9 open source boards using the 4504
Real designs built with the 4504, 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.
RP2040/RP2350Useq1
Emute-Lab-Instruments
40.6 × 108 mm163 parts2LNo license45
C6021light
GBert
100 × 50 mm74 parts2LNo license36
STM32Sensored-3-P-BLDC-Closed-Loop-V1
g-rahul
100 × 100 mm114 parts2LNo license5
PICAll in One Railroad Interface
85 × 56.5 mm151 parts2LNo license99
PICBPi-CAN
100 × 100 mm146 parts2LNo license99
Useq
40.6 × 108 mm29 parts2LNo license45
S88iso
70 × 50 mm29 parts2LNo license36
C8051-test
48.3 × 54.6 mm13 parts2LNo license36
Relay ctrl compressor cabinet
ograsdijk
81.9 × 52.1 mm17 parts2LNo license1
The 4504 in open source designs
The gallery holds 9 open source boards using the 4504 from 5 GitHub repositories; a typical one measures about 81.9 × 56.5 mm and carries around 74 components.
100% are two-layer designs, the rest use four layers or more, and 0% carry an open source license.
The most starred is All in One Railroad Interface by GBert.
Microcontrollers on boards using the 4504
What boards using the 4504 are built for
4504: common questions
Where can I find a 4504 reference design?
Each of the 9 boards on this page is a real design using the 4504. 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 4504 use?
Most are built on PIC (2), RP2040/RP2350 (1) and STM32 (1).
How big is a typical board using the 4504?
The median is 81.9 × 56.5 mm, and 100% are two-layer designs.
What is the most popular open source board using the 4504?
By GitHub stars, All in One Railroad Interface by GBert, with 99 stars.
Can I simulate one of these boards using the 4504 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.