2 layers
Encoder
byrantech/laptop
anyon_e, a highly integrated, high end, open source laptop. Attempt the impossible.
7 parts4.3kMIT
2 layers45.7 × 50.8 mm
QL 4 floppy addon
alvaroalea/QL_4_floppy_addon1A add-on Board to connect 4 disc drivers to a Miracle Disc interface on Sinclair QL Computer
- Size
- 45.7 × 50.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 58
- Pads
- 123
- Tracks, vias
- 180, 0
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 16 Jan 2024
- Updated
- 22 Nov 2024
Overview
QL 4 floppy addon is an open-source printed circuit board by alvaroalea, from the alvaroalea/QL_4_floppy_addon repository on GitHub. It is a 2-layer board of 45.7 × 50.8 mm with 7 parts on 58 nets, routed with 180 tracks and 0 vias.
Its parts include 4 connectors, 1 capacitor, 1 IC and 1 diode. It belongs with the interfaces and adapters boards of this library.
README
README.md4 DISC DRIVE ADAPTER FOR MIRACLE DISC INTERFACE.
(C) 2023 Alvaro Alea Fernandez
License under: CERN Open Hardware Licence Version 2 - Strongly Reciprocal
https://ohwr.org/cern_ohl_s_v2.txt
This board has been reverse engineered from pictures.
THIS BOARD HAS NOT BEEN TESTED!! Use at your own risk.
Information
This adapter is intended to connect 4 disc drives to one interface disc on the Sinclair QL Computer.
You need 2 pair of disc drives, with plain cables, on each par one drive shall be configured as DS0 and the another as DS1
The drives conected to the middle conector will be FLP1 and FLP2, and the drives conected to the outher conector will be FLP3 and FLP4
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P10.16mm_Horizontal | D1 |
| 1 | 74LS138 | Package_DIP:DIP-16_W7.62mm | U1 |
| 1 | C | Capacitor_THT:C_Disc_D7.5mm_W5.0mm_P10.00mm | C1 |
| 1 | Conn_01x01 | Connector_Wire:SolderWire-0.127sqmm_1x01_D0.48mm_OD1mm | J4 |
| 1 | Conn_02x17_Odd_Even | 8bits:DIL_Cable_Female__2x17_P2.54mm_Horizontal_PCB_edge | J1 |
| 1 | Conn_02x17_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x17_P2.54mm_Vertical | J2 |
| 1 | Conn_02x17_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x17_P2.54mm_Horizontal | J3 |
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Questions
How big is the QL 4 floppy addon PCB?
It measures 45.7 × 50.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the QL 4 floppy addon use?
7 parts. 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 QL 4 floppy addon KiCad files?
From the alvaroalea/QL_4_floppy_addon repository on GitHub, at the commit this page was made from: the board is QL_4_floppy_addon.kicad_pcb and its schematic QL_4_floppy_addon.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the QL 4 floppy addon design in my own project?
Its repository states no licence, so its author keeps all rights: ask alvaroalea before reusing the design.