11 open source boards using the 5V
Real designs built with the 5V, 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/RP2350HydraMeter 0.4
jduffy105
76.2 × 114.3 mm288 parts2LCERN-OHL-S-2.0174
ESP32GyroCube
Pedro-51
73.5 × 52.1 mm23 parts2LNo license7- schematic only · 69 partsAVR/Arduino
Thotcon0x5
Workshop88
69 partsNo license7 
Main Board
callmestiles
137.2 × 151.2 mm86 parts2LNo license2
AVR/ArduinoGrinder timer
Clewsy
75 × 120 mm31 parts2LMIT1
Hw micropow
aw
44 × 22 mm12 parts2LCC-BY-SA-4.01
AVR/ArduinoIndicator board 3V3 & 5V
100 × 73.3 mm83 parts2LNo license2
ESP32BoneIO - dimmer board 4x4A
boneIO-eu
67.8 × 86.9 mm106 parts2LGPL-3.02
RP2040/RP2350Output controller
mekatrol
238 × 122 mm161 parts2LNo license0
BoneIO - expansion module
86 × 74 mm74 parts2LGPL-3.02
RP2040/RP2350Controller
140 × 100 mm146 parts2LNo license0
The 5V in open source designs
The gallery holds 11 open source boards using the 5V from 8 GitHub repositories; a typical one measures about 81.1 × 93.5 mm and carries around 83 components.
100% are two-layer designs, the rest use four layers or more, and 45% carry an open source license.
The most starred is HydraMeter 0.4 by jduffy105.
Parts used alongside the 5V
Microcontrollers on boards using the 5V
What boards using the 5V are built for
5V: common questions
Where can I find a 5V reference design?
Each of the 11 boards on this page is a real design using the 5V. 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 5V use?
Most are built on AVR/Arduino (3), RP2040/RP2350 (3) and ESP32 (2).
How big is a typical board using the 5V?
The median is 81.1 × 93.5 mm, and 100% are two-layer designs.
What is the most popular open source board using the 5V?
By GitHub stars, HydraMeter 0.4 by jduffy105, with 174 stars.
Can I simulate one of these boards using the 5V 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.