da-h/BackOnTrack-SplitKb3Custom Split-Keyboard with 44 keys, 2 trackpads, 2 trackpad-buttons, per-key LED, underglow LED
Backontrack44 is an open-source printed circuit board by da-h, from the da-h/BackOnTrack-SplitKb repository on GitHub. It is a 2-layer board of 151.1 × 95 mm with 100 parts on 79 nets, routed with 1,969 tracks and 152 vias.
It is built around the 1N4148W and SK6812MINI-E. Its parts include 22 switches, 22 inductors, 2 connectors and 1 IC. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Steps: Manufacture, Install, Flash, Assemble
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| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 1N4148W | Footprints:Diode_SOD123 | D-T1, D-T2, D1-1, D1-2, D1-3, D1-4, D1-5, D1-6, D2-1, D2-2, D2-3, D2-4, D2-5, D2-6, D3-1, D3-2 +8 |
| 21 | choc_SW_HS | Footprints:SW_choc_HS_1u_reversible_rotated | SW1-1, SW1-2, SW1-3, SW1-4, SW1-5, SW1-6, SW2-1, SW2-2, SW2-3, SW2-4, SW2-5, SW2-6, SW3-1, SW3-2, SW3-3, SW3-4 +5 |
| 12 | choc_SK6812MINI-E | Footprints:LED_choc_6028R_doublesided_rotated | L11, L12, L13, L14, L15, L16, L31, L32, L33, L34, L35, L36 |
| 10 | choc_SK6812MINI-E | Footprints:LED_choc_6028R_doublesided_rotated_twice | L21, L22, L23, L24, L25, L26, L41, L42, L43, L44 |
| 8 | Jumper_2_Open | Footprints:Jumper | JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8 |
| 6 | SK6812MINI | Footprints:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | LB1, LB2, LB3, LB4, LB5, LB6 |
| 5 | MountingHole | Footprints:MountingHole_2.5mm_Pad | H5, H6, H7, H8, H9 |
| 4 | MountingHole | Footprints:MountingHole_2.2mm_M2_ISO14580_Pad | H1, H2, H3, H4 |
| 2 | choc_SW_HS | Footprints:SW_PUSH_6mm_H5mm | SW-T1, SW-T2 |
| 1 | AudioJack4 | Footprints:TRRS_JACK_MJ4PP9_Renamed | J1 |
| 1 | Logo | Footprints:Logo | esc |
| 1 | MX_SW_solder | Footprints:TACT_SWITCH_TVBP06 | RS1 |
| 1 | OLED | Footprints:OLED_4Pin | J2 |
| 1 | ProMicro | Footprints:ProMicro_rev2 | U1 |
| 1 | choc_SW_HS | Footprints:SW_choc_HS_1.5u_reversible_rotated | SW4-1 |
| 1 | production label | Footprints:production label | JLCJLCJLCJLC |
| 1 | trackpad | Footprints:trackpad_35mm | T1 |
It measures 151.1 × 95 mm and has 2 copper layers, 1.6 mm thick.
100 parts, built around the 1N4148W and SK6812MINI-E. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the da-h/BackOnTrack-SplitKb repository on GitHub, at the commit this page was made from: the board is kicad/backontrack44.kicad_pcb and its schematic kicad/backontrack44.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask da-h before reusing the design.
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