4 layers100 × 100 mm Cocoro, the printed circuit board in 3D

Cocoro

Printed circuit board designs (KiCad)

Size: 100 × 100 mm
Copper layers: 4
Thickness: 1.61 mm
Parts: 50
Nets: 56
Pads: 213
Tracks, vias: 501, 68
Pours: 9
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 2 Apr 2023
Updated: 22 Apr 2024

Overview

Cocoro is an open-source printed circuit board by zoftko, from the zoftko/pcrap repository on GitHub, published under the BSD-3-Clause licence. It is a 4-layer board of 100 × 100 mm with 50 parts on 56 nets, routed with 501 tracks and 68 vias.

It is built around the STM8S105K6B6, DHT11 and FDN340P, with the MINISMDC050F-2 among its other parts. Its parts include 16 diodes, 12 capacitors, 4 connectors, 3 ICs and 3 transistors. It belongs with the STM8 boards of this library.

Main components

README

cocoro/README.md

title: Heart shaped RGB LED Array brief: This board includes a heart shaped RGB LED array and the components to control said array through a simple user interface.

cocoro

The idea behind this board is to function as a night light. It uses an STM8s MCU to control different characteristics such as color or brightness. The user interface consists of a rotary encoder and a small I2C OLED display, based on the SD1306 controller.

Warnings

The P Channel Mosfets (FDN340P) placement to turn on the LEDs (high side switch) is wrong. Pin assignment is wrong. For example, the PCB layout marks the source as being the gate. The part needs to be rotated 90° to the left for pins to be properly placed.

Parts

Qty	Value	Footprint	References
16	LED_RKGB	LED_THT:LED_D5.0mm-4_RGB_Staggered_Pins	D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16
4	100n	Capacitor_SMD:C_0603_1608Metric	C1, C4, C6, C7
4	MountingHole	MountingHole:MountingHole_3.2mm_M3	H1, H2, H3, H4
3	1u	Capacitor_SMD:C_1206_3216Metric	C3, C8, C9
3	FDN340P	Package_TO_SOT_SMD:TSOT-23	Q1, Q2, Q3
3	TBD	Capacitor_SMD:C_0805_2012Metric	C10, C11, C12
2	100n	Capacitor_SMD:C_0805_2012Metric	C2, C5
2	Conn_01x04_Pin	Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical	J2, J3
2	V55MLA0603LNR	Resistor_SMD:R_0603_1608Metric	RV1, RV2
1	11k	Resistor_SMD:R_0603_1608Metric	R2
1	220@100MHz	Inductor_SMD:L_0603_1608Metric	FB1
1	5.1k	Resistor_SMD:R_0603_1608Metric	R1
1	Conn_01x10_Pin	Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical	J4
1	DHT11	Sensor:Aosong_DHT11_5.5x12.0_P2.54mm	U1
1	LED1642GWTTR	Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm	U3
1	MINISMDC050F-2	pcrap:MINISMDC050F2	F1
1	RotaryEncoder_Switch	Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm	SW1
1	STM8S105K6	Package_QFP:LQFP-32_7x7mm_P0.8mm	U2
1	SW_Push	Button_Switch_SMD:SW_SPST_PTS810	SW2
1	USB_B_Micro	pcrap:USB_Micro-B_SHOU_HAN_MICRO_XNJ_ZB	J1

Questions

How big is the Cocoro PCB?

It measures 100 × 100 mm and has 4 copper layers, 1.61 mm thick.

What parts does the Cocoro use?

50 parts, built around the STM8S105K6B6, DHT11, FDN340P and MINISMDC050F-2. 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 Cocoro KiCad files?

From the zoftko/pcrap repository on GitHub, at the commit this page was made from: the board is cocoro/cocoro.kicad_pcb and its schematic cocoro/cocoro.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Cocoro design in my own project?

Its repository publishes it under the BSD-3-Clause 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

STM8

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/zoftko-pcrap-cocoro" title="Cocoro 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/zoftko-pcrap-cocoro.jpg" alt="Cocoro" width="1200" height="900">

A picture that opens the board, for a README

[![Cocoro](https://pcbkit.io/embed/boards/zoftko-pcrap-cocoro.jpg?size=s)](https://pcbkit.io/boards/zoftko-pcrap-cocoro)

Source

Repository: zoftko/pcrap
Board file: cocoro/cocoro.kicad_pcb
Commit: 59ce903
Homepage: zoftko.github.io/pcrap
Licence: BSD-3-Clause

Similar boards

4 layers51.8 × 45.1 mm
Spark rp2040-swd probe
emb3rcia/spark-rp2040-swd-probe
Open-source financialy-accesible SWD probe.
72 parts1
4 layers100 × 150 mm
BeepyRcBrd only top
ElectronPlant/beepy_rc
Hobby project to make a RC rover platform using spare RC parts.
173 parts
4 layers100 × 80 mm
Scopeboy
leslier7/scopeboy
Polished version of the ScopeBoy project started in ECE5730
151 parts
4 layers112 × 60 mm
Pluto cal switch
misko/prompt2device
The separate vNext PCB skill and orchestrator package is available alongside the reference workflow below; existing projects keep their accepted toolchain until an explicit migration.
77 parts3MIT
4 layers240 × 130 mm
TTF Base
dermatoid-collab/EVC_FW
Progetto hardware e firmware del sistema di controllo di un ascensore domestico a trazione (TTF) di LiftingItalia s.r.l. Quattro schede basate su STM32F446, collegate in CAN; il motore è comandato da un VFD.
420 parts
4 layers165.1 × 63.5 mm
Contextualelectronics benchbudee benchbuddy
oomlout/oomlout_oomp_project_bot_v_2

163 parts
10 layers224.5 × 160 mm
Haasoscope pro adc fpga board
drandyhaas/HaasoscopePro
Affordable 2 GHz 3.2 GS/s 12 bit open-source open-hardware expandable USB real-time oscilloscope
586 parts485MIT
4 layers46.8 × 34.8 mm
SmartWatch V4
Bellafaire/ESP32-Smart-Watch
An open source smartwatch based on the ESP32 compatible with the Arduino IDE.
74 parts258MIT