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MrDomocle 0c054b56ec Re-add t9pad		2024-10-21 12:00:26 +07:00
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README.md	Re-add t9pad	2024-10-21 12:00:26 +07:00

README.md

Bill of Materials

1x PCB
1x Seeed Studio XIAO RP2040
4x M3 16mm bolt (same as in orpheuspad)
4x M3 bolt threaded heat insert (same as in orpheuspad)
1x SSD1306 128x64 0.96in 4-pin OLED display
9x Cherry MX switches (same as in orpheuspad)
9x DSA caps

How to use

Like old phone keyboards! Layout:


`[_]` `[.]` `[,]` `[?]` `["]` `[:]` `[;]`	`[a]` `[b]` `[c]`	`[d]` `[e]` `[f]`
`[g]` `[h]` `[i]`	`[j]` `[k]` `[l]`	`[m]` `[n]` `[o]`
`[p]` `[q]` `[r]` `[s]`	`[t]` `[u]` `[v]`	`[w]` `[x]` `[y]` `[z]`

Just keep pressing the same key until the letter you want appears There's no way to type numbers as of now, but I will try my best to implement a second layout once I get the thing shipped to me. The OLED is blank for now, but I want it to display the word you are typing in the future.

About

This is a keyboard that works like the ones on old keypad phones - keys 2-9 have 3 or 4 letters on each of them, and you input each letter by pressing the number repeatedly until your desired letter shows up. I only found out about matrix wiring by the time I was almost done with CAD (oops), so I could only add 9 switches by direct wiring. As I'm missing a few keys compared to the old phone keypads, I'm mapping space to the 1 key. I have plans to implement a predictive text mode that guesses which words you want to type from you only pressing each key once. This is what the OLED is for - that's where the algorithm's guesses for which word you are trying to type will be displayed. However, this is quite complicated and I don't have time to implement it at this moment, so the firmware only has the multitap mode in it as of now.