| ??? 05/22/05 00:49 Read: times |
#93698 - 24-pin parts Responding to: ???'s previous message |
Well ... it's no secret that the '751 once existed, but it's not clear where one would snag a reprogrammable part now. Since the space available is barely larger than the existing 24-pin device, I doubt some form of adapter would fit. This whole thing would be much easier if one could simply buy a keypad, but what's offerred these days is not of adequate quality, or appearance of it, to warrant the effort.
Time was, when one could actually buy a "real" keypad with "real" keys as one finds on a keyboard, rather than the fragile, "toy" types offered by such vendors as Grayhill. I don't know what's happened to Cherry, Mircroswitch, and others, who used to build such things. Once the encoding problems is solved, the matter of key tops is still to be managed. It looks like I'll have to buy a keyboard for its switches, and build a useable keypad. RE |
| Topic | Author | Date |
| 24-pin parts? | 01/01/70 00:00 | |
| i tend to recall | 01/01/70 00:00 | |
| datasheet of S87C751 | 01/01/70 00:00 | |
| EPROM, not OTP | 01/01/70 00:00 | |
| EPROM *AND* OTP | 01/01/70 00:00 | |
| DIL headers | 01/01/70 00:00 | |
| Yes. Like This.... | 01/01/70 00:00 | |
| 24-pin parts | 01/01/70 00:00 | |
| What kind of package??? | 01/01/70 00:00 | |
| The look of it.... | 01/01/70 00:00 | |
| 24-pin package | 01/01/70 00:00 | |
| Maybe there are other options.... | 01/01/70 00:00 | |
24-pin (skinny dip) 805x | 01/01/70 00:00 | |
| try google | 01/01/70 00:00 | |
| Ebay | 01/01/70 00:00 | |
| or buy new | 01/01/70 00:00 |