From 04a52b1eeaae239abf6802427818ebdaa8f36099 Mon Sep 17 00:00:00 2001 From: William Rickert Date: Tue, 1 Sep 2026 10:35:24 -0500 Subject: [PATCH] Add PrtSc to the numpad, filling the nav block Between Del and PgDn, which makes the nav block a solid 3x2 and leaves the arrows isolated by a symmetric pair of gaps rather than three asymmetric ones. 26 keys. PrtSc earns a key because it is the screenshot key on every Linux desktop; Insert, ScrLk and Pause stay on a layer. Co-Authored-By: Claude Opus 5 --- Documents/bom.csv | 4 ++-- Documents/numpad-layout.svg | 7 ++++--- README.md | 17 ++++++++++------- 3 files changed, 16 insertions(+), 12 deletions(-) diff --git a/Documents/bom.csv b/Documents/bom.csv index d249895..88ae005 100644 --- a/Documents/bom.csv +++ b/Documents/bom.csv @@ -23,7 +23,7 @@ HALF-L/R,Split,D-ESD,1,ESD 5V bidirectional,PESD5V0S1BA,C2827694,SOD-323,Extende HALF-L/R,Split,J3,1,3-pin header DNF,JST SH,-,-,Consigned,0.02,"*** DNF INSURANCE *** VCC/GND/DATA fallback if SBU proves flaky (bad cables). 3 pads cost nothing" HALF-L/R,Split,-,-,SBU1+SBU2 TIE,-,-,-,-,0.00,"Tie A8 and B8 together on the board. SBU is CROSSED in the cable, so this makes it orientation-proof and doubles the conductor" NUMPAD,DNF,J1/U3/R3/R4/R5,0,DO NOT POPULATE,-,-,-,-,0.00,"*** From the ALL block: numpad MCU has NO connector of its own. Its D+/D- route internally to hub downstream port 1. No connector = no ESD part and no CC resistors needed. Saves ~$0.19" -NUMPAD,Matrix,D1-D25,25,1N4148W,1N4148W,C81598,SOD-123,Basic,0.011,"25 keys: 14 numpad + 9 nav + 2 thumb (Enter 2u, +). No Num key" +NUMPAD,Matrix,D1-D26,26,1N4148W,1N4148W,C81598,SOD-123,Basic,0.011,"26 keys: 14 numpad + 10 nav (incl. PrtSc) + 2 thumb (Enter 2u, +). No Num key" NUMPAD,Hub,U4,1,USB2.0 4-port hub,CH334R,C4154405,QSOP-16-150mil,Extended,0.50,"Ports: 1=own MCU (internal FS) 2=left half 3=right half 4=spare" NUMPAD,Hub,Y2,1,12MHz crystal,X322512MSB4SI,C9002,SMD3225-4P,Basic,0.101,"CH334 has built-in load caps - verify internal value vs this 20pF CL crystal; fit DNF cap pads" NUMPAD,Hub,C12-C14,3,100nF 0402,CL05B104KO5NNNC,C1525,0402,Basic,0.006,"hub decoupling" @@ -37,6 +37,6 @@ NUMPAD,SBU,-,-,SBU PASS-THROUGH,-,-,-,-,0.00,"*** Passive trace *** Tie SBU1+SBU NUMPAD,SBU,D-ESD2,2,ESD 5V bidirectional,PESD5V0S1BA,C2827694,SOD-323,Extended,0.036,"One per half-port SBU net" HALF-L,Switches,SW-,34,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"BOTTOM SIDE. Alt: C49352235" HALF-R,Switches,SW-,41,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"BOTTOM SIDE. Alt: C49352235" -NUMPAD,Switches,SW-,25,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"One per key. BOTTOM SIDE" +NUMPAD,Switches,SW-,26,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"One per key. BOTTOM SIDE" NOTE,Assembly,-,-,SINGLE-SIDED,-,-,-,-,-,"Put ALL SMD on the BOTTOM: sockets, MCU, passives, diodes, and any reverse-mount SK6812MINI-E. Top face bare except switch holes. Keeps JLC to one assembly pass" NOTE,Mechanical,-,-,PLATE REQUIRED,-,-,-,-,-,"Hotswap needs a switch plate or socket pads tear off during switch insertion. FR4 plate = just another JLC board" diff --git a/Documents/numpad-layout.svg