Uploads by Mahjongg
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This special page shows all uploaded files.
| Date | Name | Thumbnail | Size | Description | Versions |
|---|---|---|---|---|---|
| 12:46, 20 October 2020 | ZX81plus38rev1,6.pdf (file) |  |
250 KB | Keyboard pullups changed to 10K from 4K7 | 2 |
| 20:20, 18 October 2020 | PCB PrevIew ZX81+38 rev 1,6 bottom.png (file) |  |
334 KB | bottom side revision 1,6 | 1 |
| 20:16, 18 October 2020 | PCB PrevIew ZX81+38 rev 1,6 top.png (file) |  |
448 KB | version with corrected A8 instead of A8' keyboard matrix | 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 |
| 17:15, 9 October 2020 | ZX81plus38rev1,5.png (file) |  |
286 KB | cropped half size | 2 |
| 16:59, 9 October 2020 | ZX81plus38rev1,5.pdf (file) | |
250 KB | corrected schematic | 1 |
| 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 |
| 23:45, 11 September 2020 | ZX81plus38 BOM.ods (file) |  |
18 KB | The Bill Of materials plus order codes for either Farnell, or Mouser | 1 |
| 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 |
| 21:55, 30 June 2020 | ZX81+35 REV 4.1 schematic.pdf (file) | |
68 KB | The lates schematic, 30 June, 2020 rev 4,1 of ZX81+35 | 1 |
| 21:45, 30 June 2020 | New Gerbers Rev 4,1 detail.png (file) |  |
126 KB | 1 | |
| 21:41, 30 June 2020 | New Gerbers Rev 4,1.png (file) |  |
192 KB | New version 4,1 with correct solder mask | 1 |
| 21:21, 30 June 2020 | Old gerbers Rev 4,0 detail.png (file) |  |
35 KB | This detail shows the problems clearly | 1 |
| 21:20, 30 June 2020 | Old Gerbers Rev 4,0.png (file) |  |
190 KB | This is a screen capture from a gerber viewer showing the file I uploaded end of 2019, there are clearly problems with it. | 1 |
| 12:45, 10 April 2020 | Final ZX81plus38 PCB rev 1,4 silk screen top.PNG (file) |  |
111 KB | Version of April 10, 2020 | 2 |
| 12:40, 10 April 2020 | Final ZX81plus38 PCB rev 1,4 bottom view.PNG (file) |  |
333 KB | scratch line JP11 to bottom side, pads of jumpers to 1.6mm instead of 1.7mm | 2 |
| 12:37, 10 April 2020 | Final ZX81plus38 PCB rev 1,4 top view.PNG (file) |  |
414 KB | Moved the last default jumper wire to the bottom, made jumper pads smaller | 2 |
| 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 | |
| 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 |
| 00:28, 4 March 2020 | ZX81+38 4 maart 2020.png (file) |  |
66 KB | Final 100% routed, with copper fill. | 1 |
| 23:15, 25 February 2020 | Ratsnest ZX81+38 26 Feb 2020.png (file) |  |
66 KB | 1 | |
| 23:36, 18 February 2020 | Finished layout ZX81+38 19 feb 2020 without copper fill.png (file) |  |
76 KB | Finshed layout, no copper fill yet. Expansion port for I/O only | 1 |
| 23:16, 11 February 2020 | Ratsnest ZX81+38 12 Feb 2020.png (file) |  |
68 KB | progression on February 12, 2020. | 1 |
| 23:03, 28 January 2020 | Ratsnest ZX81+38 28 jan 2020.png (file) |  |
74 KB | 1 | |
| 23:01, 21 January 2020 | Ratsnest ZX81plus38 22 jan 2020.png (file) |  |
76 KB | 1 | |
| 22:17, 14 January 2020 | Ratsnest ZX81 plus 38 14 jan 2020.png (file) |  |
79 KB | progress on january 14, 2020 | 1 |
| 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 | |
| 01:09, 20 November 2019 | Placement and ratnest 2019-11-20 02-05-42.png (file) |  |
77 KB | optimized placement, plus some GND and +5V routing | 1 |
| 17:12, 19 November 2019 | ZX81plus38rev 1.4 16 colour.png (file) |  |
577 KB | after optimizing placement 16 color PNG | 1 |
| 17:10, 19 November 2019 | ZX81plus38rev 1.4.png (file) |  |
577 KB | after optimizing placement | 2 |
| 00:17, 13 November 2019 | ZX81plus38rev 1.4.pdf (file) | |
239 KB | revision 1.4 after component placing optimization. | 1 |
| 15:08, 11 November 2019 | ZX81plus38 rev1.3 picture.png (file) |  |
706 KB | Picture version | 1 |
| 23:27, 5 November 2019 | Ratsnest ZX81+38.png (file) |  |
84 KB | rats-nest and modified pads before part and port optimizations to show that 2 wires in-between pas is necessary, and how the pads are re-shaped to accommodate two 0.2mm traces. | 1 |
| 10:41, 1 November 2019 | Nationaal video game museum.jpg (file) |  |
178 KB | Larger picture | 2 |
| 10:33, 1 November 2019 | Randy Fromm 400x400.png (file) |  |
245 KB | 1 | |
| 23:48, 29 October 2019 | ZX81+38 component overview proposal.png (file) |  |
8 KB | First try | 1 |
| 18:33, 29 October 2019 | Layout sound expansion rev2.1 component overview.png (file) |  |
37 KB | component overview | 1 |
| 23:01, 22 October 2019 | ZX81plus35 silkscreen overview rev4.png (file) |  |
108 KB | Corrected TURBO / NORMAL | 5 |
| 22:20, 22 October 2019 | Layout sound expansion rev2.1.PNG (file) |  |
106 KB | 1 | |
| 22:13, 22 October 2019 | Sound expansion rev 2.1-1.png (file) |  |
276 KB | Repaired 74LS02 | 1 |
| 22:07, 22 October 2019 | Sound expansion rev 2.1.pdf (file) | |
28 KB | Rev 2.1 23 Oktober 2019; definition 74LS02 repaired | 1 |
| 23:12, 20 October 2019 | Printing all 256 characters.JPG (file) |  |
921 KB | 1 | |
| 23:07, 20 October 2019 | ZX81+35 revision 4.0 with keyboard.JPG (file) |  |
917 KB | 1 | |
| 23:44, 19 October 2019 | ZX81plus38 rev1.3.pdf (file) | |
240 KB | Also added A13 to EEPROM | 2 |
| 12:27, 16 October 2019 | ZX81plus38 rev1.2 cropped.png (file) |  |
1.18 MB | finalized | 1 |
