4 open source boards using the TCA9555RTWR
Real designs built with the TCA9555RTWR, 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.
Macropad
bytesizedengineering
100 × 116 mm111 parts2LNo license7
RP2040/RP2350Mp3-player
espcaa
52 × 115.8 mm141 parts4LCustom license5
ESP32Controller
sudo-junkie
127.9 × 33.6 mm101 parts4LNo license1
20-key macropad
hossainmahmudchowdhury-boop
100 × 116 mm111 parts2LNo license0
The TCA9555RTWR in open source designs
The gallery holds 4 open source boards using the TCA9555RTWR from 4 GitHub repositories; a typical one measures about 100 × 115.9 mm and carries around 111 components.
50% are two-layer designs, the rest use four layers or more, and 0% carry an open source license.
The most starred is Macropad by bytesizedengineering.
Parts used alongside the TCA9555RTWR
Microcontrollers on boards using the TCA9555RTWR
What boards using the TCA9555RTWR are built for
TCA9555RTWR: common questions
Where can I find a TCA9555RTWR reference design?
Each of the 4 boards on this page is a real design using the TCA9555RTWR. 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 TCA9555RTWR use?
Most are built on ESP32 (1) and RP2040/RP2350 (1).
How big is a typical board using the TCA9555RTWR?
The median is 100 × 115.9 mm, and 50% are two-layer designs.
What is the most popular open source board using the TCA9555RTWR?
By GitHub stars, Macropad by bytesizedengineering, with 7 stars.
Can I simulate one of these boards using the TCA9555RTWR 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.