4 layers86 × 90 mm
Sc02 drive
KVR-CIBER/sc02-solar-hypercar
SC-02 Solar Hypercar: 3D-printbare Le-Mans-racer op zonne-energie met Pi 4 + ESP32-S3, CadQuery-CAD en three.js-simulatie
94 parts
4 layers81 × 90.3 mm
Mildly Overkill
hackepeter101/Mildly-Overkill1todo.md was written entirely by AI. It's the list of everything it found. I read the suggestions, double-check them, and then fix them myself in KiCad, usually while muttering.
- Size
- 81 × 90.3 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 138
- Nets
- 107
- Pads
- 485
- Tracks, vias
- 767, 177
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 15 Sep 2026
- Updated
- 1 Nov 2026
Overview
Mildly Overkill is an open-source printed circuit board by hackepeter101, from the hackepeter101/Mildly-Overkill repository on GitHub. It is a 4-layer board of 81 × 90.3 mm with 138 parts on 107 nets, routed with 767 tracks and 177 vias.
It is built around the ESP32-S3-WROOM-1-N8, MCP3208-BI/P and AP7361C-33E, with the BZT52C3V0S, B5819W and AOD4185 among its other parts. Its parts include 46 resistors, 25 capacitors, 14 diodes, 9 connectors and 5 ICs. It belongs with the ESP32 boards of this library.
Main components
10
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MCP3208-BI/P
PDIP-16-40℃~+85℃ 0.5LSB 100kHz 12 1LSB 1MHz、2MHz 2.7V~5.5V 500nA 8 External External Multiplexers、Bipolar input Not supported SAR SPI Yes PDIP-16 Analog to Digital Converters (ADC) ROHSMicrochip TechnologyAnalog To Digital Converters (ADC)
AP7361C-33E
SOT-223-40℃~+85℃@(Ta) 1 1A 3.3V 340mV@(1A) 6V 75dB@(1kHz) 80uA Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown、Enable control Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BZT52C3V0S
SOD-323Zener Diodeshongjiacheng
B5819W
SOD-123-55℃~+125℃ 1.5A 1mA@40V 25A 40V 600mV@1A Standalone SOD-123 Schottky Diodes ROHSMDDSchottky Diodes
AOD4185
TO-252(DPAK)-55℃~+175℃ 1 P-Channel 15mΩ@10V 190pF 2.55nF 280pF 3V 40A 40V 55nC@10V 62.5W P-Channel TO-252(DPAK) MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
BLM21PG221SN1
0805SMD EMIFIL Suppression Chip Ferrite BeadMurataUncategorisedBZT52C15
SOD-123-65℃~+150℃ 1 Independent 100nA@1V 13.8V~15.6V 15V 200Ω 30Ω 370mW SOD-123 Zener Diodes ROHSDiodes IncorporatedZener Diodes
NCP18XH103F03RB
0603-40℃~+125℃ 0.8mm 1.6mm 100mW 10kΩ 1mW/℃ 310uA 3380K 3434K 3455K ±1% ±1% 0603 NTC Thermistors ROHSMurataNTC Thermistors
SMAJ24CA
DO-214AC(SMA)-55℃~+150℃ 10.3A 24V 26.7V 38.9V 400W 5uA Bidirectional TVS DO-214AC(SMA) ESD and Surge Protection (TVS/ESD) ROHSGOODWORKESD And Surge Protection (TVS/ESD)
README
README.mdSimple PLC-like Controller for Simple 24V Logic
Specifications I am aiming for:
Power & Protection
- 3S to 6S LiPo input support (including 24V)
- Onboard buck converter
- Reverse polarity protection
- Integrated fuse
Motor Control
- 2x DC motor drivers (H-bridges)
- 3A current rating per bridge
- Current sensing at the H-bridges
I/O & Interfaces
- Minimum of 8 total Inputs/Outputs (including H-bridge pins)
- STEMMA QT (I2C) connector
- USB-C port
- Physical Boot and Reset buttons
Why
I have a project I need this for. I've built boards like this before and was never fully happy with how they turned out, so this is my chance to do it properly.
