4 layers70 × 60 mm Marelleo, the printed circuit board in 3D

Marelleo

Une boîte qui raconte une histoire quand on pose une figurine dessus. Boîtier, carte, micrologiciel et doc pour la refaire.

Full screen GitHub .kicad_pcb

Size: 70 × 60 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 57
Nets: 45
Pads: 253
Tracks, vias: 491, 86
Pours: 9
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 16 Oct 2026
Updated: 27 Oct 2026

Overview

Marelleo is an open-source printed circuit board by Zebra-Rodeo, from the Zebra-Rodeo/marelleo repository on GitHub. It is a 4-layer board of 70 × 60 mm with 57 parts on 45 nets, routed with 491 tracks and 86 vias.

It is built around the ESP32-S3-WROOM-1-N8R2, M2.5 and SS34. Its parts include 19 resistors, 13 capacitors, 8 connectors, 5 ICs and 2 inductors. It belongs with the audio and music and radio and wireless boards and the ESP32 boards of this library.

Main components

README

carte/README.md

The board

English · Français

Four layers, 1.6 mm, 60 × 70 mm. The files are ready to order.

File	Role
`marelleo-gerbers.zip`	upload as is to the manufacturer
`fab/marelleo-bom.csv`	the bill of materials, JLCPCB format
`fab/marelleo-cpl.csv`	the component positions, JLCPCB format
`composants.csv`	the same list, readable, with LCSC part numbers
`marelleo.kicad_pcb`	the board itself, to modify it
`generer.py`	the script that draws it: the board is generated, not clicked
`stock.py`	checks LCSC stock on the day you order
`schema.md`	read it before ordering

schema.md carries the choices, the measurements taken at the bench and the traps that cost me evenings: the charger that suspends charging when you turn the box off, the NFC module that blinks instead of starting, the diode whose rotation has to be corrected by 180 degrees in JLCPCB's preview.

Five assembled boards came to about 160 euros, so 32 euros a board with components placed.

The board, seen from above

Category and platform

Audio and music Radio and wireless ESP32

Topics

3d-printing audio diy esp32 kicad kids nfc

Project files

Show this board on your page

https://pcbkit.io/boards/Zebra-Rodeo/marelleo

The board's own page, for a message or a post.

Source

Repository: Zebra-Rodeo/marelleo
Board file: carte/marelleo.kicad_pcb
Commit: f7cbdb6
Homepage: zebra.rodeo/blog/marelleo
Licence: Not stated

Parts

Qty	Value	Footprint	References
5	10 k	R_0603_1608Metric	R2, R9, R16, R17, R18
5	10 uF	C_0805_2012Metric	C3, C6, C7, C8, C10
5	100 k	R_0603_1608Metric	R3, R6, R10, R11, R19
4	M2.5	MountingHole_2.7mm_M2.5	H1, H2, H3, H4
3	100 nF	C_0603_1608Metric	C5, C9, C12
3	22 uF	C_0805_2012Metric	C1, C2, C4
2	4,7 uH	L_Taiyo-Yuden_MD-4040	L1, L2
2	5,1 k	R_0603_1608Metric	R14, R15
2	NP	R_0603_1608Metric	R5, R13
1	0 R	R_0603_1608Metric	R4
1	1 M	R_0603_1608Metric	R12
1	1 k	R_0603_1608Metric	R7
1	1 uF	C_0603_1608Metric	C13
1	1,5 k	R_0603_1608Metric	R8
1	2N7002	SOT-23	Q1
1	470 uF	CP_Elec_6.3x7.7	C11
1	75 k	R_0603_1608Metric	R1
1	AP63203WU, abaisseur 3V3	TSOT-23-6	U3
1	BQ24075RGT, chargeur a chemin d'alimentation	VQFN-16-1EP_3x3mm_P0.5mm_EP1.1x1.1mm	U2
1	ESP32-S3-WROOM-1-N8R2	ESP32-S3-WROOM-1	U1
1	GND	TestPoint_Pad_D1.5mm	TP4
1	MAX98357A	TQFN-16-1EP_3x3mm_P0.5mm_EP1.23x1.23mm	U5
1	MT3608, elevateur 5V	SOT-23-6	U4
1	SS34	D_SMA	D1
1	TEST_IO0	TestPoint_Pad_D1.5mm	TP1
1	TEST_RX	TestPoint_Pad_D1.5mm	TP2
1	TEST_TX	TestPoint_Pad_D1.5mm	TP3
1	USB-C, charge et mise a jour	USB_C_Receptacle_Amphenol_12401610E4-2A	J1
1	batterie	JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal	J6
1	bouton	JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal	J5
1	connecteur microSD	microSD_HC_Hirose_DM3AT-SF-PEJM5	J7
1	haut-parleurs	JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal	J3
1	interrupteur du potentiometre	JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal	J8
1	potentiometre de volume	JST_PH_S3B-PH-K_1x03_P2.00mm_Horizontal	J4
1	vers le lecteur NFC deporte	JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal	J2

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Questions

How big is the Marelleo PCB?

It measures 70 × 60 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Marelleo use?

57 parts, built around the ESP32-S3-WROOM-1-N8R2, M2.5 and SS34. 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 Marelleo KiCad files?

From the Zebra-Rodeo/marelleo repository on GitHub, at the commit this page was made from: the board is carte/marelleo.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Marelleo design in my own project?

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