2 layers70 × 140 mm PCB V1, the printed circuit board in 3D

PCB V1

BEng Dissertation; Penetration-testing device to highlight security system vulnerabilities

Size: 70 × 140 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 46
Nets: 74
Pads: 240
Tracks, vias: 405, 34
Pours: 1
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 5 Nov 2024
Updated: 23 Feb 2026

Overview

PCB V1 is an open-source printed circuit board by Jonathan-0101, from the Jonathan-0101/skeletonKey repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 70 × 140 mm with 46 parts on 74 nets, routed with 405 tracks and 34 vias.

It is built around the CP2104EK, ESP32-WROOM-32E and AP2112K-3.3, with the USBLC6-2P6, BLM21PG221SH1 and DMG3415U among its other parts. Its parts include 13 capacitors, 13 resistors, 5 ICs, 2 diodes and 2 transistors. It belongs with the radio and wireless boards and the ESP32 boards of this library.

Main components

README

README.md

Skeleton Key

Final year BEng Project, creating a Penetration Testing Device based on an ESP32 microcontroller, to highlight common and prevelent security vulnerabilities in devices and networks.

Parts

Qty	Value	Footprint	References
4	10K	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R1, R9, R12, R13
4	Hole_Pad	MountingHole:MountingHole_2.2mm_M2_Pad_Via	H1, H2, H3, H4
3	100n	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C6, C13
3	22u	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C3, C9, C11
2	100n	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C4, C12
2	10u	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C2, C8
2	1K	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R6, R7
2	22R	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R10, R11
2	5k1	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R4, R5
1	100k	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R3
1	10k	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R8
1	1u	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C5
1	1u	Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder	C10
1	4.K	Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R2
1	4u7	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C7
1	AP2112K-3.3	Package_TO_SOT_SMD:SOT-23-5	U2
1	BLM21PG221	Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder	FB1
1	Battery Plug	Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal	JSTPH1
1	CP2104	Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm	U4
1	Charging_LED	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D1
1	DMG3415U	DGM3415U:SOT95P240X105-3N	Q1
1	ESP32-WROOM-32E	RF_Module:ESP32-WROOM-32D	U5
1	MBR120	MBR120:SDO_SOD-123FL498_OSI	CR1
1	MCP73831-2-OT	Package_TO_SOT_SMD:SOT-23-5	U1
1	Polyfuse 1A	Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder	F1
1	Power_LED	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D2
1	Power_Switch	Button_Switch_THT:SW_DIP_SPSTx01_Slide_9.78x4.72mm_W7.62mm_P2.54mm	SW1
1	Reset Button	Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK	SW2
1	UMH3N	Package_TO_SOT_SMD:SOT-363_SC-70-6	Q2
1	USBLC6-2P6	Package_TO_SOT_SMD:SOT-666	U3
1	USB_C_Receptacle_USB2.0_16P	Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12	J1

Questions

How big is the PCB V1 PCB?

It measures 70 × 140 mm and has 2 copper layers, 1.6 mm thick.

What parts does the PCB V1 use?

46 parts, built around the CP2104EK, ESP32-WROOM-32E, AP2112K-3.3 and USBLC6-2P6. 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 PCB V1 KiCad files?

From the Jonathan-0101/skeletonKey repository on GitHub, at the commit this page was made from: the board is Hardware/PCB V1/PCB/PCB.kicad_pcb and its schematic Hardware/PCB V1/PCB V1.0/PCB V1.0/PCB V1.0(PN5180).kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the PCB V1 design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

Radio and wireless ESP32

Topics

bluetooth esp32 infrared pentesting rfid rf security subghz wifi

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/jonathan-0101-skeletonkey-pcb" title="PCB V1 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/jonathan-0101-skeletonkey-pcb.jpg" alt="PCB V1" width="1200" height="900">

A picture that opens the board, for a README

[![PCB V1](https://pcbkit.io/embed/boards/jonathan-0101-skeletonkey-pcb.jpg?size=s)](https://pcbkit.io/boards/jonathan-0101-skeletonkey-pcb)

Source

Repository: Jonathan-0101/skeletonKey
Board file: Hardware/PCB V1/PCB/PCB.kicad_pcb
Commit: f2ee520
Homepage: jonathan-0101.github.io/skeletonKey
Licence: GPL-3.0

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