2 layers100 × 100 mm CPU, the printed circuit board in 3D

CPU

Size: 100 × 100 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 82
Nets: 153
Pads: 463
Tracks, vias: 1,524, 194
Pours: 1
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 12 May 2026
Updated: 20 Aug 2026

Overview

CPU is an open-source printed circuit board by f4deb, from the f4deb/Kicad repository on GitHub. It is a 2-layer board of 100 × 100 mm with 82 parts on 153 nets, routed with 1,524 tracks and 194 vias.

It is built around the ESP32-WROOM-32, TJA1051T and FT232RL, with the AT24CS01-SSHM-B, LM1117DT-2.5 and PCA9306D among its other parts. Its parts include 35 resistors, 17 capacitors, 11 ICs, 7 diodes and 6 connectors. It belongs with the ESP32 boards of this library.

Main components

README

README.md

Kicad

Parts

Qty	Value	Footprint	References
9	0	Resistor_SMD:R_0603_1608Metric	R207, R210, R212, R214, R216, R218, R404, R406, R407
9	100n	Capacitor_SMD:C_0603_1608Metric	C302, C303, C401, C403, C404, C405, C406, C408, C601
6	2k2	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R208, R209, R211, R213, R215, R217
5	330	Resistor_SMD:R_0603_1608Metric	R204, R411, R412, R413, R414
4	2.2K	Resistor_SMD:R_0603_1608Metric	R202, R203, R205, R206
4	2k2	Resistor_SMD:R_0603_1608Metric	R219, R220, R402, R403
2	10F/2.7V	Capacitor_THT:CP_Radial_Tantal_D10.5mm_P5.00mm	C201, C202
2	4k7	Resistor_SMD:R_0603_1608Metric	R408, R409
2	BSR19	Package_TO_SOT_SMD:SOT-23	Q601, Q602
2	Conn_02x20_Odd_Even	Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical	J501, J502
2	LED_Dual_KAK	LED_SMD:LED_Kingbright_KPA-3010_3x2x1mm	D403, D404
2	ORANGE	LED_SMD:LED_0603_1608Metric	D401, D402
2	~	Connector_PinSocket_2.54mm:PinSocket_2x05_P2.54mm_Horizontal	J601, J602
1	10k	Resistor_SMD:R_0603_1608Metric	R401
1	10n	Capacitor_SMD:C_0603_1608Metric	C203
1	120	Resistor_SMD:R_1206_3216Metric	R410
1	150	Resistor_SMD:R_0603_1608Metric	R201
1	2.7n	Capacitor_SMD:C_0603_1608Metric	C602
1	22µ	Capacitor_Tantalum_SMD:CP_EIA-3216-10_Kemet-I	C301
1	22µ	Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B	C304
1	22µ	Inductor_SMD:L_1008_2520Metric	L401
1	22µ/10V	Capacitor_Tantalum_SMD:CP_EIA-3216-10_Kemet-I	C402
1	2K	Resistor_SMD:R_0603_1608Metric	R301
1	32.278kHz	Crystal:Crystal_SMD_Abracon_ABS25-4Pin_8.0x3.8mm	Y201
1	4.7µ/10V	Capacitor_Tantalum_SMD:CP_EIA-3216-12_Kemet-S	C407
1	AT24CS01-SSHM	Package_SO:SOIC-8_5.3x5.3mm_P1.27mm	U207
1	Conn_01x04	Connector_JST:JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal	J102
1	D_Schottky	Diode_SMD:D_1206_3216Metric	D201
1	ESP32-WROOM-32	RF_Module:ESP32-WROOM-32	U401
1	FT232RL	Package_SO:SSOP-28_5.3x10.2mm_P0.65mm	U402
1	LM1117DT-2.5	Package_TO_SOT_SMD:TO-252-3_TabPin2	U301
1	LM75A	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U201
1	MCP23017_SS	Package_SO:SSOP-28_5.3x10.2mm_P0.65mm	U205
1	NC	Resistor_SMD:R_0603_1608Metric	R405
1	PCA9306	Package_SO:VSSOP-8_2.3x2mm_P0.5mm	U202
1	PCF8563T	Package_SO:MSOP-8_3x3mm_P0.65mm	U203
1	RED	LED_SMD:LED_0603_1608Metric	D202
1	RED LED	LED_SMD:LED_0603_1608Metric	D301
1	SAA1064T	Package_SO:SOP-24_7.5x15.4mm_P1.27mm	U601
1	SW_Push_45deg	Button_Switch_THT:SW_Tactile_SKHH_Angled	SW102
1	SW_Push_45deg	Button_Switch_SMD:SW_SPST_CK_RS282G05A3	SW101
1	TCA9544A	Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm	U204
1	TJA1051T	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U403
1	USB_B_Mini	Connector_USB:USB_Mini-B_Wuerth_65100516121_Horizontal	J101

Questions

How big is the CPU PCB?

It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.

What parts does the CPU use?

82 parts, built around the ESP32-WROOM-32, TJA1051T, FT232RL and AT24CS01-SSHM-B. 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 CPU KiCad files?

From the f4deb/Kicad repository on GitHub, at the commit this page was made from: the board is CPU_ESP/V0.1/CPU/CPU.kicad_pcb and its schematic ARP-RER-NG_Etuve-IN/ARP-RER-NG_Etuve-IN/ARP-RER-NG_Etuve-IN.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the CPU design in my own project?

Its repository states no licence, so its author keeps all rights: ask f4deb before reusing the design.

Category and platform

ESP32

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/f4deb-kicad-cpu" title="CPU 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/f4deb-kicad-cpu.jpg" alt="CPU" width="1200" height="900">

A picture that opens the board, for a README

[![CPU](https://pcbkit.io/embed/boards/f4deb-kicad-cpu.jpg?size=s)](https://pcbkit.io/boards/f4deb-kicad-cpu)

Source

Repository: f4deb/Kicad
Board file: CPU_ESP/V0.1/CPU/CPU.kicad_pcb
Commit: 3eba87b
Licence: Not stated

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