Uploads by Mahjongg
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This special page shows all uploaded files.
| Date | Name | Thumbnail | Size | Description | Versions |
|---|---|---|---|---|---|
| 15:30, 10 July 2022 | ZX81+38 rev 1.8component placement.png (file) |  |
81 KB | 1 | |
| 20:40, 2 May 2023 | ZX81+38 rev 1.9 component placement.png (file) |  |
59 KB | Moved 15pF capacitors below crystal, and RP1 is a 10K resistor packet | 3 |
| 00:30, 22 March 2023 | ZX81+38keyboard .JPG (file) |  |
723 KB | 1 | |
| 00:23, 22 March 2023 | ZX81+38keyboard seen from top.JPG (file) |  |
713 KB | 1 | |
| 23:33, 15 October 2020 | ZX81+38rev1,5 bottom.png (file) |  |
287 KB | bottom (solder) side | 1 |
| 23:22, 15 October 2020 | ZX81+38rev1,5 top.png (file) |  |
386 KB | Top (component) side revision 1.5 16 october 2020 | 1 |
| 23:03, 20 October 2015 | ZX81PLUS34 rev 2.1.pdf (file) |  |
65 KB | REMOVED BUFFER U25? ADDED CAPACITOR C21 CHANGED MICRO USB CONNECTOR TO FCI TYPE | 2 |
| 20:17, 24 January 2015 | ZX81 CHARSET.png (file) |  |
2 KB | Original character font of ZX81 | 1 |
| 22:38, 17 January 2015 | ZX81 PCB.jpg (file) |  |
82 KB | original ZX81 PCB | 1 |
| 18:29, 29 November 2016 | ZX81plus34 kleur rev 1.0.pdf (file) | |
69 KB | 1 | |
| 15:32, 28 November 2016 | ZX81plus34 rev2.00 schema.pdf (file) | |
72 KB | Original first version ZX81+34 with no plus sign in filename. | 1 |
| 14:00, 24 November 2016 | ZX81plus35(ZX14) - Bill Of Materials corrected.ods (file) |  |
10 KB | re-upload without + in filename | 1 |
| 13:54, 24 November 2016 | ZX81plus35 REV 2.2.pdf (file) | |
68 KB | re-upload version without + in filename | 1 |
| 13:54, 24 November 2016 | ZX81plus35 REV 2.2 color.pdf (file) | |
72 KB | re-upload version without + in filename | 1 |
| 18:45, 29 November 2016 | ZX81plus35 REV 3.0 13 3 16.pdf (file) | |
75 KB | version of rev 3.0 without + in filename | 1 |
| 22:44, 1 November 2016 | ZX81plus35 REV 4.0.pdf (file) | |
68 KB | schematic ZX81+35 revision 4 filename without + character | 1 |
| 22:34, 1 November 2016 | ZX81plus35 REV 4.0 Layout.png (file) |  |
233 KB | FINISHED_LAYOUT_20_SEPTEMBER_2016_FULL Filename now without + sign | 1 |
| 23:01, 22 October 2019 | ZX81plus35 silkscreen overview rev4.png (file) |  |
108 KB | Corrected TURBO / NORMAL | 5 |
| 22:20, 8 October 2019 | ZX81plus38.pdf (file) | |
198 KB | 3 | |
| 15:19, 14 September 2020 | ZX81plus38Rev1,4BW.png (file) | Error creating thumbnail: File with dimensions greater than 12.5 MP |
691 KB | final schematic ZX81+38 (revision 1.4) in black and white | 1 |
| 15:14, 10 July 2022 | ZX81plus38Rev1,8.pdf (file) | |
314 KB | changed all logic to HC, add clock inverter using unused half of U18 | 1 |
| 15:25, 10 July 2022 | ZX81plus38Rev1,8.png (file) |  |
457 KB | 2 | |
| 23:39, 11 September 2020 | ZX81plus38Rev1.4BW.pdf (file) | |
238 KB | Final schematic of ZX-81+38 rev 1.4 in black and white | 1 |
| 23:45, 11 September 2020 | ZX81plus38 BOM.ods (file) | |
18 KB | The Bill Of materials plus order codes for either Farnell, or Mouser | 1 |
