2 layers61 × 61 mm
4 layers25 × 0.5 mm
MLS Schematic
NerdST/MIDILights-PCBThe PCB KiCAD schematic and board files for the MIDI Lights module.
- Size
- 25 × 0.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 94
- Nets
- 64
- Pads
- 287
- Tracks, vias
- 351, 91
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 30 Jun 2026
- Updated
- 30 Jun 2026
Overview
MLS Schematic is an open-source printed circuit board by NerdST, from the NerdST/MIDILights-PCB repository on GitHub. It is a 4-layer board of 25 × 0.5 mm with 94 parts on 64 nets, routed with 351 tracks and 91 vias.
It is built around the ESP32-C3, AP2112K-3.3 and WS2812B, with the B5819W, AO3400A and AO3401A among its other parts. Its parts include 37 capacitors, 21 diodes, 15 resistors, 4 transistors and 3 ICs. It belongs with the ESP32 and RISC-V boards of this library.
Main components
8
ESP32-C3
QFN-32-EP(5x5)12bit 160MHz 22 3V~3.6V Others QFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSEspressif SystemsMicrocontrollers (MCU/MPU/SOC)
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
B5819W
SOD-123-55℃~+125℃ 1.5A 1mA@40V 25A 40V 600mV@1A Standalone SOD-123 Schottky Diodes ROHSMDDSchottky Diodes
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 SemiconductorMOSFETsAO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
MF-MSMF050-2
1812-40℃~+85℃ 100A 150mΩ 15V 1A 1Ω 3.2mm 5.4mm 500mA 1812 Resettable Fuses ROHSBournsResettable Fuses
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)
Parts
94| Qty | Value | Footprint | References |
|---|---|---|---|
| 25 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26 +9 |
| 16 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21 |
| 6 | TestPoint | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1, TP2, TP3, TP4, TP5, TP6 |
| 5 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2, C4, C6, C7, C28 |
| 4 | 100k | Resistor_SMD:R_0402_1005Metric | R1, R4, R10, R12 |
| 4 | 10k | Resistor_SMD:R_0402_1005Metric | R13, R14, R15, R16 |
| 3 | B5819W | Diode_SMD:D_SOD-123 | D1, D3, D4 |
| 2 | 10p | Capacitor_SMD:C_0402_1005Metric | C35, C36 |
| 2 | 1Meg | Resistor_SMD:R_0402_1005Metric | R7, R9 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C32, C34 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R5, R6 |
| 2 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1, Q3 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q2, Q4 |
| 2 | TBD | Capacitor_SMD:C_0603_1608Metric | C37, C38 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C11 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 24nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 330 | Resistor_SMD:R_0402_1005Metric | R8 |
| 1 | 4.7k | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | Battery Conn | Connector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | J1 |
| 1 | Boot Jumper | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP1 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | ESP32-C3 | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.7x3.7mm | U4 |
| 1 | LED | LED_SMD:LED_0402_1005Metric | D2 |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | MF-MSMF050-2 | Fuse:Fuse_1812_4532Metric | F1 |
| 1 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | D5 |
| 1 | Power Button | Button_Switch_SMD:SW_SPST_TL3342 | SW1 |
| 1 | TBD | Inductor_SMD:L_0603_1608Metric | L2 |
| 1 | USB-C Receptacle | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J2 |
Questions
How big is the MLS Schematic PCB?
It measures 25 × 0.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the MLS Schematic use?
94 parts, built around the ESP32-C3, AP2112K-3.3, WS2812B and B5819W. 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 MLS Schematic KiCad files?
From the NerdST/MIDILights-PCB repository on GitHub, at the commit this page was made from: the board is MLS_Schematic.kicad_pcb and its schematic MLS_Schematic.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MLS Schematic design in my own project?
Its repository states no licence, so its author keeps all rights: ask NerdST before reusing the design.
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