2 layers213.5 × 98.3 mm
2 layers131.5 × 184.4 mm
Fissure
crides/fissure66A 46/36/40 key split keyboard
- Size
- 131.5 × 184.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 239
- Nets
- 283
- Pads
- 1,330
- Tracks, vias
- 3,322, 589
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 8 Sep 2019
- Updated
- 30 Oct 2023
Overview
Fissure is an open-source printed circuit board by crides, from the crides/fissure repository on GitHub, published under the MIT licence. It is a 2-layer board of 131.5 × 184.4 mm with 239 parts on 283 nets, routed with 3,322 tracks and 589 vias.
It is built around the W25Q128JVSIQ, TLV62568DBV and BQ24075RGT, with the DW01A, FS8205 and SRV05-4 among its other parts. Its parts include 52 diodes, 44 switches, 36 resistors, 17 capacitors and 16 ICs. It belongs with the keyboards and input boards of this library.
Main components
7
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
TLV62568DBV
SOT-23-5-40℃~+125℃@(TJ) 1 1.5MHz 1A 2.5V~5.5V 35uA 600mV~5.5V Adjustable Buck Buck Built-in Yes SOT-23-5 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BQ24075RGT
QFN-16-EP(3x3)-40℃~+125℃ 1.5A 4.2V 4.35V~6.4V 6.5uA Charging IC Lithium Battery Not supported Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery Management
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery ManagementFS8205
SOT-23-6-55℃~+150℃ 1.2V 1W 2 N-Channel 20V 37mΩ@2.5V 6A N-Channel SOT-23-6 MOSFETs ROHSFORTUNEMOSFETsSRV05-4
SOT-23-6L-55℃~+150℃ 15V 1pF 4A 5V 5uA 6V 80W ESD Four channels IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
README.mdFissure
My Choc-only split keyboard for desktop use with constant experiments. See below for current keymap
You can find firmware, PCB design and gerber files for past versions if you want to build your own (I'm not used to version controlling PCB files, so if you have problems with them, please let me know). The firmware of this keyboard is based on QMK firmware. The PCB files are in pcb/, and firmwares in qmk/.
For a list of all of the past versions, see here. Fun fact: only the first version has 46 keys, which came down to 36 after two weeks of using when I desoldered the top number row.
For a list of past keymaps, you'll have to do it manually as Keyboard Layout Editor doesn't support viewing versions of a keymap. Since the saved keymap is hosted on gist, you can check out all the past versions of the gist, copy the contents of each file back into KLE to view the past keymaps.
Picture of latest version (v3.2)
Latest Keymap
(generated using https://github.com/caksoylar/keymap-drawer with tweaked colors, source is in keymap.yaml. Note the existence of the lower outer pinky keys is a limitation of the graphic generator. equivalent version on KLE)
Parts
239| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | LED_BGRA | LED_SMD:LED_ASMB-KTF0-0A306 | LED1, LED2, LED10, LED11, LED12, LED13, LED14, LED15, LED16, LED17, LED18, LED19, LED20, LED21, LED22, LED23 +24 |
| 13 | 100k | Resistor_SMD:R_0603_1608Metric | R3, R5, R8, R10, R11, R12, R18, R19, R20, R21, R24, R25, R26 |
| 12 | diode-choc | pg1350:pg1350-S | K3, K8, K13, K18, K19, K20, K23, K28, K33, K38, K39, K40 |
| 10 | 1SS309 | Package_TO_SOT_SMD:SOT-23-5 | D3, D4, D5, D6, D7, D8, D9, D10, D11, D12 |
| 10 | diode-choc | pg1350:pg1350-SN | K1, K6, K11, K16, K17, K25, K30, K35, K36, K37 |
| 9 | diode-choc | pg1350:pg1350-SR | K4, K9, K14, K21, K24, K26, K29, K31, K34 |
| 9 | diode-choc | pg1350:pg1350-SL | K2, K5, K7, K10, K12, K15, K22, K27, K32 |
| 8 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C13, C14, C15 |
| 8 | 5.1k | Resistor_SMD:R_0603_1608Metric | R7, R9, R13, R14, R29, R30, R35, R36 |
| 7 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R4, R15, R16, R22, R23 |
| 6 | soldered-nuts:M2 | H1, H2, H3, H4, H5, H6 | |
| 6 | 1k | Resistor_SMD:R_0603_1608Metric | R6, R17, R27, R28, R33, R34 |
| 4 | Conn_01x12_Pin | fissure:bridge-conn | J3, J4, J12, J16 |
| 4 | Conn_01x12_Socket | fissure:bridge | J6, J7, J11, J17 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C6, C7, C8 |
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C16, C17 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R31, R32 |
| 2 | 10nF | Capacitor_SMD:C_0603_1608Metric | C9, C11 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C10, C12 |
| 2 | 10uH | Inductor_SMD:L_0603_1608Metric | L1, L3 |
| 2 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | BQ24075 | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mm_ThermalVias | U3, U9 |
| 2 | Battery_Cell | Connector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | BT1, BT2 |
| 2 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U11, U14 |
| 2 | FS8205 | Package_TO_SOT_SMD:SOT-23-6 | U15, U16 |
| 2 | IS31FL3729 | Package_DFN_QFN:QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm_ThermalVias | U6, U13 |
| 2 | RED | LED_SMD:LED_0805_2012Metric | D1, D2 |
| 2 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U7, U8 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_B3U-1000P | SW1, SW2 |
| 2 | SW_SPDT | Button_Switch_SMD:SW_SPDT_PCM12 | SW3, SW4 |
| 2 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J2, J8 |
| 2 | W25Q128JVS | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U2, U10 |
| 2 | debug-port | misc:debug-port-single-side | J1, J9 |
| 2 | e73-2gm08s1c | mcu:e73-2g4m08s1c-shrunk | U1, U12 |
| 1 | 2.2uH | Inductor_SMD:L_1008_2520Metric | L2 |
| 1 | 3V3 | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP7 |
| 1 | CS | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP1 |
| 1 | GND | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP8 |
| 1 | LOGO | LOGO | G*** |
| 1 | MISO | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP3 |
| 1 | MOSI | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP4 |
| 1 | PMW3610 | sensor:PMW3610 | U5 |
| 1 | SCL | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP6 |
| 1 | SCLK | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP2 |
| 1 | SDA | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP5 |
| 1 | TLV62568DBV | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | cirque-trackpad | Connector_FFC-FPC:Hirose_FH12-12S-0.5SH_1x12-1MP_P0.50mm_Horizontal | J5 |
| 1 | github | fissure:github | QR***** |
The 201 most common of 239 parts.
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Questions
How big is the Fissure PCB?
It measures 131.5 × 184.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Fissure use?
239 parts, built around the W25Q128JVSIQ, TLV62568DBV, BQ24075RGT and DW01A. 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.
Where can I download the Fissure KiCad files?
From the crides/fissure repository on GitHub, at the commit this page was made from: the board is pcb/fissure/fissure.kicad_pcb and its schematic pcb/fissure/fissure.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Fissure design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).