Disclaimer: AI use
Every trace, every footprint and every questionable part choice on this board is mine. I placed and routed it all by hand. AI didn't draw a single line of copper. What I am doing is testing whether AI is any good at spotting my mistakes before a fab house turns them into expensive coasters.
todo.md was written entirely by AI. It's the list of everything it found. I read the suggestions, double-check them, and then fix them myself in KiCad, usually while muttering.
Still not sure a human made this? Read the commit history. It's an emotional journey. It goes from a confident "cirrcuit done" to "Insane amounts of routing" to "I cant do this anymore", then "Ill redo routing i guess", then "DONE!!!", and finally the very honest "Done for now". No AI writes commit messages that sound this tired.
This section was also written with AI. The suffering in the commit history was not.
Parts
138| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1k | Resistor_SMD:R_0603_1608Metric | R13, R15, R17, R19, R45, R46, R47, R48 |
| 7 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R12, R14, R16, R18, R52 |
| 6 | LED | LED_SMD:LED_0603_1608Metric | D1, D2, D11, D12, D13, D23 |
| 5 | 0.1uF 50V | Capacitor_SMD:C_0603_1608Metric | C7, C8, C9, C15, C23 |
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C5, C19 |
| 4 | 10K | Resistor_SMD:R_0603_1608Metric | R6, R7, R56, R63 |
| 4 | 10uF 50V | Capacitor_SMD:C_1210_3225Metric | C14, C21, C22, C24 |
| 4 | 3.01k | Resistor_SMD:R_0603_1608Metric | R32, R34, R36, R38 |
| 4 | 6.04k | Resistor_SMD:R_0603_1608Metric | R33, R35, R37, R39 |
| 4 | BZT52C3V0S | Diode_SMD:D_SOD-323 | D6, D7, D8, D10 |
| 4 | MountingHole | MountingHole:MountingHole_2.1mm | H1, H2, H3, H4 |
| 2 | 0.022uF 50V | Capacitor_SMD:C_0603_1608Metric | C6, C18 |
| 2 | 2.37k | Resistor_SMD:R_0603_1608Metric | R8, R11 |
| 2 | 210 | Resistor_SMD:R_0603_1608Metric | R53, R61 |
| 2 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R20, R21 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R3, R5 |
| 2 | 665 | Resistor_SMD:R_0603_1608Metric | R9, R10 |
| 2 | B5819W | Diode_SMD:D_SOD-123 | D5, D22 |
| 2 | DRV8874PWPR | Snapeda:PWP0016J_L | U8, U9 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_PTS647_Sx50 | BOOT1, RST1 |
| 1 | 10.7K | Resistor_SMD:R_0603_1608Metric | R57 |
| 1 | 1000uF 35V | Capacitor_THT:CP_Radial_D16.0mm_P7.50mm | C16 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 100nF 50V | Capacitor_SMD:C_0603_1608Metric | C13 |
| 1 | 10A | Fuse:Fuseholder_Blade_Mini_Keystone_3568 | F1 |
| 1 | 10k 1% | Resistor_SMD:R_0603_1608Metric | R77 |
| 1 | 10uF | Capacitor_SMD:C_1206_3216Metric | C4 |
| 1 | 10uF 10V X5R | Capacitor_SMD:C_0603_1608Metric | C17 |
| 1 | 1K | Resistor_SMD:R_0603_1608Metric | R51 |
| 1 | 1uF 10V | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 2.2uF | Capacitor_SMD:C_1206_3216Metric | C25 |
| 1 | 22K | Resistor_SMD:R_0603_1608Metric | R40 |
| 1 | 22uF 10V X5R | Capacitor_SMD:C_0603_1608Metric | C20 |
| 1 | 3.3V | TestPoint:TestPoint_Loop_D2.50mm_Drill1.85mm | TP3 |
| 1 | 3.3uH | Library:WE-XHMI 4.3x4.3 | L1 |
| 1 | 33nF | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 39K | Resistor_SMD:R_0603_1608Metric | R49 |
| 1 | 402 | Resistor_SMD:R_0603_1608Metric | R54 |
| 1 | 47uF 10V X5R | Capacitor_SMD:C_0805_2012Metric | C11 |
