2 layers242.9 × 76.2 mm
MB44
melonbred/open-source-projects
This is a repository for all open-sourced or available files for my projects. PCBs will typically have their own repository linked in the table below.
118 parts16MIT
2 layers266.7 × 77 mm
KB Lightbar 1 straight
melonbred/open-source-projects16This is a repository for all open-sourced or available files for my projects. PCBs will typically have their own repository linked in the table below.
- Size
- 266.7 × 77 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 146
- Nets
- 105
- Pads
- 564
- Tracks, vias
- 739, 29
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 16 May 2021
- Updated
- 3 Mar 2026
Overview
KB Lightbar 1 straight is an open-source printed circuit board by melonbred, from the melonbred/open-source-projects repository on GitHub, published under the MIT licence. It is a 2-layer board of 266.7 × 77 mm with 146 parts on 105 nets, routed with 739 tracks and 29 vias.
It is built around the 1N4148W, WS2812B and DTC123JE, with the PRTR5V0U2X and RB060M-60TR among its other parts. Its parts include 51 diodes, 51 switches, 19 capacitors, 6 resistors and 2 ICs. It belongs with the STM32 boards of this library.
Main components
5
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
DTC123JE
SOT-523-55℃~+150℃ 1 NPN (Pre-Biased) 1.1V 100mA 150mW 2.2kΩ 250MHz 26 300mV 300mV 500mV@100uA,5V 50V 80 NPN SOT-523 Digital Transistors ROHSHXY MOSFETDigital Transistors
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
RB060M-60TR
SOD-123F1 Independent 2A 30A 50uA@60V 60V 610mV@2A SOD-123F Schottky Diodes ROHSROHM SemiconductorSchottky Diodes
README
README.mdopen-source-projects
Repository for projects by MelonBred
This is a repository for all open-sourced or available files for my projects. PCBs will typically have their own repository linked in the table below. Everything else will probably be found here in this repository but still linked in the tables below.
Keyboards
Project | Description | Available Files | Image |
|---|---|---|---|
| MBLB | 12.5u main cluster + macro column 40% keyboard, rotary encoder support, STM32 microprocessor. | KiCAD, Gerbers, .dxf, .step |  |
| MB-44 | The MB-44 is a 12.75u layout with a fun 65%-esque blocker separating the arrow cluster. | KiCAD, Gerbers, .dxf, .step |  |
| Pegasus | 12.75u 40% keyboard with 0.75u "WKL" blockers | KiCAD, Gerbers, .step, .fbx |  |
| MB-44 v2 | Update to the MB-44 with refreshed case and PCB. | KiCAD, Gerbers, .dxf, .fbx |  |
PCBs
| Project | Description | Available Files | Image |
|---|---|---|---|
| Program Yoink! | 12u main cluster with exploded arrows and macro columm | KiCAD, Gerbers |  |
| SPM1800 | Southpaw compact mini 1800 | KiCAD, Gerbers |  |
| kb-daughterboard | USB-C daughterboard with ESD, overcurrent and overvoltage protection. 2 versions available - USB-C receptacle flush with PCB and protruded | KiCAD, Gerbers, .step |  |
Miscellaneous
| Project | Description | Available Files | Image |
|---|---|---|---|
| MB-44 Plates | Plate files for the MB-44 keyboard | .dxf | |
| Encoder Knob | Generic knob that fits EC11 encoders. 3d printable. | .step, .stl |  |
Parts
146| Qty | Value | Footprint | References |
|---|---|---|---|
| 48 | 1N4148w | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +32 |
| 36 | SW_Push | MX_Only:MXOnly-1U-NoLED | SW1, SW2, SW10, SW11, SW12, SW14, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23, SW24, SW25 +20 |
| 8 | 100 | Capacitor_SMD:C_0805_2012Metric | C12, C13, C14, C15, C16, C17, C18, C19 |
| 8 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | RGB1, RGB2, RGB3, RGB4, RGB5, RGB6, RGB7, RGB8 |
| 6 | SW_Push | MX_Only:MXOnly-1.25U-NoLED | SW15, SW26, SW40, SW41, SW46, SW47 |
| 4 | Rotary_Encoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | RE1, RE2, RE3, RE4 |
| 3 | 100k | Resistor_SMD:R_0805_2012Metric | R1, R2, R5 |
| 3 | 100nF | Capacitor_SMD:C_0805_2012Metric | C4, C5, C6 |
| 3 | 1uF | Capacitor_SMD:C_0805_2012Metric | C1, C2, C11 |
| 2 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C9, C10 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R6, R7 |
| 2 | SW_Push | MX_Only:MXOnly-2U-ReversedStabilizers-NoLED | SW43, SW44 |
| 2 | SW_Push | MX_Only:MXOnly-1.75U-NoLED | SW28, SW38 |
| 2 | SW_Push | MX_Only:MXOnly-3U-ReversedStabilizers-NoLED | SW49, SW50 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric | R8 |
| 1 | 10nF | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D58 |
| 1 | 4.7nF | Capacitor_SMD:C_0805_2012Metric | C8 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | DTC123J | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | HRO-TYPE-C-31-M-12 | Type-C:HRO-TYPE-C-31-M-12-HandSoldering | USB1 |
| 1 | LOGO | silk:turtle_pan_cu_small | G*** |
| 1 | MCP1700-3302E_SOT23 | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | PRTR5V0U2X | random-keyboard-parts:SOT143B | D57 |
| 1 | Polyfuse_Small | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | RB060M-60TR | Diode_SMD:D_SOD-123 | D52 |
| 1 | STM32F072CBTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SW_Push | MX_Only:MXOnly-6U-Centered-ReversedStabilizers-NoLED | SW51 |
| 1 | SW_Push | random-keyboard-parts:SKQG-1155865 | SW48 |
| 1 | SW_Push | MX_Only:MXOnly-1.5U-NoLED | SW13 |
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Questions
How big is the KB Lightbar 1 straight PCB?
It measures 266.7 × 77 mm and has 2 copper layers, 1.6 mm thick.
What parts does the KB Lightbar 1 straight use?
146 parts, built around the 1N4148W, WS2812B, DTC123JE and PRTR5V0U2X. 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 KB Lightbar 1 straight KiCad files?
From the melonbred/open-source-projects repository on GitHub, at the commit this page was made from: the board is keyboards/mblb/kicad/KB_Lightbar_1_straight.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the KB Lightbar 1 straight 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).