Key-B-hardware
About the Key-B-hardware PCB
Key-B-hardware is an open source PCB design by SaidAlvarado, published on GitHub under the MIT license. It is a 4-layer board measuring 146 × 98.8 mm, with 63 components from 28 distinct parts.
Other key parts include the SRV05-4, BQ24075RGTR and BT840. By type, the board carries 31 switches, 12 resistors, 6 capacitors, 3 ICs, 3 connectors and 2 LEDs.
It belongs with the keyboards, iot & wireless and power & battery designs in this gallery.
From the project
ZMK based wireless half keyboard
Remember to attribute: https://github.com/daprice/keyswitches.pretty/tree/master
Attribute the Fanstel module footprint and symbols to: https://github.com/hemalchevli/Fanstel-kicad-library
- Premade digikey cart: https://www.digikey.fr/short/4dtv58d8
Main components on the Key-B-hardware
Key-B-hardware bill of materials (BOM)
63 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SRV05-4 | SOT-23-6 | U1 |
| 1 | BQ24075RGTR BQ24075 | VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm | U2 |
| 1 | BT840 | Fanstel_BT840 | U3 |
| 1 | 2N7002 | SOT-23 | Q1 |
| 1 | ECS-.327-9-34B-TR | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | USB4510-03-1-A | USB_C_Receptacle_GCT_USB4510-03-1-A | J1 |
| 1 | JST_S2B-PH-K-S Battery | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2 |
| 1 | Tag-Connect TC2030 | Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J3 |
| 1 | ERB-RE0R75V | Fuse_0603_1608Metric | F1 |
| 29 | KLH-CHC-BRN-010 ~ | Kailh_socket_PG1350_optional | S1, S2, S3, S4, S5, S6, S7, S8 +21 |
| 1 | PCM12SMTR PWR | SW_SPDT_PCM12 | SW1 |
| 1 | B3S-1000 Reset | SW_SPST_B3S-1000 | SW2 |
| 1 | LO Q976-PS-25-0-20-R18 orange | LED_0603_1608Metric | LED1 |
| 1 | 150060VS55040 green | LED_0603_1608Metric | LED2 |
| 1 | STS321050B100 | D_SOD-323 | D1 |
| 2 | BLM18SG121TN1D | L_0603_1608Metric | L1, L2 |
| 1 | CL10B104KB8NNWC 100 nF | C_0603_1608Metric | C1 |
| 3 | CL10A475KO8NNNC 4.7 uF | C_0603_1608Metric | C2, C3, C4 |
| 2 | CC0603JPNPO9BN120 12pF | C_0603_1608Metric | C5, C6 |
| 1 | RC0603FR-071ML 1 MOhm | R_0603_1608Metric | R1 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | RC0603FR-135K1L 5.1 kOhm | R_0603_1608Metric | R2, R3 |
| 1 | RC0603FR-1347KL 47 kOhm | R_0603_1608Metric | R4 |
| 2 | RC0603FR-131K5L 1.5 kOhm | R_0603_1608Metric | R5, R8 |
| 1 | RC0603FR-105K6L 5.6 kOhm | R_0603_1608Metric | R6 |
| 2 | RC0603FR-0710KL 10 kOhm | R_0603_1608Metric | R7, R10 |
| 1 | RC0603FR-07100RL 100 Ohm | R_0603_1608Metric | R9 |
| 1 | RC0603FR-07100KL 100 kOhm | R_0603_1608Metric | R11 |
| 1 | RC0603FR-13470RL 470 Ohm | R_0603_1608Metric | R12 |
Key-B-hardware design files
The KiCad project lives in the SaidAlvarado/Key-B-hardware repository on GitHub; these links point at the commit this page was built from.
- Layoutpcb/keyboard.kicad_pcb
- Schematicpcb/keyboard.kicad_sch
Key-B-hardware: common questions
How big is the Key-B-hardware PCB?
The Key-B-hardware measures 146 × 98.8 mm, has 4 copper layers and is 2 mm thick.
How many components are on the Key-B-hardware?
63 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the Key-B-hardware design files?
From the SaidAlvarado/Key-B-hardware repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Key-B-hardware design in my own project?
Yes, under the terms of its MIT license, which SaidAlvarado chose for the repository.
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