Iisi riser board
About the Iisi riser board
Iisi riser board is an open source PCB design by dougg3, published on GitHub. It is a 2-layer board measuring 30.5 × 36 mm, with 47 components from 34 distinct parts.
Other key parts include the M51977FP and M51944BML. By type, the board carries 22 resistors, 11 capacitors, 6 diodes, 4 transistors, 2 ICs and 1 connector.
It belongs with the power & battery designs in this gallery.
From the project
Replica of Macintosh IIsi power supply riser board model AP41S
This is a replica of the daughterboard found in the Apple/Sony Macintosh IIsi APS-06 power supply. The part number printed on the original board is AP41S. This PCB often suffers from severe corrosion damage due to electrolytic capacitor leakage, so this project aims to provide you with a way to replace it with a brand new PCB.
To aid with reverse engineering, all of the components were removed from the board and inspected out of circuit. I used pictures of the bare board (top, bottom) to draw a replica design. The Bomarc schematics were a huge help with part identification and understanding…
Main components on the Iisi riser board
Iisi riser board bill of materials (BOM)
47 components, 34 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | M51977FP | SO-20_5.3x12.6mm_P1.27mm | U1 |
| 1 | M51944BML | SOT-89-3 | U2 |
| 1 | DTA114E | SOT-346-Rohm | Q1 |
| 1 | DTC124X | SOT-346-Rohm | Q2 |
| 2 | 2SC2412K | SOT-346-Rohm | Q3, Q4 |
| 1 | Conn_01x10_Pin | EdgeConnector10 | J1 |
| 1 | 2.2k | Potentiometer_Bourns_TC33X_Vertical | RV1 |
| 1 | 18V | SC-59-Diode | D1 |
| 1 | 13V | SC-59-Diode | D2 |
| 1 | 5.1V | SC-59-Diode | D3 |
| 2 | BAS16 | SC-59-Diode | D4, D5 |
| 1 | SB05-05C-TB-E | SC-59-Diode | D6 |
| 1 | 330pF | C_0805_2012Metric | C1 |
| 3 | 0.01uF | C_0805_2012Metric | C2, C3, C6 |
| 1 | 0.22uF | C_1206_3216Metric | C4 |
| 1 | 470pF | C_0805_2012Metric | C5 |
| 1 | 3300pF | C_0805_2012Metric | C7 |
| 1 | 1000pF | C_0805_2012Metric | C8 |
| 1 | 33uF | CP_Elec | C9 |
| 1 | 100uF | CP_Elec | C10 |
Show 14 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ? | C_0805_2012Metric | C11 |
| 2 | 22k | R_0805_2012Metric | R1, R2 |
| 5 | 10k | R_0805_2012Metric | R3, R6, R13, R15, R17 |
| 2 | 4.7k | R_0805_2012Metric | R4, R16 |
| 1 | 100 | R_0805_2012Metric | R5 |
| 1 | 1k | R_0805_2012Metric | R7 |
| 1 | 100k | R_0805_2012Metric | R8 |
| 1 | 8.2 | R_0805_2012Metric | R9 |
| 1 | 220 | R_0805_2012Metric | R10 |
| 1 | 6.8k | R_0805_2012Metric | R11 |
| 1 | 150k | R_0805_2012Metric | R12 |
| 1 | 33k | R_0805_2012Metric | R14 |
| 1 | 47k | R_0805_2012Metric | R18 |
| 4 | 0 | R_0805_2012Metric | R19, R20, R21, R22 |
Iisi riser board design files
The KiCad project lives in the dougg3/iisi-riser-board repository on GitHub; these links point at the commit this page was built from.
- Layoutiisi-riser-board.kicad_pcb
- Schematiciisi-riser-board.kicad_sch
Iisi riser board: common questions
How big is the Iisi riser board?
The Iisi riser board measures 30.5 × 36 mm, has 2 copper layers and is 1 mm thick.
How many components are on the Iisi riser board?
47 components, from 34 distinct parts. The full bill of materials is listed on this page.
Where can I download the Iisi riser board design files?
From the dougg3/iisi-riser-board repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Iisi riser board design in my own project?
The repository has no license, so all rights stay with dougg3. Use it as a reference, and ask the author before reusing the design.
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