Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Add Infrared Detection to Your Next Project
The Photoelectric Counter IR LM393 is an infrared proximity sensor designed for light logging, optical switching, line tracking, and brightness-aware projects. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Working voltage: DC 5 V .
Important: Water-quality sensors usually need calibration solutions and regular probe care. Probe condition and temperature can affect the reading.
Why you’ll love it
- Power range: DC 5 V
- Compact size: 32mm x 11mm x 20mm
- Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
- Common controller support: Works well with Arduino, ESP32, Raspberry Pi, and similar boards
- Project-ready sensing: light logging, optical switching, line tracking, and brightness-aware projects
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Photoelectric Counter IR LM393 | infrared proximity sensor | Current item |
| Laser Photoelectric Switch GAB100M-AK-5V | button or switch input module with digital output | model GAB100M-AK-5V |
| IR Speed Sensor Module Based on LM393 | infrared proximity sensor with digital output | infrared sensing |
| Line Tracking Sensor Module for Arduino TCRT5000 LM393 | line tracking sensor | infrared sensing |
What you can build
This sensor is a good fit for automatic brightness control, line followers, light meters, UV monitors, flame detection, and optical encoders.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard or jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include breadboards, jumper wires, displays, enclosures, and logging modules, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Photoelectric Counter IR LM393 |
|---|---|
| Wide range of applications | Due to their adaptability and precision, photoelectric counters with LM393 are used in a variety of sectors, including manufacturing, logistics, and automation. |
| Working voltage | DC 5 V |
| Dimensions L x W x H | 32mm x 11mm x 20mm |
| Flexibility | The LM393 is a versatile electronic component that integrates readily with other electronic parts, enabling creative design and modification of the counter system. |
| Non-contact operation | The counter can identify things without making direct physical touch since it employs an infrared beam, making it appropriate for delicate or fragile products. |
| Category | optical light imaging photon sensors |
Wiring & usage notes
Check the pin labels on the Photoelectric Counter IR LM393 and match them to your controller voltage, ground, and signal pins. Keep wiring short and verify the logic level before powering the module. Water-quality sensors usually need calibration solutions and regular probe care. Probe condition and temperature can affect the reading.
What’s in the box
1 × Photoelectric Counter IR LM393
Frequently Asked Questions
What does the Photoelectric Counter IR LM393 measure?
It is designed to measure light, color, or optical changes.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
Does it need calibration?
Yes. Chemical and gas sensors usually need warm-up time, calibration, and periodic checking if you want stable readings.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →