8 open source boards using the 74HC4050
Real designs built with the 74HC4050, 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/ArduinoZ80Atmega128
46nori
170 × 130 mm105 parts4LGPL-3.09
CNCHat
kajusK
85 × 56 mm98 parts2LNo license8
RP2040/RP2350AS3397 eurorack 0603
PhysicsDptAngers
92.2 × 64.2 mm110 parts2LMIT87
AVR/ArduinoProgrammableRelayModule4Channel
numato
91 × 82 mm72 parts2LNo license143
Adafruit RA8875 TFT Breakout
lagunter145
48.3 × 40.6 mm47 parts2LNo license2
AVR/ArduinoProgrammableRelayModule2Channel
100 × 60 mm64 parts2LNo license143
RP2040/RP2350AS3397 proto SMS
70.5 × 100.2 mm105 parts2LMIT87
Compe6502 SD Breakout
rjhelms
50.8 × 31.8 mm9 parts2LNo license2
The 74HC4050 in open source designs
The gallery holds 8 open source boards using the 74HC4050 from 6 GitHub repositories; a typical one measures about 88 × 62.1 mm and carries around 85 components.
88% are two-layer designs, the rest use four layers or more, and 38% carry an open source license.
The most starred is ProgrammableRelayModule4Channel by numato.
Microcontrollers on boards using the 74HC4050
What boards using the 74HC4050 are built for
74HC4050: common questions
Where can I find a 74HC4050 reference design?
Each of the 8 boards on this page is a real design using the 74HC4050. 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 74HC4050 use?
Most are built on AVR/Arduino (3) and RP2040/RP2350 (2).
How big is a typical board using the 74HC4050?
The median is 88 × 62.1 mm, and 88% are two-layer designs.
What is the most popular open source board using the 74HC4050?
By GitHub stars, ProgrammableRelayModule4Channel by numato, with 143 stars.
Can I simulate one of these boards using the 74HC4050 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.