Timeline for reverse engineering the Nord Lead 4 control board
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 24, 2018 at 23:11 | comment | added | D.A.S. | It always irks me that NKRO fails to be leading edge after 3K and becomes trailing edge resulting in tyopgrhaphic dislexia ...like that. | |
| Dec 24, 2018 at 22:59 | comment | added | Ali Somay | This btw is the best explanation so far. blog.komar.be/how-to-make-a-keyboard-the-matrix | |
| Jun 28, 2018 at 12:51 | comment | added | D.A.S. | Glad to share in your career | |
| Jun 27, 2018 at 18:16 | comment | added | D.A.S. | Rows and columns may be reversed. Eight lines decoded from three bits and five orthogonal lines adds up to eight bits for 40 switches max | |
| Jun 26, 2018 at 22:52 | comment | added | Ali Somay | What if i have 34 switches, then according to the key matrix technique there should be 8 columns and 5 rows, because with 8 and 4 i can only read 32 switches but to read 34 i need another row, or is there another way to achieve this? Because the fifth row will be only added for 2 switches instead of 8. | |
| Jun 26, 2018 at 22:49 | vote | accept | Ali Somay | ||
| Jun 26, 2018 at 20:57 | comment | added | D.A.S. | In 1975 we used a 1:16 decoder and latches and logic on MC6800 to read and write 96 LEDs and 96 switches and 3 digit LED display. For SCADA command centre. | |
| Jun 26, 2018 at 20:50 | comment | added | Ali Somay | wow what a beautiful explanation about key matrices. I didn’t know this technique. I will check the device acordingly | |
| Jun 26, 2018 at 20:30 | history | edited | D.A.S. | CC BY-SA 4.0 |
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| Jun 26, 2018 at 20:25 | history | edited | D.A.S. | CC BY-SA 4.0 |
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| Jun 26, 2018 at 20:21 | comment | added | crj11 | See pcbheaven.com/wikipages/How_Key_Matrices_Works | |
| Jun 26, 2018 at 20:01 | history | edited | D.A.S. | CC BY-SA 4.0 |
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| Jun 26, 2018 at 19:59 | comment | added | Ali Somay | as i guess these switches are for giving logic high or low but if you have more than one switch at the same bus? How would you know which one is pressed? I must be missing some part in the circuit there seems to be no mux or demux between the switch and bus. | |
| Jun 26, 2018 at 19:53 | history | answered | D.A.S. | CC BY-SA 4.0 |