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.
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