Description
Reviews
| 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 |
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.
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.
Automatic Feeder - Stainless Steel Food Machinery Accessory Equipment
$20,150.00
Henkel Loctite Super Glue Series: 401, 406, 460, 480, 495, 4011, 4161, 496, 382, 410
$28.00
Over-Toilet Storage Rack with Tissue Organizer for Bathroom, Vanity, and Shower Gel - Multi-Use Bathroom Shelf
$27.66
15-inch Carbon Fiber FPV Drone Frame - High-Strength Quadcopter Aerial Photography Chassis Direct Sale
$396.44
Petal-Shaped Ceramic Tea Scoop and Holder for Gongfu Tea Ceremony
$97.00
Scented Candle Waxing Cotton Wick with Base Wick Fixer Sticker DIY Materials
$0.35
Stainless Steel Fish Tank Converter - Bucket to Aquarium Adapter with Inverted Stand and Faucet Spout for Mineral Water Jugs
$13.58
Non-woven Cleaning Cloths, Lint-free Wiping Rags, Oil-absorbing Paper, Machine Cleaning Cloth, Dust Removal Cloth for Subway Use (No Washing Required)
$138.00
Large Paint Brush Set - Watercolor Pen Kit for Children's Day Art and Drawing
$31.25
Foldable Car Tire Stone Removal Tool, Explosion-Proof Scraper Hook for Extracting Pebbles from Tires
$19.53
Black Swan Watercolor, Gouache, and Acrylic Paint Brush Set - Professional Art Painting Tools for Numbered Paint-by-Number Kits
$6.80
Jiangchuan 800 Roll-to-Roll Oil-Heated Roller Heat Transfer Machine – Digital Sublimation Printer for Curtain Fabric Rolls
$147,743.75
Traditional Handcrafted Wooden Rattle for Newborns – Safe for Teething, Intangible Cultural Heritage Toy
$10.10
All-Season Quiet and Comfortable Vacuum Tires for Buick Enclave 2013-2014 - Custom Fit, Wear-Resistant
$458.00
Mia Core Paper Stump and Blending Knife Set, Double-Ended Blending Pen for Sketching, Art Student Drawing Tools (S/M/L)
$4.28
Feileniao Gongbi Painting Draft Sheets – Pre-Outlined Bird-and-Flower Designs on Sized Xuan Paper for Color Filling Practice
$8.42
Automatic Retractable Air Hose Reel, Electronic Drum, Water Drum, Yarn Clamp, Air Pump Hose for Auto Repair, Beauty, Gardening, and Washing
$280.00
LA Curved Surface Screen Printing Machine - Automatic Cup Printer, Cylindrical Net Printer for Cosmetic Bottles
$26,750.00
Bathroom Toilet Storage Rack - Over-Toilet Shelf for Bathroom, Restroom, Washing Machine with Flip Lid - Space-Saving Organizer
$59.00
Heavy-Duty Chain Slings for Lifting Rebar and Steel - Manganese Steel Lifting Chains
$113.00
Toilet Storage Rack - No-Drill Bathroom Organizer for Restrooms and Washrooms
$14.80
Shuhai Blanching and Scalding Machine Fully Automatic Fresh Steam FVJ Vegetable Cooking and Cooling Equipment Enoki Mushroom Shiitake Blanching Flow Cooling
$18,900.00
PELICAN 1020 Waterproof Case - Compact Protective Box for Earphones with Free Shipping
$40.00
Marie's Collapsible Brush Washing Bucket Art TEP Watercolor Chinese Painting Brush Rinser Portable Silicone Extendable Small Paint Washing Bucket for Art Students
$12.50
Duosoduoxi Black Series Paper Blending Stumps (6-Pack) - Elastic Xuan Paper Tools for Art Exams and Sketch Highlighting
$5.10
Factory Direct 502 Super Glue - Instant Adhesive, 3-Second Bond, High-Strength Fast-Drying Glue for Furniture and Wood Repair
$1.28
NORTON Industrial Red Scouring Pad for Stainless Steel Brushing, Polishing, and Rust Removal – Fine Grit Abrasive Cloth
$17.50
Bucket Pack Soft-Tip Glitter Markers, Non-Toxic Washable Color Pens for Student Art and Drawing, Gel Highlighters
$2.99
6-Piece Nylon Brush Set for DIY Aromatherapy Candles, Plaster Coloring, Outlining, Detailing, Gouache, Acrylics, and Baking
$1.28
Activated Carbon Filter, Quartz Sand Filter, Fiber Ball Filter, Wastewater Filter, Environmental Protection Equipment
$45,000.00
![[Corrosion-Resistant] DFRobot Capacitive Soil Moisture Sensor Module Dry/Wet Detection](https://www.gosteppe.com/cache/medium/product/3259/legacy-main-2f0d3454b36b32391d263648.webp)
