IPod 5th Generation - Video

821-0828 A1278 Battery Indicator Light Flex

Overview

This is an open-source, KiCad-based 821-0828 PCBA that has been reverse-engineered from a physical board. This is the flex assembly used for indicating battery level on the side of the A1278 13" MacBook Pro. The LTC3219 LED driver is configured over I2C/SMBUS. The flex also hosts an omnidirectional magnetic (Hall effect) switch (AH1802) that is used for sensing the clamshell state.

Disclaimer

The information contained in this repository has been generated via reverse-engineering of publicly available material, and is provided without warranty or guarantee of accuracy. The Electron Vault is not responsible for any losses or damages caused to equipment as a consequence of the information contained in this repository or associated documents.

Setup

Database Library

This project uses a local database library for all components. As the library is linked to the project through relative pathing, it should just work once the ODBC driver is installed.

1. Install an ODBC driver. I use this one http://www.ch-werner.de/sqliteodbc/
2. [Optional] Install an SQLite database editor. I use SQLiteStudio https://sqlitestudio.pl

Theme

This KiCad project has a number of thematic customisations. These are however completely optional and everything should work fine with the default theme. If you however wish to install the theme, here is the procedure:

1. Install KiCad as normal.
2. Copy PREF/color/Black and White.json from the repo into the corresponding folder in your KiCad preferences.
3. Launch KiCad and open Preferences -> Colors.
4. The Black and White theme should now be available in Schematic Editor -> Colors and PCB Editor -> Colors.
5. Schematic font: Arial

Known Limitations

As this is a reverse-engineered design, there are several limitations potentially affecting accuracy that must be acknowledged:

• This board is not ready for production. The intent was to make it visually accurate enough to assist with troubleshooting, repair, or as a reference design to facilitate the design of drop-in replacements or other similar projects. OpenBoardView (Landrex-BRD) compatible files (generated using kicad-boardview exporter) are provided in the repo along with PDF schematics.
  • Component placement is only photographically accurate - there may be mechanical interferences.
  • Board outline is best-effort. Use at your own risk.
  • The stackup (2L PI flex with black coverlay) is in theory correct, but provided without warranty.
  • Stiffener detail (PI behind mezzanine connector and FR-4 around magnetic switch area) is not provided.
  • The routing is in theory complete but provided without warranty.
  • Trace widths are purely photographically scaled.
• Passive component (resistors, capacitors) values were measured with an LCR meter and rounded to the nearest standard value. Accuracy is not guaranteed.