User contributions for Mahjongg
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31 August 2022
- 00:4600:46, 31 August 2022 diff hist +66 ZX81plus38 simple to build ZX-81 clone →Tuesday August 31, 2022 keyboard works!
- 00:4200:42, 31 August 2022 diff hist 0 N File:Cabling.JPG No edit summary current
- 00:0000:00, 31 August 2022 diff hist +7 ZX81plus38 simple to build ZX-81 clone →Tuesday August 31, 2022 keyboard works!
- 00:0000:00, 31 August 2022 diff hist +23 ZX81plus38 simple to build ZX-81 clone →Tuesday August 31, 2022 keyboard works!
30 August 2022
- 23:5823:58, 30 August 2022 diff hist +471 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 23:4523:45, 30 August 2022 diff hist 0 N File:Success!.JPG No edit summary current
- 16:3116:31, 30 August 2022 diff hist +48 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 16:3016:30, 30 August 2022 diff hist −48 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 16:2416:24, 30 August 2022 diff hist 0 File:ZX81+38 keyboard PCB preview.png Mahjongg uploaded a new version of File:ZX81+38 keyboard PCB preview.png
- 16:0716:07, 30 August 2022 diff hist +39 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 16:0616:06, 30 August 2022 diff hist −39 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 16:0416:04, 30 August 2022 diff hist 0 File:ZX-81Keyboard color.png Mahjongg uploaded a new version of File:ZX-81Keyboard color.png
- 15:5715:57, 30 August 2022 diff hist 0 File:ZX-81Keyboard color.pdf Mahjongg uploaded a new version of File:ZX-81Keyboard color.pdf
- 00:4500:45, 30 August 2022 diff hist +253 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 00:4200:42, 30 August 2022 diff hist +547 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 00:2300:23, 30 August 2022 diff hist +7 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 00:2300:23, 30 August 2022 diff hist +74 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 00:2100:21, 30 August 2022 diff hist +130 N File:ZX81+38 keyboard PCB preview.png Keyboard PCB for ZX81+38 Single sided PCB with only copper on top side. PCB will fit in the rectangular indentation
28 August 2022
- 18:4718:47, 28 August 2022 diff hist −1 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 18:4718:47, 28 August 2022 diff hist 0 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 18:4618:46, 28 August 2022 diff hist +41 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 18:4518:45, 28 August 2022 diff hist 0 N File:ZX-81Keyboard color.png No edit summary
- 18:4118:41, 28 August 2022 diff hist +2 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 18:4118:41, 28 August 2022 diff hist +32 ZX81plus38 simple to build ZX-81 clone →Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
- 18:4018:40, 28 August 2022 diff hist +26 N File:ZX-81Keyboard color.pdf revision 1.0
- 18:3818:38, 28 August 2022 diff hist +105 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Modify prototype keyboard to fit on top of ZX-81
23 August 2022
- 23:4923:49, 23 August 2022 diff hist +187 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Modify prototype keyboard to fit on top of ZX-81
- 23:4623:46, 23 August 2022 diff hist +264 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Modify prototype keyboard to fit on top of ZX-81
- 23:4223:42, 23 August 2022 diff hist 0 N File:Keyboard with rainbow coloured cablels.JPG No edit summary current
- 21:4221:42, 23 August 2022 diff hist +86 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Modify prototype keyboard to fit on top of ZX-81
- 21:4021:40, 23 August 2022 diff hist 0 N File:The back of the in height reduced keyboard PCB with matrix wiring.JPG No edit summary current
- 21:3621:36, 23 August 2022 diff hist +165 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Modify prototype keyboard to fit on top of ZX-81
- 21:2621:26, 23 August 2022 diff hist +128 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Modify prototype keyboard to fit on top of ZX-81
- 21:2421:24, 23 August 2022 diff hist 0 N File:Cut one row more is needed.JPG No edit summary current
- 20:2220:22, 23 August 2022 diff hist 0 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Modify prototype keyboard to fit on top of ZX-81
- 20:2120:21, 23 August 2022 diff hist −56 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Modify prototype keyboard to fit on top of ZX-81
