4 open source boards using the MCP23017T-E/SS
Real designs built with the MCP23017T-E/SS, 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.
IO-expander-MCP23017-breakout hardware design
SolderedElectronics
22 × 38 mm29 parts2LTAPR-OHL-1.04
AVR/ArduinoEUPLA CONE CORE
PineConeMechatronics
76.2 × 54 mm95 parts2LCERN-OHL-P-2.01
ESP32ESP 24V 16xIn/16xOut/1-Wire Module
thermseekr
108 × 67.8 mm318 parts4LCC-BY-NC-4.06
Virgil Backplane
da-penguin-guy
212 × 46 mm36 parts4LNo license1
The MCP23017T-E/SS in open source designs
The gallery holds 4 open source boards using the MCP23017T-E/SS from 4 GitHub repositories; a typical one measures about 92.1 × 50 mm and carries around 66 components.
50% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.
The most starred is ESP 24V 16xIn/16xOut/1-Wire Module by thermseekr.
Microcontrollers on boards using the MCP23017T-E/SS
What boards using the MCP23017T-E/SS are built for
MCP23017T-E/SS: common questions
Where can I find a MCP23017T-E/SS reference design?
Each of the 4 boards on this page is a real design using the MCP23017T-E/SS. 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 MCP23017T-E/SS use?
Most are built on AVR/Arduino (1) and ESP32 (1).
How big is a typical board using the MCP23017T-E/SS?
The median is 92.1 × 50 mm, and 50% are two-layer designs.
What is the most popular open source board using the MCP23017T-E/SS?
By GitHub stars, ESP 24V 16xIn/16xOut/1-Wire Module by thermseekr, with 6 stars.
Can I simulate one of these boards using the MCP23017T-E/SS 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.