Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Chip Model	LM393 Dual Voltage Comparator
Operating Voltage	DC 3.3V to 5V
Output Type	Digital Switching Output (0 and 1)
PCB Dimensions	30mm x 14mm
Mounting Hole Diameter	3mm
Power Indicator	Red LED
Output Indicator	Green LED
Threshold Adjustment	Blue Potentiometer
Interface Type	3-Pin Header (VCC, GND, OUT)
Compatibility	Arduino, STM32, Raspberry Pi, ESP8266

5 reviews

Anonymous

Apr 06, 2026

Rating: 4/5

Good value

Module works well. Instructions could be better for beginners, but plenty of tutorials online. Solid build quality.

Anonymous

Mar 26, 2026

Rating: 3/5

Potentiometer is stiff

The module functions correctly, but the blue potentiometer was quite hard to turn on one of the units. Otherwise okay.

Anonymous

Mar 20, 2026

Rating: 5/5

Great for line following robots

Using these for IR sensor arrays on a line follower. Response time is quick and voltage levels are stable.

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect for Arduino Sensors

Works exactly as expected. Used it to interface a photoresistor with my Arduino Uno. The potentiometer makes threshold adjustment very easy.

Anonymous

Jan 28, 2026

Rating: 5/5

Reliable Comparator

Bought 10 for a classroom kit. All functioning perfectly. Clean soldering and stable output signals.

5 FAQ

Q: Can this drive a 5V relay directly?

A: It is recommended to use a transistor or driver circuit as the output current is limited.

Q: Is this compatible with 3.3V ESP32?

A: Yes, it operates comfortably within the 3.3V logic range.

Q: How many comparators are on the chip?

A: The LM393 IC contains two independent voltage comparators, though this module typically uses one channel.

Q: What is the maximum input voltage?

A: The module is designed for 3.3V to 5V logic levels. Do not exceed 5V on VCC.

Q: Does it come with headers soldered?

A: Usually shipped with pins included but unsoldered for flexible mounting.

Explore your interests

Beikecom ESP32-S3 Core Board (N8R2/N16R8) with Bluetooth/WiFi Module, 44-Pin Xiaozhi Robot

$29.20

Platinum Resistance Temperature Detector Module PT100/PT1000 RTD Sensor with Host Software

$39.90

Rain Drop Sensor Module Rain Detection Weather Module Water Level Display Module

$4.03

N52 Super Strong Square Magnet, Neodymium Iron Boron Bar Magnet, Powerful Magnetic Blocks

$10.50

Instax Shutter Timer Selfie Artifact Fujifilm instax SQ Series Non-Destructive Installation

$58.00

STM32 Beginner Kit Minimum System Board Electronic Breadboard Same as University Science Association Models

$56.60

lalaci Round N52 Strong Magnet High Performance Powerful Small Magnet Diameter 1/2/3/4/5/6/8 Manufacturer NdFeB

$3.25

Car Vibrator/Piezoelectric Vibration Sensor Motorcycle Anti-Theft Alarm Vibration Sensor Module Ceramic Plate

$13.00

N52 Strong Magnet Small Round Mini Powerful Tiny Magnet High-Performance Neodymium Iron Boron Super Strong Magnet Steel 2-8mm

$5.50

Natural Cinnabar Rose Beads, Purple Gold Sand 'Blooming Prosperity' DIY Bracelet and Ring Accessories, Buddhist Prayer Bead Charms

$1.30

Strong Magnet with Hole Square Magnet Block High-Performance Neodymium Iron Boron Countersunk Hole Magnet Steel Magnet Stone Patch

$0.50

New Stainless Steel Solder Wire Lighter Usable High Purity Tin Wire Universal Welding Tool Soldering Wire

$2.90

New Industrial Iron Picker Iron Sucker Magnetic Quick Magnetic Rod G Parts Manual Magnet Nail Sweeper Simple

$386.24

Waveshare MCP23017 I/O Expansion Module Compatible with Raspberry Pi/Micro:bit/STM32/Arduino

$34.00

Voice Playback Module MP3 Prompter Trigger Once Play Once Announcer Compatible with Arduino

$29.00

TCS34725 Color Recognition Sensor, RGB Development Board Color Sensing Module, IIC Communication Color

$22.36

MQ-8 Hydrogen Gas Sensor Module

$7.73

MAX30100/MAX30102 Blood Oxygen Heart Rate Wrist Pulse Detection Monitoring Biosensor Module

$5.39

300 SMT Component Soldering Kit High-Intensity Practice Board PCB Skills Competition TJ-56-273

$42.40

Kunlun Coast Industrial Wide-Temperature Transmitter Split Type Temperature and Humidity Sensor JWSK-6

$100.00

Digital + Analog LM386 Sound Detection Sensor Voice Control Switch Audio Waveform Microphone Module

$20.00

NVIDIA JETSON NANO B01 Development Board 4GB Core ORIN Kit AI Artificial Intelligence ROS Motherboard

$899.00

Wildfire Shengteng Mini FPGA Development Board Xilinx Artix-7 XC7A35T/100T/200T A7 Board

$665.00

EchoEar MeowMate PCB Development Board Kit Components Espressif Xiaozhi AI Volcengine Open Source Replica

$0.50

Strong Magnetic Rod with Lifting Ring Industrial Magnetic Force 304 Stainless Steel Stable Mining Iron Removal Magnet

$202.00

Thickened Strong Magnetic Rubber Soft Magnetic Sheet A4 Advertising Magnetic Car Sticker, Flexible Magnet with Adhesive Backing, Magnetic Paper

$17.50

[Corrosion-Resistant] DFRobot Capacitive Soil Moisture Sensor Module Dry/Wet Detection

$35.00

(Loose Parts) Photo-Sensitive Light-Controlled Audio-Visual Alarm Kit with Buzzer and Double-Sided PCB Board for Teaching, Training, and Soldering Practice

$6.80

FarSight WS63 NearLink Development Board Hi3863 HarmonyOS OpenHarmony IoT WiFi Bluetooth BLE

$199.00

Raspberry Pi 4 Case Aluminum Alloy Heat Dissipation

$21.90

Anlixin Solder Paste Solder Cream SMT Patch Mobile Phone Repair Reballing LED Welding High Medium Low Temperature Lead-Free Solder Mud

$25.80

Strong Magnetic Suction Patches, Round Neodymium Magnets with Holes, High-Strength Fixed Suction Force

$2.55

Desktop Soldering Fixture for Mobile Phone Repair - Electronic Holding Stand with Soldering Iron Support and Auxiliary Tools

$11.64

GY-530 VL53L0X Laser Distance Sensor ToF Ranging Time-of-Flight Sensor Module

$12.31

SC7A20H 3-Axis Acceleration Tilt Angle Sensor Module, Inclination and Level Detection with Serial Output

$11.35

N52 Strong Magnet Iron Attractor Round Powerful Magnet Magnetic Stone Sheet Neodymium Iron Boron High-Strength Magnet Rare Earth Magnetic Steel Permanent Magnet

$7.07