- 20:2020:20, 23 August 2022 diff hist +177 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Repaired joystick logic in revision 1.9
- 20:1620:16, 23 August 2022 diff hist 0 N File:ZXkeyboard on top of ZX-81.JPG No edit summary current
- 20:1120:11, 23 August 2022 diff hist +383 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Repaired joystick logic in revision 1.9
- 15:4015:40, 23 August 2022 diff hist +68 ZX81plus38 simple to build ZX-81 clone →August 22, 2022 Tests reveal joystick logic not working
- 15:3415:34, 23 August 2022 diff hist +84 ZX81plus38 simple to build ZX-81 clone →August 23, 2022 Repaired joystick logic in revision 1.9
- 15:3215:32, 23 August 2022 diff hist −5 ZX81plus38 simple to build ZX-81 clone No edit summary
- 15:3115:31, 23 August 2022 diff hist +5 ZX81plus38 simple to build ZX-81 clone No edit summary
- 15:3015:30, 23 August 2022 diff hist +31 N File:PCB Preview ZX81+38 rev 1,9 top.png Lates PCB preview current
- 14:4314:43, 23 August 2022 diff hist +476 ZX81plus38 simple to build ZX-81 clone →May 3, 2022 After more than two year of covid related delay I finally re-started building my own copy
- 14:3314:33, 23 August 2022 diff hist +166 ZX81plus38 simple to build ZX-81 clone →August 22, 2022 Tests reveal joystick logic not working
- 14:3014:30, 23 August 2022 diff hist +48 N File:ZX81+38 rev 1.9 component placement.png added RN3 resistor network 5 x 10K
- 13:5413:54, 23 August 2022 diff hist +38 ZX81plus38 simple to build ZX-81 clone →August 22, 2022 Tests reveal joystick logic not working
- 13:5113:51, 23 August 2022 diff hist 0 File:ZX81plus38rev1,9.png Mahjongg uploaded a new version of File:ZX81plus38rev1,9.png
- 13:4413:44, 23 August 2022 diff hist +100 N File:ZX81plus38rev1,9.png picture version (.PNG medium quality) of revision 1.9 with improved joystick circuitry
- 13:3113:31, 23 August 2022 diff hist +80 ZX81plus38 simple to build ZX-81 clone →August 22, 2022 Tests reveal joystick logic not working
- 13:3013:30, 23 August 2022 diff hist +115 N File:ZX81plus38rev1,9.pdf revision 1.9 has revised joystick circuitry, with R23 = 1K and 10K pulldowns on bases of transistors.
22 August 2022
- 16:0316:03, 22 August 2022 diff hist −103 ZX81plus38 simple to build ZX-81 clone →August 22, 2022 Tests reveal joystick logic not working
- 15:5915:59, 22 August 2022 diff hist +70 ZX81plus38 simple to build ZX-81 clone →August 22, 2022 Tests reveal joystick logic not working
- 15:5115:51, 22 August 2022 diff hist +1,686 ZX81plus38 simple to build ZX-81 clone →August 10, 2022 its working, but have yet to connect the keyboard
9 August 2022
- 23:5323:53, 9 August 2022 diff hist +289 ZX81plus38 simple to build ZX-81 clone →August 10, 2022 its working, but have yet to connect the keyboard
- 23:4123:41, 9 August 2022 diff hist +629 ZX81plus38 simple to build ZX-81 clone →August 3, 2022 bad luck, I'm missing one HC IC
2 August 2022
- 22:5722:57, 2 August 2022 diff hist −1 m ZX81plus38 simple to build ZX-81 clone →August 3, 2022 bad luck, I'm missing one HC IC
- 22:5622:56, 2 August 2022 diff hist +79 ZX81plus38 simple to build ZX-81 clone →August 3, 2022 bad luck, Iḿ missing one IC
- 22:5222:52, 2 August 2022 diff hist +426 ZX81plus38 simple to build ZX-81 clone →August 3, 2022 bad luck, Iḿ missing one IC
- 22:4222:42, 2 August 2022 diff hist +859 ZX81plus38 simple to build ZX-81 clone →July 26, 2022 Updated all revision 1.8 files on GitHub
26 July 2022
- 18:1318:13, 26 July 2022 diff hist +123 ZX81plus38 simple to build ZX-81 clone →July 26, 2022 Updated all revision 1.8 files on GitHub
- 14:0014:00, 26 July 2022 diff hist +143 ZX81plus38 simple to build ZX-81 clone →July 26, 2022 Updated all revision 1.8 files on GitHub
- 13:5613:56, 26 July 2022 diff hist +358 ZX81plus38 simple to build ZX-81 clone →July 23 2022 JP1 has become unchangeable in rev 1.7
24 July 2022
- 20:2020:20, 24 July 2022 diff hist +3,593 User:Mahjongg No edit summary current
23 July 2022
- 20:1420:14, 23 July 2022 diff hist +412 ZX81plus38 simple to build ZX-81 clone →July 19, That wasn't it
21 July 2022
- 14:3714:37, 21 July 2022 diff hist +20 m ZX81plus38 simple to build ZX-81 clone →July 10, 2022 updated rev 1.7 schematic, Gerber/drill and placement drawing
- 14:3614:36, 21 July 2022 diff hist +1,019 ZX81plus38 simple to build ZX-81 clone →July 15, I have an idea why the first test didn't work
15 July 2022
