9 open source boards using the ULN2003
Real designs built with the ULN2003, 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.
AVR/ArduinoMPCNC-Nano-Estlcam-Shield
tnn85
160 × 100 mm92 parts2LCustom license70
Raspberry PiExpansion board
reubenstr
100 × 49.8 mm75 parts4LMIT51
AVR/ArduinoMyGenWashy
mayermakes
147.8 × 106.3 mm54 parts2LGPL-3.011
LPF Board HF-6m Forte600
SP6GK
250 × 160 mm129 parts2LGPL-3.02
ESP32Reverb
DynamicWhiteHat
82.6 × 74.3 mm102 parts2LNo license1
NXPMotor controller
100 × 40 mm63 parts4LMIT51
AVR/ArduinoXDuinoRail-Protoboard
chatelao
100 × 100 mm42 parts2LAGPL-3.00
AVR/ArduinoXDuinoRailSwitch
59.1 × 50.6 mm31 parts2LAGPL-3.00
AVR/Arduino0.4
speeduino
100 × 100 mm127 parts2LNo license281
The ULN2003 in open source designs
The gallery holds 9 open source boards using the ULN2003 from 7 GitHub repositories; a typical one measures about 100 × 100 mm and carries around 75 components.
78% are two-layer designs, the rest use four layers or more, and 67% carry an open source license.
The most starred is 0.4 by speeduino.
Microcontrollers on boards using the ULN2003
What boards using the ULN2003 are built for
ULN2003: common questions
Where can I find a ULN2003 reference design?
Each of the 9 boards on this page is a real design using the ULN2003. 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 ULN2003 use?
Most are built on AVR/Arduino (5), ESP32 (1), NXP (1) and Raspberry Pi (1).
How big is a typical board using the ULN2003?
The median is 100 × 100 mm, and 78% are two-layer designs.
What is the most popular open source board using the ULN2003?
By GitHub stars, 0.4 by speeduino, with 281 stars.
Can I simulate one of these boards using the ULN2003 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.