16 open source boards using the 74HC02
Real designs built with the 74HC02, 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.
D50mram
dojoe
86 × 54 mm41 parts2LNo license74
ESP8266Stargate
leomanes
335 × 218.6 mm274 parts2LGPL-3.017
Polygonus-Universal-112
FOME-Tech
160 × 121 mm120 parts4LNo license4
ESP32TSAL G V4 2
HKUST-Red-Bird-Racing-EVRT
140 × 60 mm117 parts2LNo license3
Internal sdcard interface
ifilot
219 × 88 mm77 parts2LNo license3
AVR/ArduinoEmuprom
agkaminski
88.3 × 68.6 mm34 parts2LCC0-1.03
FellaPC
284.9 × 96.5 mm107 parts2LCC0-1.02
BMS
Wierdwizard2587
179 × 44 mm64 parts2LNo license1
RP2040/RP2350XDuinoRail-Debug
chatelao
99.1 × 99 mm147 parts2LAGPL-3.00
Zak180
188 × 128.3 mm128 parts4LCC-BY-NC-4.00
Philips P2000T SD-CARD SLOT2 cartridge
85.1 × 100 mm62 parts4LNo license3
AVR/ArduinoXDuinoRail-RailComShield
48.1 × 53 mm59 parts2LAGPL-3.00
004.601.00
stonedDiscord
147.3 × 94 mm79 parts2LBSD-2-Clause4
XDuinoRail-Breakout-RailcomDetect
49.5 × 49.5 mm47 parts2LAGPL-3.00
Control
89Mods
209.6 × 108.5 mm81 parts4LMIT2
Memory
209.6 × 108.5 mm58 parts4LMIT2
The 74HC02 in open source designs
The gallery holds 16 open source boards using the 74HC02 from 12 GitHub repositories; a typical one measures about 153.7 × 95.3 mm and carries around 78 components.
69% are two-layer designs, the rest use four layers or more, and 56% carry an open source license.
The most starred is D50mram by dojoe.
Parts used alongside the 74HC02
Microcontrollers on boards using the 74HC02
What boards using the 74HC02 are built for
74HC02: common questions
Where can I find a 74HC02 reference design?
Each of the 16 boards on this page is a real design using the 74HC02. 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 74HC02?
The 74HC32, 74HC00, 74HC138, 74HC74 and AMS1117-3.3 appear in the most repositories here.
Which microcontrollers do boards using the 74HC02 use?
Most are built on AVR/Arduino (2), ESP32 (1), ESP8266 (1) and RP2040/RP2350 (1).
How big is a typical board using the 74HC02?
The median is 153.7 × 95.3 mm, and 69% are two-layer designs.
What is the most popular open source board using the 74HC02?
By GitHub stars, D50mram by dojoe, with 74 stars.
Can I simulate one of these boards using the 74HC02 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.