counter is a large, network-capable two-digit counter intended to show the number of days since a selected event. Typical uses include “days since the last incident,” “days since a milestone,” or any other value that can be represented from 00 to 99.
The Raspberry Pi Pico 2 W provides the intelligence and wireless connectivity. Firmware determines the value to display—either by calculating elapsed days from a stored date or by receiving an updated value over Wi-Fi—and converts the two decimal digits into seven-segment patterns.
The board is designed as a self-contained sign:
  • A 12 V DC input powers the board.
  • Two large common-anode seven-segment modules provide the visible digits.
Created Purpose and Implementation. It explains the board’s intended “days since” function, power architecture, Pico firmware role, logic buffering, serial display drivers, LED current paths, expansion bus, and physical PCB implementation.

Days Since Counter