- 12:4712:47, 15 July 2022 diff hist +4 m ZX81plus38 simple to build ZX-81 clone →July 15, I have an idea why the first test didn't work
- 12:4712:47, 15 July 2022 diff hist +2 m ZX81plus38 simple to build ZX-81 clone →July 15, Have an idea why the first test didn't work
- 12:4612:46, 15 July 2022 diff hist +543 ZX81plus38 simple to build ZX-81 clone →July 14, 2022 Updated the layout with correction of NPTH holes and USB connector positions
14 July 2022
- 00:0700:07, 14 July 2022 diff hist +15 m ZX81plus38 simple to build ZX-81 clone →July 14, 2022 Updated the layout with correction of NPTH holes and USB connector positions
- 00:0600:06, 14 July 2022 diff hist +2,294 ZX81plus38 simple to build ZX-81 clone →July 10, 2022 updated rev 1.7 schematic, Gerber/drill and placement drawing
10 July 2022
- 15:3215:32, 10 July 2022 diff hist +74 ZX81plus38 simple to build ZX-81 clone →July 10, 2022 updated rev 1.7 schematic, Gerber/drill and placement drawing
- 15:3015:30, 10 July 2022 diff hist 0 N File:ZX81+38 rev 1.8component placement.png No edit summary current
- 15:2715:27, 10 July 2022 diff hist +53 ZX81plus38 simple to build ZX-81 clone →July 10, 2022 updated rev 1.7 schematic, Gerber/drill and placement drawing
- 15:2515:25, 10 July 2022 diff hist 0 File:ZX81plus38Rev1,8.png Mahjongg uploaded a new version of File:ZX81plus38Rev1,8.png current
- 15:1915:19, 10 July 2022 diff hist 0 N File:ZX81plus38Rev1,8.png No edit summary
- 15:1815:18, 10 July 2022 diff hist +150 ZX81plus38 simple to build ZX-81 clone →July 6, 2022 I made an observation while building up my copy of the ZX81+38 that shook me
- 15:1415:14, 10 July 2022 diff hist +82 N File:ZX81plus38Rev1,8.pdf changed all logic to HC, add clock inverter using unused half of U18 current
6 July 2022
- 18:3418:34, 6 July 2022 diff hist +36 m ZX81plus38 simple to build ZX-81 clone →July 6, 2022 I made an observation while building up my copy of the ZX81+38 that shook me
- 17:4217:42, 6 July 2022 diff hist +103 ZX81plus38 simple to build ZX-81 clone →July 6, 2022 I made an observation while building up my copy of the ZX81+38 that shook me
- 17:2717:27, 6 July 2022 diff hist +3,466 ZX81plus38 simple to build ZX-81 clone →June 29, 2022 The crystal oscillator is working!
29 June 2022
- 00:4800:48, 29 June 2022 diff hist 0 ZX81plus38 simple to build ZX-81 clone →June 29, 2022 The crystal oscillator is working!
28 June 2022
- 23:2923:29, 28 June 2022 diff hist +174 ZX81plus38 simple to build ZX-81 clone →June 29, 2022 The crystal oscillator is working!
- 23:2723:27, 28 June 2022 diff hist +14 ZX81plus38 simple to build ZX-81 clone →The crystal oscillator is working!
- 23:2623:26, 28 June 2022 diff hist +63 ZX81plus38 simple to build ZX-81 clone →The crystal oscillator is working!
- 23:0923:09, 28 June 2022 diff hist 0 ZX81plus38 simple to build ZX-81 clone →The crystal oscillator is working!
- 23:0823:08, 28 June 2022 diff hist +47 N File:P1030120.JPG Better picture plus using PCBites current
- 22:5922:59, 28 June 2022 diff hist 0 File:P1030119.JPG Mahjongg uploaded a new version of File:P1030119.JPG current
- 22:5822:58, 28 June 2022 diff hist −48 ZX81plus38 simple to build ZX-81 clone →The crystal oscillator is working!
- 22:5722:57, 28 June 2022 diff hist +66 N File:P1030119.JPG A picture showing measuring the 13MHz crystal signal
- 22:5422:54, 28 June 2022 diff hist +7 ZX81plus38 simple to build ZX-81 clone →The crystal oscillator is working!
- 22:5222:52, 28 June 2022 diff hist −2 ZX81plus38 simple to build ZX-81 clone →The crystal oscillator is working!
- 22:5222:52, 28 June 2022 diff hist +108 ZX81plus38 simple to build ZX-81 clone →It happened I uploaded all ZX81+38 revision 1.7 files to GitHub
23 June 2022
- 17:0617:06, 23 June 2022 diff hist +638 ZX81plus38 simple to build ZX-81 clone →juni 22 2022, got a free Xtal and 74HCU04, Finished Revision 1.7
22 June 2022
- 21:3521:35, 22 June 2022 diff hist 0 m ZX81plus38 simple to build ZX-81 clone →juni 22 2022, got a free Xtal and 74HCU04, Finished Revision 1.7
- 21:3021:30, 22 June 2022 diff hist +78 ZX81plus38 simple to build ZX-81 clone →juni 22 2022, got a free Xtal and 74HCU04, Finished Revision 1.7
- 21:2921:29, 22 June 2022 diff hist +74 N File:ZX81+38 rev 1.7 component placement.png Updated version with U21 = 74HC04 ,rotated J3 and R21 = 330R current
- 20:2720:27, 22 June 2022 diff hist +41 ZX81plus38 simple to build ZX-81 clone →juni 22 2022, got a free Xtal and 74HCU04, Finished Revision 1.7