2 layers75 × 50 mm Io board, the printed circuit board in 3D

Io board

IchigoJam(R) simulator

Size: 75 × 50 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 29
Nets: 39
Pads: 135
Tracks, vias: 297, 86
Pours: 4
Routed: Yes
KiCad: KiCad 7 (file 20221018)
Created: 13 Jun 2019
Updated: 8 Sep 2024

Overview

Io board is an open-source printed circuit board by mikecat, from the mikecat/OneFiveCrowd repository on GitHub. It is a 2-layer board of 75 × 50 mm with 29 parts on 39 nets, routed with 297 tracks and 86 vias.

It is built around the NJM2845DL1-33-TE1. Its parts include 6 resistors, 6 connectors, 4 capacitors, 3 ICs and 2 switches.

Main components

NJM2845DL1-33-TE1
TO-252-40℃~+85℃@(Ta) 1 14V 180mV@(500mA) 3.3V 400uA 45uVrms 75dB@(1kHz) 800mA Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive TO-252 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSNisshinbo Micro Devices Inc.Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

README

boards/io_board/README.md

I/O Board for OneFiveCrowd

MCP2221とI/Oエキスパンダを用い、USB経由でのI/Oを実現します。

ハードウェアの制約により、以下の制約があります。

5Vトレラントではありません。
PWMは非対応です。
BTN・IN2・IN3以外のADCは非対応です。
IN2・IN3のプルアップは非対応です。
DACでは1種類の値しか出力できません。

IchigoJam T ガーバーデータ (CC BY aitendo & jig.jp) を参照し、互換性のある端子および穴の配置としています。

さらに、I2C用のGROVEコネクタおよび Digilent Pmod™ Interface Specification を参考にしたコネクタも用意しています。

リソース

パーツリスト

リファレンス	種類	値
U1	IC	USBブリッジ MCP2221A-I/SL (SOIC 1.27mmピッチ)
U2	IC	I/Oエキスパンダ MCP23008-E/SO (SOIC 1.27mmピッチ)
U3	IC	3端子レギュレータ 3.3V NJM2845DL1-33
R1、R2	抵抗	5.1kΩ 1/4Wサイズ (長さ6.3mm)
R3	抵抗	1MΩ 1/4Wサイズ (長さ6.3mm)
R4	抵抗	LED用 (抵抗値はお好みで) 1/4Wサイズ (長さ6.3mm)
R5、R6	抵抗	10kΩ 1/4Wサイズ (長さ6.3mm)
C1	コンデンサ	0.33μF 5mmピッチ
C2	コンデンサ	2.2μF 5mmピッチ
C3、C4	コンデンサ	0.1μF 2.54mmピッチ
D1	LED	お好みで (砲弾型Φ5mm推奨)
SW1	スイッチ	タクトスイッチ 6mm DTS-6 (TS-0606) シリーズ
SW2	スイッチ	スライドスイッチ 2.54mmピッチ 1回路2接点 (SS-12D00G3 など)
J1	USBコネクタ	秋月 K-15426 / K-13080
J2、J3	ピンソケット	2.54mmピッチ 1×14
J4	ピンソケット	2.54mmピッチ 1×5
J5	ピンソケット	2.54mmピッチ L型 1×6
J6	コネクタ	GROVE 4ピンコネクタ垂直タイプ

Parts

Qty	Value	Footprint	References
4	MountingHole	MountingHole:MountingHole_3.2mm_M3	H1, H2, H3, H4
3	SolderJumper_3_Bridged12	Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels	JP1, JP2, JP3
2	0.1u	Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm	C3, C4
2	10k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R5, R6
2	5.1k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1, R2
2	Conn_01x14	Connector_PinSocket_2.54mm:PinSocket_1x14_P2.54mm_Vertical	J2, J3
1	0.33u	Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm	C1
1	1M	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R3
1	2.2u	Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm	C2
1	Conn_01x04	Connector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical	J6
1	Conn_01x05	Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical	J4
1	Conn_01x06	Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical	J5
1	LED	LED_THT:LED_D5.0mm	D1
1	MCP2221AxSL	Package_SO:SOIC-14_3.9x8.7mm_P1.27mm	U1
1	MCP23008-xSO	Package_SO:SOIC-18W_7.5x11.6mm_P1.27mm	U2
1	NJM2845DL1-33	Package_TO_SOT_SMD:TO-252-2	U3
1	R_LED	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R4
1	SW_Push	Button_Switch_THT:SW_PUSH_6mm_H5mm	SW1
1	SW_SPDT	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	SW2
1	~	library:AE-USB2.0-TYPE-C	J1

Questions

How big is the Io board PCB?

It measures 75 × 50 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Io board use?

29 parts, built around the NJM2845DL1-33-TE1. 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 Io board KiCad files?

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

Can I use the Io board design in my own project?

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

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/mikecat-onefivecrowd" title="Io board 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/mikecat-onefivecrowd.jpg" alt="Io board" width="1200" height="900">

A picture that opens the board, for a README

[![Io board](https://pcbkit.io/embed/boards/mikecat-onefivecrowd.jpg?size=s)](https://pcbkit.io/boards/mikecat-onefivecrowd)

Source

Repository: mikecat/OneFiveCrowd
Board file: boards/io_board/io_board.kicad_pcb
Commit: 37d5ab4
Licence: Not stated

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