4 open source boards using the LM3940IMPX-3.3_NOPB
Real designs built with the LM3940IMPX-3.3_NOPB, 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.
STM32Stm32pe midi
udu3324
307 × 46.1 mm135 parts4LGPL-3.035
ESP32Slider synth
94.6 × 25 mm49 parts2LGPL-3.07
ESP32 IEM RX
dlmuschamp
90.5 × 55.3 mm63 parts2LNo license2
ESP32U-WROOM Wireless IEM Transmitter
90.5 × 55.3 mm43 parts2LNo license2
The LM3940IMPX-3.3_NOPB in open source designs
The gallery holds 4 open source boards using the LM3940IMPX-3.3_NOPB from 3 GitHub repositories; a typical one measures about 92.5 × 50.6 mm and carries around 56 components.
75% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.
The most starred is Stm32pe midi by udu3324.
What boards using the LM3940IMPX-3.3_NOPB are built for
LM3940IMPX-3.3_NOPB: common questions
Where can I find a LM3940IMPX-3.3_NOPB reference design?
Each of the 4 boards on this page is a real design using the LM3940IMPX-3.3_NOPB. 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 LM3940IMPX-3.3_NOPB use?
Most are built on ESP32 (1) and STM32 (1).
How big is a typical board using the LM3940IMPX-3.3_NOPB?
The median is 92.5 × 50.6 mm, and 75% are two-layer designs.
What is the most popular open source board using the LM3940IMPX-3.3_NOPB?
By GitHub stars, Stm32pe midi by udu3324, with 35 stars.
Can I simulate one of these boards using the LM3940IMPX-3.3_NOPB 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.