50 open source boards using the NE555
Real designs built with the NE555, 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/Arduino8bit computer
vascofazza
297.2 × 180.3 mm327 parts2LMIT314
Raemixx500
SukkoPera
365.8 × 254 mm349 parts2LNo license313
AVR/Arduino65C02 Computer
dbuchwald
203.2 × 149.9 mm62 parts2LMIT176
AVR/ArduinoPLC-14500
nicolacimmino
160.1 × 101 mm160 parts2LGPL-3.069
STM32USB-C-Screen-Adapter
Jana-Marie
40 × 20.8 mm60 parts4LGPL-3.068
Eda designs
kyllikki
237.5 × 171.5 mm148 parts2LMIT32
OpenAmigaJoyMouseSwitcher
66.8 × 73.5 mm29 parts2LCustom license26
C64-Joystick-Switcher
tebl
49.3 × 81.9 mm27 parts2LCERN-OHL-1.221
C64-Mega-Switcher
49.3 × 81.5 mm31 parts2LCERN-OHL-1.220
Drawdio
UC3Music
90.8 × 22.9 mm18 parts2LNo license15
Amiga Mouse Switch
82.6 × 40.6 mm23 parts2LCERN-OHL-1.211
AVR/ArduinoAT65C02 Hobby Computer
Kayto
241.3 × 149.9 mm161 parts2LCERN-OHL-1.27
Drone o tron 1 0Rev1
koNrand
161.8 × 100 mm99 parts2LNo license7
AVR/ArduinoMechBoard16
386.1 × 97 mm247 parts2LNo license6
Blinker-Fuild
CRG-Glen
35.3 × 83.5 mm147 parts4LCERN-OHL-P-2.05
APC
UEPro
90 × 43 mm24 parts2LNo license5
Nibble plusplus
Binary-Kitchen
40 × 40 mm19 parts2LCC-BY-SA-4.05
Pwmcontroller
mtreinish
35.1 × 44.5 mm17 parts2LCERN-OHL-1.25
ESP32Moskill
telagod
30 × 100 mm90 parts2LNo license2
DMX Demonstrator - Analog IO PWM (DMX-IO4)
SparkyBobo
60 × 60 mm24 parts2LGPL-3.02
Microscope led light circuit
CGrassin
40 × 21.1 mm17 parts2LCC-BY-4.02
Curso
xizuth
34.3 × 25.4 mm7 parts2LNo license2
Voice
minisystem
133.4 × 50 mm426 parts2LNo license1
Automatic led control system
amartya-singh
33 × 22.9 mm8 parts2LNo license1- schematic only · 24 partsAVR/Arduino
Perfboard studio
medinstech
24 partsApache-2.01 
LEC000043-Detecteur de presence-DCC-Analogique-3A
LECTIX
81.5 × 31.8 mm38 parts2LCERN-OHL-S-2.00
LEC000042-Detecteur de presence-DCC-Analogique-1A
75.4 × 31.8 mm36 parts2LCERN-OHL-S-2.00- schematic only · 5 parts
Schematic reconstruction
eehubio
5 partsNo license0 
AVR/ArduinoRC6502 Apple 1 SBC
99.1 × 99.7 mm48 parts2LGPL-3.0192
Clock module
101.6 × 78.7 mm40 parts2LMIT176
USB-C-Screen-Adapter-LDR6023SS
31 × 34.4 mm40 parts2LGPL-3.068
Drone o tron 1 0Rev1 rounded edges
161.8 × 100 mm99 parts2LNo license7
ESP8266Environment Controller KiCad THT
ArtoLabs
96 × 73 mm45 parts2LMIT3
SMT-Theremin v2
KnoxMakers
81.3 × 50.8 mm42 parts2LNo license3
Led chaser SMD
tmjnijssen
24 × 35 mm25 parts2LCERN-OHL-P-2.03
ESP32Moskill backup
30 × 100 mm90 parts2LNo license2
The NE555 in open source designs
The gallery holds 50 open source boards using the NE555 from 39 GitHub repositories; a typical one measures about 74.9 × 73.3 mm and carries around 39 components.
96% are two-layer designs, the rest use four layers or more, and 56% carry an open source license.
The most starred is 8bit computer by vascofazza.
Parts used alongside the NE555
Microcontrollers on boards using the NE555
What boards using the NE555 are built for
NE555: common questions
Where can I find a NE555 reference design?
Each of the 50 boards on this page is a real design using the NE555. 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 NE555?
The 74LS04, 74LS08, 74LS157, 74LS32 and 28C256 appear in the most repositories here.
Which microcontrollers do boards using the NE555 use?
Most are built on AVR/Arduino (12), ESP32 (4), ESP8266 (1) and STM32 (1).
How big is a typical board using the NE555?
The median is 74.9 × 73.3 mm, and 96% are two-layer designs.
What is the most popular open source board using the NE555?
By GitHub stars, 8bit computer by vascofazza, with 314 stars.
Can I simulate one of these boards using the NE555 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.