| 1 | 5.6pF | Capacitor_SMD:C_0603_1608Metric | C10 |
| 1 | 52.3K | Resistor_SMD:R_0603_1608Metric | R55 |
| 1 | 5V | TestPoint:TestPoint_Loop_D2.50mm_Drill1.85mm | TP4 |
| 1 | 82K | Resistor_SMD:R_0603_1608Metric | R50 |
| 1 | AOD4185 | Package_TO_SOT_SMD:TO-252-2 | Q1 |
| 1 | AP7361C-33E | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | Analog | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J9 |
| 1 | BLM21PG221SN1 | Inductor_SMD:L_0805_2012Metric | FB1 |
| 1 | BZT52C15 | Diode_SMD:D_SOD-123 | D3 |
| 1 | Conn_01x04_MountingPin | Connector_JST:JST_SH_BM04B-SRSS-TB_1x04-1MP_P1.00mm_Vertical | J6 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | Conn_01x07_Pin | Connector_PinSocket_2.54mm:PinSocket_1x07_P2.54mm_Vertical | J10 |
| 1 | Conn_01x08_Pin | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | J11 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U1 |
| 1 | G*** | kibuzzard-6ACBD3AA | kibuzzard-6ACBD3AA |
| 1 | G*** | kibuzzard-6ACBD341 | kibuzzard-6ACBD341 |
| 1 | G*** | kibuzzard-6ACBD410 | kibuzzard-6ACBD410 |
| 1 | G*** | kibuzzard-6ACBD41A | kibuzzard-6ACBD41A |
| 1 | G*** | kibuzzard-6ACBD423 | kibuzzard-6ACBD423 |
| 1 | G*** | kibuzzard-6ACBD3B0 | kibuzzard-6ACBD3B0 |
| 1 | G*** | kibuzzard-6ACBD473 | kibuzzard-6ACBD473 |
| 1 | G*** | kibuzzard-6ACBE024 | kibuzzard-6ACBE024 |
| 1 | G*** | kibuzzard-6ACBD3D5 | kibuzzard-6ACBD3D5 |
| 1 | G*** | kibuzzard-6ACBD409 | kibuzzard-6ACBD409 |
| 1 | G*** | kibuzzard-6ACBD50A | kibuzzard-6ACBD50A |
| 1 | G*** | kibuzzard-6ACBD573 | kibuzzard-6ACBD573 |
| 1 | G*** | kibuzzard-6ACBD1B3 | kibuzzard-6ACBD1B3 |
| 1 | G*** | kibuzzard-6ACBD3CF | kibuzzard-6ACBD3CF |
| 1 | G*** | kibuzzard-6ACBD5E0 | kibuzzard-6ACBD5E0 |
| 1 | G*** | kibuzzard-6ACBD168 | kibuzzard-6ACBD168 |
| 1 | G*** | kibuzzard-6ACBD5D3 | kibuzzard-6ACBD5D3 |
| 1 | G*** | kibuzzard-6ACBD34D | kibuzzard-6ACBD34D |
| 1 | G*** | kibuzzard-6ACBD433 | kibuzzard-6ACBD433 |
| 1 | GND | TestPoint:TestPoint_Loop_D2.50mm_Drill1.85mm | TP1 |
| 1 | GND | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J7 |
| 1 | IO | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J4 |
| 1 | MCP3208 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | Motors | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J3 |
| 1 | NCP18XH103F03RB | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | TH1 |
| 1 | SMAJ24CA | Diode_SMD:D_SMA | D4 |
| 1 | Screw_Terminal_01x02 | Connector_Phoenix_MSTB:PhoenixContact_MSTBA_2,5_2-G_1x02_P5.00mm_Horizontal | J2 |
The 132 most common of 138 parts.
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Questions
How big is the Mildly Overkill PCB?
It measures 81 × 90.3 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Mildly Overkill use?
138 parts, built around the ESP32-S3-WROOM-1-N8, MCP3208-BI/P, AP7361C-33E and BZT52C3V0S. 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 Mildly Overkill KiCad files?
From the hackepeter101/Mildly-Overkill repository on GitHub, at the commit this page was made from: the board is MildlyOverkill.kicad_pcb and its schematic H-Bridge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mildly Overkill design in my own project?
Its repository states no licence, so its author keeps all rights: ask hackepeter101 before reusing the design.