2 layers69 × 36 mm PCF8574-expansion, the printed circuit board in 3D

PCF8574-expansion

I2C expansion board for the ModularControlPanel

Size: 69 × 36 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 23
Nets: 22
Pads: 72
Tracks, vias: 150, 8
Pours: 2
Routed: Yes
KiCad: KiCad 7 (file 20221018)
Created: 12 Nov 2023
Updated: 12 Nov 2023

Overview

PCF8574-expansion is an open-source printed circuit board by TheBlueManCoding, from the TheBlueManCoding/PCF8574-expansion repository on GitHub. It is a 2-layer board of 69 × 36 mm with 23 parts on 22 nets, routed with 150 tracks and 8 vias.

It is built around the PCF8574T. Its parts include 8 connectors, 5 resistors, 1 capacitor, 1 IC and 1 diode.

Main components

PCF8574T
SOP-16-300mil-40℃~+85℃ 100kHz 10uA 2.5V~6V 25mA 300uA 8 8 Cascading and address extension、Built-in LED driver I2C Interrupt Output Open-drain SOP-16-300mil I/O Expanders ROHSHGSEMII/O Expanders

README

README.md

PCF8574-expansion

I2C expansion board for the ModularControlPanel

Parts

Qty	Value	Footprint	References
5	10K	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1, R2, R3, R4, R5
4	MountingHole_Pad	MountingHole:MountingHole_4.3mm_M4_DIN965_Pad	H1, H2, H3, H4
2	I2C	Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical	J1, J7
2	Power	Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical	J6, J8
1	A0	Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm	JP1
1	A1	Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm	JP2
1	A2	Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm	JP3
1	C	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1
1	LED_1	Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical	J2
1	LED_2	Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical	J3
1	LED_3	Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical	J4
1	LED_4	Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical	J5
1	PCF8574	Library:SO-16_7,7x10.2mm_P1.27mm-PCF8574	U1
1	~	Library:OP714A04	D1

Questions

How big is the PCF8574-expansion PCB?

It measures 69 × 36 mm and has 2 copper layers, 1.6 mm thick.

What parts does the PCF8574-expansion use?

23 parts, built around the PCF8574T. 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 PCF8574-expansion KiCad files?

From the TheBlueManCoding/PCF8574-expansion repository on GitHub, at the commit this page was made from: the board is PCF8574-expansion.kicad_pcb and its schematic PCF8574-expansion.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the PCF8574-expansion design in my own project?

Its repository states no licence, so its author keeps all rights: ask TheBlueManCoding 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/thebluemancoding-pcf8574-expansion" title="PCF8574-expansion 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/thebluemancoding-pcf8574-expansion.jpg" alt="PCF8574-expansion" width="1200" height="900">

A picture that opens the board, for a README

[![PCF8574-expansion](https://pcbkit.io/embed/boards/thebluemancoding-pcf8574-expansion.jpg?size=s)](https://pcbkit.io/boards/thebluemancoding-pcf8574-expansion)

Source

Repository: TheBlueManCoding/PCF8574-expansion
Board file: PCF8574-expansion.kicad_pcb
Commit: 0d67f77
Licence: Not stated

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