ClassicII
About the ClassicII PCB
ClassicII is an open source PCB design by btb, published on GitHub. It is a board, with 21 components from 10 distinct parts.
Other key parts include the AM26LV32, AM26LS30, AM85C80 and LM79L05AC. By type, the board carries 7 capacitors, 6 ICs, 3 inductors, 2 connectors and 1 resistor.
From the project
Reproduction of Macintosh Classic II
This was reverse-engineered from a later-revision Classic II logic board. All components on the front side, and a handful of components on the back side, were removed, and the board was scanned.
Since my scanner isn't very accurate, scale-wise, the scans were resized and aligned to match the board's measurements.
The board was severely damaged by battery and capacitor leakage, but I was able to faithfully reproduce all connections.
Main components on the ClassicII
ClassicII bill of materials (BOM)
21 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | AM26LV32 | SOIC-16_4.55x10.3mm_P1.27mm_oval | U3, U5 |
| 2 | AM26LS30 | PLCC-20_rounded | U6, U7 |
| 1 | AM85C80 | PLCC-68_24.2x24.2mm_P1.27mm_oval | U8 |
| 1 | LM79L05AC | SOIC-8_3.9x4.9mm_P1.27mm_oval | U15 |
| 1 | MODEM | TE_5749268-1_MINI_DIN_8_RA_Shield | J2 |
| 1 | PRINTER | TE_5749268-1_MINI_DIN_8_RA_Shield | J3 |
| 2 | 25R 150pF | SOIC-20W_7.5x12.8mm_P1.27mm_RC | RC1, RC2 |
| 3 | Ferrite | L_2010_5025Metric_Pad2.0x2.2mm_HandSolder | L1, L8, L9 |
| 7 | 100nF | SMD_0603_1608Metric_Pad1.52x1.02mm | C28, C38, C51, C58, C59, C60, C81 |
| 1 | 4.7K | SMD_0805_2012Metric_Pad1.25x1.65mm | R13 |
ClassicII design files
The KiCad project lives in the btb/ClassicII repository on GitHub; these links point at the commit this page was built from.
- SchematicClassicIIRevB/serial.kicad_sch
ClassicII: common questions
How many components are on the ClassicII?
21 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the ClassicII design files?
From the btb/ClassicII repository on GitHub, which has the schematic; the links under Design files point to each one.
Can I use the ClassicII design in my own project?
The repository has no license, so all rights stay with btb. Use it as a reference, and ask the author before reusing the design.