27 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
Input selector
FutureSharks
90.2 × 52.1 mm41 parts2LGPL-3.045
AVR/ArduinoMyGenWashy
mayermakes
147.8 × 106.3 mm54 parts2LGPL-3.011
Keithley1950
openscopeproject
60 × 80 mm83 parts2LCERN-OHL-1.29
Temp
ka6s
170.2 × 135.1 mm146 parts4LCustom license7
STM32Timer-RTC-STM32-Tm1638
nhantt92
93 × 61 mm125 parts2LNo license6
AVR/ArduinoNicoEFI-ECU-Speeduino mega2561
NicoEFI
85 × 100 mm135 parts2LNo license5
BluePill-Monster-Arcade-Board withbuttons
steelpuxnastik
91.7 × 65.8 mm18 parts2LNo license4
LPF Board HF-6m Forte600
SP6GK
250 × 160 mm129 parts2LGPL-3.02
DP1600i
Hocus-Pocus
120.4 × 100.1 mm121 parts2LNo license1
ESP32Reverb
DynamicWhiteHat
82.6 × 74.3 mm102 parts2LNo license1
AVR/ArduinoShield-B
rsedak
69.1 × 53.9 mm44 parts2LCustom license1
Breakout
akashihi
100 × 100 mm43 parts4LNo license1
NucleoExpansion
JiriS97
156.2 × 143.5 mm41 parts2LMIT1
Led matrix-5x4
paliichukvladyslav
96.5 × 96.5 mm30 parts2LWTFPL1
NXPMotor controller
100 × 40 mm63 parts4LMIT51
AVR/ArduinoCamera stabilization hardware
rmingon
36 × 32 mm18 parts2LNo license10
Control Board
stormbots
120.7 × 77.5 mm52 parts2LNo license3
AVR/ArduinoProgrammableRelayModule4Channel
numato
91 × 82 mm72 parts2LNo license143
AVR/ArduinoProgrammableRelayModule2Channel
100 × 60 mm64 parts2LNo license143
BluePill-Monster-Arcade-Board withoutbuttons
76.4 × 69.3 mm14 parts2LNo license4
AVR/ArduinoXDuinoRail-Protoboard
chatelao
100 × 100 mm42 parts2LAGPL-3.00
Solenoid driver
BASLQC
45.3 × 21.3 mm21 parts2LGPL-3.024
AVR/ArduinoXDuinoRailSwitch
59.1 × 50.6 mm31 parts2LAGPL-3.00
AVR/Arduino0.4
speeduino
100 × 100 mm127 parts2LNo license281
EzSignal
bask185
45 × 97.5 mm48 parts2LNo license3
The ULN2003 in open source designs
The gallery holds 27 open source boards using the ULN2003 from 23 GitHub repositories; a typical one measures about 96.5 × 80 mm and carries around 54 components.
85% are two-layer designs, the rest use four layers or more, and 41% carry an open source license.
The most starred is 0.4 by speeduino.
Parts used alongside the ULN2003
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 27 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.
What parts are used alongside the ULN2003?
The Arduino_UNO_R3, LM358, MPX4250AP, NCV7805BTG and SP721APP appear in the most repositories here.
Which microcontrollers do boards using the ULN2003 use?
Most are built on AVR/Arduino (10), ESP32 (1), NXP (1) and Raspberry Pi (1).
How big is a typical board using the ULN2003?
The median is 96.5 × 80 mm, and 85% 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.