2 layers86 × 78.3 mm
2 layers228.6 × 152.4 mm
MainPCB
0x9ONU/BOREALIS1- Size
- 228.6 × 152.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 71
- Nets
- 109
- Pads
- 361
- Tracks, vias
- 720, 59
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 19 Oct 2025
- Updated
- 6 Apr 2026
Overview
MainPCB is an open-source printed circuit board by 0x9ONU, from the 0x9ONU/BOREALIS repository on GitHub. It is a 2-layer board of 228.6 × 152.4 mm with 71 parts on 109 nets, routed with 720 tracks and 59 vias.
It is built around the AP62250WU, LM27762DSS and LTV-847, with the 1N4148WT and KC15A9.501NPF among its other parts. Its parts include 18 capacitors, 12 resistors, 9 ICs, 3 connectors and 3 inductors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
5
AP62250WU
TSOT-26-40℃~+85℃ 1 1.3MHz 155uA 2.5A 4.2V~18V 800mV~7V Adjustable Buck Buck Built-in Yes TSOT-26 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
LM27762DSS
WSON-12-EP(2x3)-40℃~+85℃ -5V~-1.5V、1.5V~5V 2.5Ω 2.7V~5.5V 250mA 2MHz 390uA Inverted Support WSON-12-EP(2x3) Charge Pumps ROHSTexas InstrumentsCharge Pumps
LTV-847
DIP-16-30℃~+110℃ 1.2V 100mV@20mA,1mA 200mW 35V 3us 4 4us 50% 50mA 50mA 5kV 600% 6V DC Phototransistor DIP-16 Transistor, Photovoltaic Output Optoisolators ROHSLite-OnTransistor, Photovoltaic Output Optoisolators
1N4148WT
SOD-523-55℃~+150℃ 1.25V@150mA 100V 150mA 150mW 1uA@75V 2A 4ns Independent SOD-523 Switching Diodes ROHShongjiachengSwitching DiodesKC15A9.501NPF
-1 1 125V 30° 5 Flat PC Pin - Rotary Switches ROHSE-SwitchRotary Switches
README
README.mdBOREALIS
Parts
71| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | ~ | Potentiometers_New:Small Pot | UBP1, UBS1, UHP1, UHP2, ULP1, ULP2 |
| 5 | 1uF | Capacitor_SMD:C_0402_1005Metric | C6, C9, C10, C11, C18 |
| 4 | 10nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C12, C13, C14, C15 |
| 4 | 50k | Resistor_SMD:R_0402_1005Metric | R5, R6, R11, R12 |
| 4 | ~ | Potentiometers_New:Big Pot | UA1, UD1, UR1, US1 |
| 4 | ~ | RGB_Encoder:Encoder | Enc1, Enc2, Enc3, EncMenu1 |
| 3 | 100nF | Capacitor_SMD:C_0201_0603Metric | C2, C16, C17 |
| 3 | 86.6k | Resistor_SMD:R_0603_1608Metric | R4, R9, R10 |
| 3 | ~ | Audio Jack:Audio_Jack | U5, U6, U7 |
| 2 | 10mH | Inductor_THT:L_Radial_D8.7mm_P5.00mm_Fastron_07HCP | L2, L3 |
| 2 | 22uF | Capacitor_SMD:C_0805_2012Metric | C4, C5 |
| 2 | AD8226BRZ-RL | Amplifier_Capstone:R_8_ADI | U4, U14 |
| 2 | ~ | 5501M1BLKX:Untitled | SwB1, SwF1 |
| 2 | ~ | Potentiometers_New:Slide Pot | PotMod1, PotVol1 |
| 1 | 10k | Resistor_SMD:R_0201_0603Metric | R2 |
| 1 | 10nF | Capacitor_SMD:C_0201_0603Metric | C3 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 1N4148WT | Diode_SMD:D_SOD-523 | D1 |
| 1 | 2.2uF | Capacitor_SMD:C_0201_0603Metric | C7 |
| 1 | 220 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R7 |
| 1 | 280 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R8 |
| 1 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C8 |
| 1 | 4.7uH | Inductor_SMD:L_APV_ANR6028 | L1 |
| 1 | 52.3k | Resistor_SMD:R_0201_0603Metric | R1 |
| 1 | 54-00166 | Power_Capstone:CONN3_54-00166_TEN | J3 |
| 1 | 87.6k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | AP62250WU | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | Arduino_Nano_Every | Module:Arduino_Nano | A2 |
| 1 | Conn_01x07_Pin | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J2 |
| 1 | DIN-5 | Resistor_THT:R_Array_SIP5 | J1 |
| 1 | Electrosmith_Daisy_Seed_Rev4 | Module:Electrosmith_Daisy_Seed | A1 |
| 1 | KC15A9.501NPF | 5_Way_Capstone:KC15A9.501NPF_EWI | SW1 |
| 1 | LM27762 | Package_SON:WSON-12-1EP_3x2mm_P0.5mm_EP1x2.65_ThermalVias | U2 |
| 1 | LOGO | miku | G*** |
| 1 | LOGO | 5_Way_Capstone:borealis | G*** |
| 1 | LOGO | 5_Way_Capstone:miku | G*** |
| 1 | LOGO | hassan | G*** |
| 1 | LTV-847 | Package_DIP:DIP-16_W7.62mm | U3 |
| 1 | ~ | Capstone_Top:Top Plate | U15 |
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Questions
How big is the MainPCB PCB?
It measures 228.6 × 152.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MainPCB use?
71 parts, built around the AP62250WU, LM27762DSS, LTV-847 and 1N4148WT. 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 MainPCB KiCad files?
From the 0x9ONU/BOREALIS repository on GitHub, at the commit this page was made from: the board is kicad/MainPCB/MainPCB.kicad_pcb and its schematic kicad/MainPCB/MainPCB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MainPCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask 0x9ONU before reusing the design.