Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Detection Range | 0V - 25V DC |
| Output Signal | Digital Switch (High/Low) |
| Adjustment Method | Blue Potentiometer |
| Comparator Chip | LM393 |
| Indicator LED | Power and Trigger Status |
| Mounting Hole Diameter | 3.1 mm |
| PCB Dimensions | 32mm x 14mm |
| Interface Type | 3-Pin PH2.0 Connector |
| Compatibility | Arduino, Raspberry Pi, ESP32 |
Anonymous
Mar 30, 2026
Rating: 5/5
Reliable and compact
We use these in our workshop for various prototyping tasks. They are small enough to fit into tight enclosures and the LED indicators are bright and clear.
Anonymous
Mar 30, 2026
Rating: 4/5
Good value but needs calibration
Great little sensor for the price. Just remember that you need a multimeter to calibrate the trigger point accurately using the blue screw. Once set, it stays stable.
Anonymous
Mar 23, 2026
Rating: 5/5
Perfect for DIY voltage monitoring
This module works exactly as described. The potentiometer makes it very easy to set the threshold voltage. I used it with an Arduino Uno to monitor a battery pack, and the response time is instant.
Anonymous
Mar 17, 2026
Rating: 5/5
Essential for learning electronics
Bought this for my university project on embedded systems. The documentation provided by the seller was helpful, and the board quality is solid with clean soldering.
Anonymous
Mar 09, 2026
Rating: 5/5
Exceeded expectations
Very sensitive and accurate. I tested it against a professional bench power supply and the trip point was within 0.1V of my setting. Highly recommended for hobbyists.
Anonymous
Mar 01, 2026
Rating: 4/5
Works well with ESP32
No issues connecting this to my ESP32 development board. The logic levels match perfectly. Only minor complaint is the pin headers were not included, so I had to solder my own.
Q: Can this module detect AC voltage?
A: No, this sensor is designed specifically for DC voltage detection only. Using it with AC sources may damage the component.
Q: Does this come with jumper wires?
A: The package includes the PCB module only. Jumper wires and mounting screws are not included but are standard sizes easily found in any electronics kit.
Q: How do I adjust the voltage threshold?
A: Use a small Phillips head screwdriver to turn the blue potentiometer on the board. Rotate it slowly while measuring the output with a multimeter or observing the LED until the desired trigger point is reached.
Q: What is the maximum current this module can handle?
A: This is a signal detection module, not a power relay. It draws very little current (approx. 10mA) and is meant to sense voltage levels, not switch high-power loads directly.
Q: Is the output compatible with 5V logic systems?
A: Yes, the module operates on 3.3V to 5V and provides a digital high/low output that is fully compatible with 5V microcontrollers like Arduino Uno and Nano.
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