57 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.
Minimal-64x4-Home-Computer
slu4coder
245.1 × 160 mm134 parts2LNo license323
8-Bit CPU 32k
196.9 × 125.1 mm101 parts2LNo license184
AVR/Arduino65C02 Computer
dbuchwald
203.2 × 149.9 mm62 parts2LMIT176
D50mram
dojoe
86 × 54 mm41 parts2LNo license74- schematic only · 56 parts
Intel8088OnBreadboard
sladorsoft
56 partsNo license41 
8 16 computer 2
halfburnttoast
208 × 110 mm111 parts2LNo license21
New enet
jayacotton
254 × 134.6 mm36 parts2LMIT21
ESP8266Stargate
leomanes
335 × 218.6 mm274 parts2LGPL-3.017
AVR/Arduino6502 ACE Board
acwright
335 × 250 mm183 parts2LCERN-OHL-P-2.012
AVR/ArduinoAT65C02 Hobby Computer
Kayto
241.3 × 149.9 mm161 parts2LCERN-OHL-1.27
ByteFrost
gilkeidar
215 × 140 mm36 parts2LNo license5
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
Latest-Full-Backplane
Trilobyte-CPU
100 × 100 mm146 parts4LNo license2
FellaPC
284.9 × 96.5 mm107 parts2LCC0-1.02
Clock
101.6 × 55.9 mm72 parts2LCERN-OHL-S-2.02
BF-010
botanicfields
99.1 × 94 mm54 parts2LCC0-1.02
Cisc-8
nailed-barnacle
299.7 × 198.1 mm315 parts2LMIT1
Estop driver
OUXT-Polaris
160 × 160 mm157 parts2LMIT1
K PA Protec
F6ITU
102.5 × 75 mm83 parts2LNo license1
Main Board
juniperlynx
212 × 126 mm75 parts2LNo license1
BMS
Wierdwizard2587
179 × 44 mm64 parts2LNo license1- schematic only · 112 parts
MSAP-1
mehrantsi
112 partsMIT1 
Micro
jurendono
200 × 150 mm175 parts2LNo license0
RP2040/RP2350XDuinoRail-Debug
chatelao
99.1 × 99 mm147 parts2LAGPL-3.00
Zak180
188 × 128.3 mm128 parts4LCC-BY-NC-4.00- schematic only · 34 parts
S100 enet
34 parts2LMIT21 
Philips P2000T SD-CARD SLOT2 cartridge
85.1 × 100 mm62 parts4LNo license3
74 Character Generator
rjhelms
124.5 × 99.1 mm77 parts4LNo license2
AVR/ArduinoVga
129.5 × 74.2 mm36 parts2LNo license1
HW
AvalonSemiconductors
54.9 × 75.8 mm64 parts4LApache-2.00
AVR/ArduinoXDuinoRail-RailComShield
48.1 × 53 mm59 parts2LAGPL-3.00
NXPInteractive Core Memory Badge (Logic) v0.3
ageppert
85 × 170 mm114 parts2LGPL-3.016
Tinyboard blinkenlight
43.2 × 63.5 mm14 parts2LGPL-3.05
The 74HC02 in open source designs
The gallery holds 57 open source boards using the 74HC02 from 41 GitHub repositories; a typical one measures about 143.7 × 97.8 mm and carries around 62 components.
78% are two-layer designs, the rest use four layers or more, and 47% carry an open source license.
The most starred is Minimal-64x4-Home-Computer by slu4coder.
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 57 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 74HC00, 74HC08, 74HC32, 74HC245 and 74HC138 appear in the most repositories here.
Which microcontrollers do boards using the 74HC02 use?
Most are built on AVR/Arduino (6), ESP32 (1), ESP8266 (1) and NXP (1).
How big is a typical board using the 74HC02?
The median is 143.7 × 97.8 mm, and 78% are two-layer designs.
What is the most popular open source board using the 74HC02?
By GitHub stars, Minimal-64x4-Home-Computer by slu4coder, with 323 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.