Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Sensor Model | LM75A |
| Interface Type | I2C (Inter-Integrated Circuit) |
| Temperature Range | -55°C to +125°C |
| Accuracy | ±0.5°C (typical at 25°C) |
| Resolution | 9-bit to 12-bit configurable |
| Operating Voltage | 2.7V to 5.5V |
| Package Type | SOIC-8 on Breakout Board |
| Address Pins | 3 Address Select Pins (A0, A1, A2) |
| Board Dimensions | 20mm x 15mm x 2mm |
| Application | Industrial Control, HVAC, IoT Projects |
Anonymous
Mar 28, 2026
Rating: 4/5
Great little board
Works great for my home automation system. The breakout pins are clearly labeled. Deducting one star only because it doesn't come with header pins soldered, but that's expected for this price point.
Anonymous
Mar 27, 2026
Rating: 5/5
Perfect for Arduino Projects
This LM75A module worked flawlessly with my Arduino Uno. The I2C communication was stable, and the temperature readings were consistent with my calibrated thermometer. Highly recommended for hobbyists.
Anonymous
Mar 27, 2026
Rating: 5/5
Best LM75A module I've bought
Clean PCB design and robust components. I've been running it continuously for two weeks without any drift or connection drops. Will definitely buy more for future projects.
Anonymous
Mar 14, 2026
Rating: 4/5
Good precision, easy to integrate
Solid sensor module. Integration with ESP32 was straightforward using standard libraries. The only minor issue is that the silk screen for the address pins is a bit small, but otherwise excellent value.
Anonymous
Mar 14, 2026
Rating: 5/5
Excellent accuracy
I compared this against a professional grade sensor and the variance was negligible. The ability to configure resolution via software is a nice touch for optimizing power consumption.
Anonymous
Mar 04, 2026
Rating: 5/5
Reliable and Fast Shipping
Arrived well-packaged. Tested immediately upon receipt, and the high-speed I2C interface performs exactly as described. Great for monitoring server room temperatures.
Q: What is the default I2C address?
A: The default I2C address is 0x4F when all address pins (A0, A1, A2) are left floating or connected to GND. You can change this by connecting the pins to VCC.
Q: Which library should I use for Arduino?
A: You can use the standard 'Wire' library included with the Arduino IDE. There are also specific LM75 libraries available in the Library Manager that simplify reading temperature values.
Q: Can I use this outdoors?
A: While the sensor chip itself handles a wide temperature range, the breakout board is not weatherproof. For outdoor use, please enclose it in a waterproof housing.
Q: Is this compatible with 3.3V logic levels?
A: Yes, the LM75A operates from 2.7V to 5.5V, making it fully compatible with both 3.3V and 5V microcontrollers like ESP32, Raspberry Pi, and Arduino.
Q: Does this module come with header pins pre-soldered?
A: No, the module is shipped without header pins soldered to allow for flexible mounting options. You will need to solder them yourself if required.
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