MacSnap SCSI Reloaded
About the MacSnap SCSI Reloaded PCB
MacSnap SCSI Reloaded is an open source PCB design by demik, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 84 × 88 mm, with 32 components from 20 distinct parts.
Other key parts include the MB_LOW, MB_HI, ROM_LOW, ROM_HI and ATF16V8B. By type, the board carries 12 capacitors, 10 ICs, 8 resistors, 1 connector and 1 diode.
It belongs with the retro computing designs in this gallery.
From the project
SCSI interface by Dove Computer Corporation for Macintosh 512Ke
This is a simple design clone to the original, using mostly all through hole components. It's designed this way to be period correct and easy to build for people who don't like soldering SMD components. The only SMD component is the 2.85V voltage regulator for SCSI termination. Footprint is very similar. Like the original, the SCSI is provided through a LPT header.
Main components on the MacSnap SCSI Reloaded
MacSnap SCSI Reloaded bill of materials (BOM)
32 components, 20 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MB_LOW | DIP-28_W15.24mm_Piggy | U1 |
| 1 | MB_HI | DIP-28_W15.24mm_Piggy | U2 |
| 1 | ROM_LOW | DIP-28_W15.24mm_Socket | U3 |
| 1 | ROM_HI | DIP-28_W15.24mm_Socket | U4 |
| 2 | ATF16V8B | DIP-20_W7.62mm | U5, U6 |
| 1 | Z53C8003VSG | PLCC-44_THT-Socket | U7 |
| 1 | MC34268DR2G | SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | LT1117-2.85 | SOT-223-3_TabPin2 | U9 |
| 1 | DS1233D | TO-92_HandSolder | U10 |
| 1 | SCSI IDC-26 | IDC-Header_2x13_P2.54mm_Vertical | J1 |
| 1 | 1N5817 | D_DO-41_SOD81_P10.16mm_Horizontal | D2 |
| 4 | 100nF | C_Axial_L3.8mm_D2.6mm_P7.50mm_Horizontal | C1, C2, C6, C7 |
| 1 | 1500pF | C_Axial_L3.8mm_D2.6mm_P7.50mm_Horizontal | C4 |
| 5 | 10uF | CP_Radial_Tantal_D4.5mm_P2.50mm | C8, C9, C10, C11, C12 |
| 2 | 100nF | C_Axial_L3.8mm_D2.6mm_P10.00mm_Horizontal | C13, C14 |
| 2 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R3 |
| 1 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 2 | 47 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5, R6 |
| 1 | 1200 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 2 | 4610X-101-111LF | R_Array_SIP10 | RN1, RN2 |
MacSnap SCSI Reloaded design files
The KiCad project lives in the demik/MacSnap-SCSI repository on GitHub; these links point at the commit this page was built from.
MacSnap SCSI Reloaded: common questions
How big is the MacSnap SCSI Reloaded PCB?
The MacSnap SCSI Reloaded measures 84 × 88 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MacSnap SCSI Reloaded?
32 components, from 20 distinct parts. The full bill of materials is listed on this page.
Where can I download the MacSnap SCSI Reloaded design files?
From the demik/MacSnap-SCSI repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the MacSnap SCSI Reloaded design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which demik chose for the repository.
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