3 open source boards using the TCAL9538
Real designs built with the TCAL9538, 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.
STM32BAGEL Switch MK1.1
ISSUIUC
70 × 70 mm201 parts4LNo license31
STM32BAGEL Switch MK1
70 × 70 mm189 parts4LNo license31
ESP32MIDAS Mini MK1
25 × 80 mm122 parts4LNo license31
The TCAL9538 in open source designs
The gallery holds 3 open source boards using the TCAL9538 from 1 GitHub repository; a typical one measures about 69.9 × 70 mm and carries around 189 components.
100% use four copper layers or more, and 0% carry an open source license.
The most starred is BAGEL Switch MK1.1 by ISSUIUC.
What boards using the TCAL9538 are built for
TCAL9538: common questions
Where can I find a TCAL9538 reference design?
Each of the 3 boards on this page is a real design using the TCAL9538. 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 TCAL9538 use?
Most are built on STM32 (2) and ESP32 (1).
How big is a typical board using the TCAL9538?
The median is 69.9 × 70 mm, and 0% are two-layer designs.
What is the most popular open source board using the TCAL9538?
By GitHub stars, BAGEL Switch MK1.1 by ISSUIUC, with 31 stars.
Can I simulate one of these boards using the TCAL9538 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.