5 open source boards using the PCF8574AT
Real designs built with the PCF8574AT, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
Arnav hackpad
arnavshah100
90.3 × 79.8 mm25 parts2LMIT1- schematic only · 38 parts
Epicura spec
manasXP
38 partsNo license1 
AVR/ArduinoMini-Power-Gauge
oct-karim
92.1 × 99.4 mm54 parts2LNo license0
ScreenHat
antek-elektronik
157 × 63.5 mm49 parts2LNo license0
ESP32WK-1
zOnlyKroks
49.9 × 99.8 mm89 parts4LCC0-1.00
The PCF8574AT in open source designs
The gallery holds 5 open source boards using the PCF8574AT from 5 GitHub repositories; a typical one measures about 91.2 × 89.6 mm and carries around 49 components.
75% are two-layer designs, the rest use four layers or more, and 40% carry an open source license.
The most starred is Epicura spec by manasXP.
Microcontrollers on boards using the PCF8574AT
What boards using the PCF8574AT are built for
PCF8574AT: common questions
Where can I find a PCF8574AT reference design?
Each of the 5 boards on this page is a real design using the PCF8574AT. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
Which microcontrollers do boards using the PCF8574AT use?
Most are built on AVR/Arduino (1) and ESP32 (1).
How big is a typical board using the PCF8574AT?
The median is 91.2 × 89.6 mm, and 75% are two-layer designs.
What is the most popular open source board using the PCF8574AT?
By GitHub stars, Epicura spec by manasXP, with 1 stars.
Can I simulate one of these boards using the PCF8574AT before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.