2 layers100 × 77.5 mm
2 layers100 × 77.5 mm
DiskII
btb/DiskII71An Apple Disk II controller clone using standard EPROMs
- Size
- 100 × 77.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 102
- Pads
- 293
- Tracks, vias
- 555, 9
- Pours
- 259
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 3 Aug 2022
- Updated
- 2 Aug 2023
Overview
DiskII is an open-source printed circuit board by btb, from the btb/DiskII repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 100 × 77.5 mm with 35 parts on 102 nets, routed with 555 tracks and 9 vias.
It is built around the 74LS05P-E, 74LS132P-E and 74LS174DC, with the 74LS323PC and NE556 among its other parts. Its parts include 7 capacitors, 7 resistors, 3 transistors and 3 connectors.
Main components
574LS05P-E
-- Inverters ROHSRenesas ElectronicsLogic Gates
74LS132P-E
DIP-14-20℃~+75℃ 2 2.7V 22ns@5V,15pF 4 4.75V~5.25V 400uA 500mV 74LS 8mA NAND Gate Schmitt trigger DIP-14 Logic Gates ROHSRenesas ElectronicsLogic Gates
74LS174DC
-0ns 0℃~+70℃ 1 16mA 20ns 30MHz 30ns@5V,15pF 4.75V~5.25V 400uA 6 74LS Series 8mA Asynchronous Push-Pull Reset Rising Edge - Flip Flops ROHSonsemiFlip Flops
74LS323PC
DIP-200℃~+70℃ 29ns@5V,15pF 35MHz 4.75V~5.25V 8 Output enable、Asynchronous parallel load function、Supports forward and reverse shift Tri-State DIP-20 Shift RegistersTexas InstrumentsShift Registers
NE556
SOP-140℃~+70℃ 2 200mA 4.5V~16V 5mA SOP-14 555 Timers / Counters ROHSGRTimers / Counters
README
README.mdDiskII
An Apple Disk II controller clone using standard EPROMs
Revision 0 of this board is broken, here's how to fix it.
Revision 1 has all known problems fixed.
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | .1uF | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C1, C3, C4, C5, C6, C7 |
| 2 | 3K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R7 |
| 2 | A10 | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels | JP5A10, JP6A10 |
| 2 | A9 | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels | JP5A9, JP6A9 |
| 2 | MPSU51 | Package_TO_SOT_THT:TO-220-3_Vertical | Q2, Q3 |
| 2 | Unidisk | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP17, JP19 |
| 1 | 150 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 22uF | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C2 |
| 1 | 2758/16/32 P5 | Package_DIP:DIP-24_W15.24mm | UD3 |
| 1 | 2758/16/32 P6 | Package_DIP:DIP-24_W15.24mm | UB3 |
| 1 | 2N3906 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1 |
| 1 | 47K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 560 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 68 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 74LS05 | Package_DIP:DIP-14_W7.62mm | UB2 |
| 1 | 74LS132 | Package_DIP:DIP-14_W7.62mm | UA2 |
| 1 | 74LS174 | Package_DIP:DIP-16_W7.62mm | UA3 |
| 1 | 74LS259/9334 | Package_DIP:DIP-16_W7.62mm | UC2 |
| 1 | 74LS323 | Package_DIP:DIP-20_W7.62mm | UC3 |
| 1 | A8 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | SWA8 |
| 1 | Apple II Expansion Slot | Apple2:Apple II Expansion Edge Connector | J1 |
| 1 | DRIVE 1 | Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Horizontal | J3 |
| 1 | DRIVE 2 | Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Horizontal | J2 |
| 1 | NE556 | Package_DIP:DIP-14_W7.62mm | UD2 |
Questions
How big is the DiskII PCB?
It measures 100 × 77.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DiskII use?
35 parts, built around the 74LS05P-E, 74LS132P-E, 74LS174DC and 74LS323PC. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the DiskII KiCad files?
From the btb/DiskII repository on GitHub, at the commit this page was made from: the board is DiskII.kicad_pcb and its schematic DiskII.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DiskII design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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