b/Documents/numpad-layout.svg index 50dfc9b..1e70539 100644 --- a/Documents/numpad-layout.svg +++ b/Documents/numpad-layout.svg @@ -16,11 +16,12 @@ Numpad — no encoder, nav shifted up The volume encoder is gone. Home, End, Page Up, Page Down and Delete all move up one row, leaving a gap above the up arrow that separates the nav block from the arrow cluster. Numpad — settled layout -25 keys, six columns by five rows. Nav block up top, isolated inverted-T, Enter and + on the thumb. +26 keys. The nav block is now a solid 3×2, with the arrows isolated by a symmetric pair of gaps. Home End PgUp Del +PrtSc PgDn ↑ ← @@ -43,10 +44,10 @@ Enter + -Nav · 9 +Nav · 10 Numpad · 14 Thumb · 2 -About 114 by 105 mm. The thumb pair spans exactly the three nav columns; three cells empty around the arrows. +About 114 by 105 mm. Only two cells empty now, sitting symmetrically either side of the up arrow. \ No newline at end of file diff --git a/README.md b/README.md index 6ded410..82bc35a 100644 --- a/README.md +++ b/README.md @@ -41,16 +41,19 @@ either. |---|---|---|---| | `Schematics/Left` | 1 | **34** | MCU, matrix, USB-C, SBU split link | | `Schematics/Right` | 1 | **41** | MCU, matrix, USB-C, SBU split link | -| `Schematics/Numpad` | 1 | **25** (14 numpad + 9 nav + 2 thumb) | MCU, matrix, **CH334R hub**, 3 downstream ports | +| `Schematics/Numpad` | 1 | **26** (14 numpad + 10 nav + 2 thumb) | MCU, matrix, **CH334R hub**, 3 downstream ports | **Numpad layout is settled** — see `Documents/numpad-layout.svg`, and `Documents/three-board-overview.svg` for all three at the same scale. Six -columns by five rows, ~114 × 105 mm, **25 keys and no encoder**. +columns by five rows, ~114 × 105 mm, **26 keys and no encoder**. -- **Nav block across the top**: Home/End/PgUp over Del/PgDn, with the arrows in - a standard **inverted-T** isolated below by three empty cells — the same - breathing room a 104 gives them. Del sits two rows above `←` with a gap - between, so the destructive key is never adjacent to the one you hit blind. +- **Nav block across the top**: a solid 3×2 — Home/End/PgUp over Del/PrtSc/PgDn + — with the arrows in a standard **inverted-T** isolated below by a symmetric + pair of empty cells, the same breathing room a 104 gives them. Del sits two + rows above `←` with a gap between, so the destructive key is never adjacent to + the one you hit blind. +- **PrtSc has a real key.** It's the screenshot key on every Linux desktop, so + it earns one. Insert, ScrLk and Pause do not, and stay on a layer. - **Numpad on the right**: digits in a 3×3 with `0` as a 2u, and `/ * −` in a right-hand column beside 9/6/3, where a full-size numpad puts its operators. - **`Enter` (2u) and `+` on a stepped thumb cluster**, spanning exactly the @@ -61,7 +64,7 @@ columns by five rows, ~114 × 105 mm, **25 keys and no encoder**. - **No encoder.** Dropped along with the scroll wheel; volume lives on a layer or on the halves' function row. This makes the numpad a completely plain QMK keyboard — no encoder, no pointing device, just a matrix. It is the simplest - of the three boards by a distance, and ~$4.11 in parts. + of the three boards by a distance, and ~$4.16 in parts. Cabling: