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Nekomimi led Atom

washishi·nekomimi_led_Atom·schematics/Nekomimi_atom.kicad_pcb

Nekomimi led Atom PCB layout, top view — open source RISC-V board by washishi
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About the Nekomimi led Atom PCB

Nekomimi led Atom is an open source RISC-V PCB design by washishi, published on GitHub under the MIT license. It is a 2-layer board measuring 22.2 × 29.7 mm, with 37 components from 8 distinct parts.

Its main chip is the CH32V003JXMX, from the RISC-V family. By type, the board carries 18 LEDs, 7 capacitors, 6 jumpers, 2 connectors, 2 test points and 1 IC.

It belongs with the displays & leds designs in this gallery.

From the project

Nekomimi LED for M5Atom

使用するGPIO端子は上記写真の赤枠のランドいずれかをはんだでショートすることにより選択できます BOOTH等で頒布するものは上記写真のように右側上から２番目の端子が既にショートされています その場合の利用するGPIOは下記となります |Atom種別|LED Data Out| |:--|:-:| |AtomS3/S3R/S3Lite/S3RCAM/S3REx/EchoS3R等S3系|G38| |AtomLite/AtomMatrix/AtomEcho等S3系以外|G25|

利用上の注意点： - ECHO BASEと併用する場合はI2Cで利用している端子をスピーカ、マイクの初期化後にI2Cでの利用を停止してから利用可能です - 利用するGPIOをまず出力、LOWレベルで初期化してください(行わないとLEDが意図した点灯とならない場合があります)  例： (GPIO38利用時)  (スピーカ、マイク等初期化処理)  Wire.end(); // ECHO BASE併用時にI2Cでの利用を終了  digitalWrite(GPIO38, LOW); // GPIOを出力、LOWレベルで初期化  (FastLED等LEDライブラリでの初期化)

Nekomimi led Atom, from the project README
From the project README

Main components on the Nekomimi led Atom

CH32V003JXMX

Nekomimi led Atom bill of materials (BOM)

37 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CH32V003JXMX
CH32V003JxMx
U1
1
PINHEADER_1X04_P2.54MM_VERTICAL
PinHeader_1x04_P2.54mm_Vertical
J1
1
PINHEADER_1X05_P2.54MM_VERTICAL
PinHeader_1x05_P2.54mm_Vertical
J2
6
JUMPER_2_OPEN
Jumper_2_Open
JP3, JP4, JP5, JP6, JP7, JP8
2
TestPoint_Alt
TP2, TP3
18
WS2812C-2020
XL-1010RGBC-WS2812B
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +10
7
0.1UF
0.1uF
C1, C2, C3, C4, C5, C6, C7
1
330
R1

Nekomimi led Atom design files

The KiCad project lives in the washishi/nekomimi_led_Atom repository on GitHub; these links point at the commit this page was built from.

Nekomimi led Atom: common questions

What microcontroller does the Nekomimi led Atom use?

The Nekomimi led Atom is built around the CH32V003JXMX, from the RISC-V family.

How big is the Nekomimi led Atom PCB?

The Nekomimi led Atom measures 22.2 × 29.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Nekomimi led Atom?

37 components, from 8 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Nekomimi led Atom design files?

From the washishi/nekomimi_led_Atom repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Nekomimi led Atom design in my own project?

Yes, under the terms of its MIT license, which washishi chose for the repository.

Can I test firmware for the Nekomimi led Atom without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RISC-V firmware against it before you order a PCB.

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