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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 →The Temperature Sensor MCP9808 High Accuracy I2C Breakout Board is a temperature sensor with i2c designed for temperature logging, thermal control, and equipment monitoring. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Voltage - Supply: 2.7V ~ 5.5V; Interface: I2C; Accuracy: 0.25ºC typical.
| Product | Sensor style | Standout |
|---|---|---|
| Temperature Sensor MCP9808 High Accuracy I2C Breakout Board | temperature sensor with I2C | Current item |
| Temperature Contact-less Infrared Thermopile Sensor Breakout TMP006 | infrared proximity sensor | infrared sensing, capacitive touch input |
| Temperature and Humidity HTU21D-F Sensor Breakout Board | temperature and humidity sensor with I2C | I2C interface, digital output |
| Temperature Sensor DS18B20 Module for Arduino | temperature sensor with digital output | analog output, digital output |
This sensor is a good fit for thermostats, incubators, battery monitors, weather nodes, and thermal data loggers.
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus an I2C cable or jumper wires for quick setup and testing.
Useful add-ons include probe mounts, thermal paste if needed, and a data logger, depending on how you plan to power, mount, and log the sensor.
| Product | Temperature Sensor MCP9808 High Accuracy I2C Breakout Board |
|---|---|
| Voltage - Supply | 2.7V ~ 5.5V |
| Operating Current | 200 μA (typical) |
| Accuracy | 0.25ºC typical |
| Weight | 0.9g |
| Sensing Temperature | -40ºC ~ 125ºC |
| Operating Temperature | -40ºC ~ 125ºC |
| Interface | I2C |
Connect VCC, GND, SDA, and SCL to your controller. Use the correct board voltage and I2C address in your code. Sensor response time depends on airflow, mounting, and thermal contact. Keep heat sources and self-heating from nearby parts in mind.
1 × Temperature Sensor MCP9808 High Accuracy I2C Breakout Board
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One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
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read tutorial →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 →Share what you built. Photos, BOM, what worked, what didn't.
view thread →Symptom + what you tried + clear photo = answers within hours.
view thread →Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
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