| 10:40, 11 March 2020 | ZX81plus38 PCB rev 1,4 bottom view.PNG (file) |  |
325 KB | 1 | |
| 10:37, 11 March 2020 | ZX81plus38 PCB rev 1,4 top view.PNG (file) |  |
406 KB | 1 | |
| 19:35, 22 June 2022 | ZX81plus38 Rev 1,7-1.png (file) | Error creating thumbnail: File with dimensions greater than 12.5 MP |
812 KB | rev 1.7 as PNG picture | 1 |
| 20:26, 22 June 2022 | ZX81plus38 Rev 1,7-resized.png (file) |  |
761 KB | 1 | |
| 19:27, 22 June 2022 | ZX81plus38 Rev 1,7.pdf (file) | |
319 KB | schematic revision 1.7 with various updates, see bottom right block of schematic | 1 |
| 10:16, 4 March 2020 | ZX81plus38 copper bottom.PNG (file) |  |
242 KB | PCB layout bottom without solder mask | 1 |
| 10:15, 4 March 2020 | ZX81plus38 copper top.PNG (file) |  |
144 KB | Copper top without solder mask | 1 |
| 22:38, 15 October 2019 | ZX81plus38 rev1.2.pdf (file) | |
237 KB | Added Xtal frequency | 2 |
| 12:27, 16 October 2019 | ZX81plus38 rev1.2 cropped.png (file) |  |
1.18 MB | finalized | 1 |
| 23:44, 19 October 2019 | ZX81plus38 rev1.3.pdf (file) | |
240 KB | Also added A13 to EEPROM | 2 |
| 15:08, 11 November 2019 | ZX81plus38 rev1.3 picture.png (file) |  |
706 KB | Picture version | 1 |
| 13:09, 9 October 2019 | ZX81plus38 rev 1.0 further cropped.png (file) |  |
411 KB | Cropped to 2339 by 1655 pixels, while still readable | 1 |
| 23:45, 12 October 2019 | ZX81plus38 rev 1.1.pdf (file) | |
208 KB | 1 | |
| 13:57, 15 September 2022 | ZX81plus38 revision 1.9 schematic.png (file) |  |
104 KB | compressed by reducing to 150dpi and using monochrome png. | 2 |
| 22:39, 10 December 2019 | ZX81plus38 routing progress 10 december 2019.png (file) |  |
130 KB | Added card edge fingers, among more stuff this time enabled the rats nest | 1 |
| 22:49, 3 December 2019 | ZX81plus38 routing progress 3 December 2019.png (file) |  |
95 KB | 1 | |
| 22:41, 3 December 2019 | ZX81plus38 routing progress 3 december 2019.png (file) |  |
95 KB | 1 | |
| 16:59, 9 October 2020 | ZX81plus38rev1,5.pdf (file) | |
250 KB | corrected schematic | 1 |
| 17:15, 9 October 2020 | ZX81plus38rev1,5.png (file) |  |
286 KB | cropped half size | 2 |
| 12:46, 20 October 2020 | ZX81plus38rev1,6.pdf (file) | |
250 KB | Keyboard pullups changed to 10K from 4K7 | 2 |
| 14:00, 15 September 2022 | ZX81plus38rev1,9.pdf (file) | |
321 KB | corrected C7, C8 and R59 | 2 |
| 13:42, 15 September 2022 | ZX81plus38rev1,9.png (file) | Error creating thumbnail: File with dimensions greater than 12.5 MP |
491 KB | corrected cassette I/O component values of C7, C8 and R59 | 3 |
| 00:17, 13 November 2019 | ZX81plus38rev 1.4.pdf (file) | |
239 KB | revision 1.4 after component placing optimization. | 1 |
| 17:10, 19 November 2019 | ZX81plus38rev 1.4.png (file) |  |
577 KB | after optimizing placement | 2 |
| 17:12, 19 November 2019 | ZX81plus38rev 1.4 16 colour.png (file) |  |
577 KB | after optimizing placement 16 color PNG | 1 |
| 20:16, 23 August 2022 | ZXkeyboard on top of ZX-81.JPG (file) |  |
2.52 MB | 1 |
