3 open source boards using the ULN2803ADWR

Real designs built with the ULN2803ADWR, 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.

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The ULN2803ADWR in open source designs

The gallery holds 3 open source boards using the ULN2803ADWR from 3 GitHub repositories; a typical one measures about 100 × 68.5 mm and carries around 119 components.

67% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.

The most starred is Bob by rene-dev.

Microcontrollers on boards using the ULN2803ADWR

ESP32 1

What boards using the ULN2803ADWR are built for

ULN2803ADWR: common questions

Where can I find a ULN2803ADWR reference design?

Each of the 3 boards on this page is a real design using the ULN2803ADWR. 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 ULN2803ADWR use?

Most are built on ESP32 (1).

How big is a typical board using the ULN2803ADWR?

The median is 100 × 68.5 mm, and 67% are two-layer designs.

What is the most popular open source board using the ULN2803ADWR?

By GitHub stars, Bob by rene-dev, with 979 stars.

Can I simulate one of these boards using the ULN2803ADWR 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.