46 open source boards using the LM393
Real designs built with the LM393, 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.
Sk162-herd mixer
mirdej
104.3 × 106.8 mm223 parts4LNo license47
Bluetooth minidisc
17o2
72.4 × 44.5 mm71 parts4LNo license43
C6021light
GBert
100 × 50 mm74 parts2LNo license36
Dragon64
danwerner21
333.2 × 205.9 mm220 parts2LNo license34
NXPPrecharge
LSUTigerRacing
133 × 98 mm113 parts2LNo license7
Air quality sensor-MQ135-breakout hardware design
SolderedElectronics
22 × 38 mm12 parts2LTAPR-OHL-1.07- schematic only · 71 parts
G3-Personality-Card-USB
croissantking
71 partsCC0-1.07 
FreeDSP-CLASSIC-SMD-B
freeDSP
67.3 × 92.3 mm170 parts2LCC-BY-SA-4.05
CO-sensor-MQ7-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.05
AVR/ArduinoRTB C02
git4dcc
75.7 × 36.8 mm81 parts4LApache-2.04
ESP32TSAL G V4 2
HKUST-Red-Bird-Racing-EVRT
140 × 60 mm117 parts2LNo license3
AVR/ArduinoRPM-counter
midasgossye
68.9 × 23 mm62 parts2LNo license3
Ozone sensor-MQ131-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.03
Ogham merged v1.0
keeos-io
50 × 110 mm108 parts2LCustom license2
Photomarker
SheinbergLab
50 × 34 mm22 parts2LMIT2
STM32Robotont electronics mainboard
robotont
304.3 × 274 mm407 parts2LNo license1
RP2040/RP2350Line 2026 v1
Gamu2124
196 × 158 mm272 parts2LNo license1
ESP32Smart light socket for fire prevention
JhanqueliX
68.1 × 75 mm113 parts4LNo license1
BMS
Wierdwizard2587
179 × 44 mm64 parts2LNo license1
CO--flammable gasses sensor-MQ9-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.01
Butane--LPG---Smoke sensor-MQ2-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.01
Ammonia sensor-MQ137-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.01
AVR/ArduinoEntropy32-Recorder
captainchapster
36 × 47 mm10 parts2LMIT1
RP2040/RP2350Line 2026 v1
196 × 158 mm272 parts2LNo license0
AVR/ArduinoAtinverter
bcarrillo1051
83.8 × 94.6 mm115 parts2LMIT0
RP2040/RP2350JamRF
Arcioth
120 × 90 mm61 parts4LCERN-OHL-P-2.00
Power-Loss-Heat-Creep-Arrester
deogratius2phantom
62 × 41 mm48 parts2LCC0-1.00
Building blocks
99 × 70.7 mm162 parts2LNo license47
Backup
333.2 × 205.9 mm218 parts2LNo license34
AVR/ArduinoLine V7 ATmega2560
120.9 × 152.5 mm188 parts4LNo license1
PROJ500 - Power Supply Board
AislingBee
130 × 115 mm256 parts2LNo license0
ESP32Sk612-delay
100 × 95 mm159 parts4LNo license47
Backup1
333.2 × 205.9 mm218 parts2LNo license34
Sk801-rgb
98.5 × 34.6 mm135 parts2LNo license47
ESP32Piezo amplifier
BeeHive-org
188.6 × 95.9 mm39 parts2LMIT13
BPSD-2025
68.5 × 43 mm50 parts2LNo license7
The LM393 in open source designs
The gallery holds 46 open source boards using the LM393 from 29 GitHub repositories; a typical one measures about 72.4 × 75 mm and carries around 74 components.
76% are two-layer designs, the rest use four layers or more, and 33% carry an open source license.
The most starred is Sk162-herd mixer by mirdej.
Parts used alongside the LM393
Microcontrollers on boards using the LM393
What boards using the LM393 are built for
LM393: common questions
Where can I find a LM393 reference design?
Each of the 46 boards on this page is a real design using the LM393. 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 LM393?
The MQ-X, CH340C, 74HC02, AMS1117-3.3 and MT3608 appear in the most repositories here.
Which microcontrollers do boards using the LM393 use?
Most are built on AVR/Arduino (6), ESP32 (4), RP2040/RP2350 (3) and NXP (1).
How big is a typical board using the LM393?
The median is 72.4 × 75 mm, and 76% are two-layer designs.
What is the most popular open source board using the LM393?
By GitHub stars, Sk162-herd mixer by mirdej, with 47 stars.
Can I simulate one of these boards using the LM393 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.