ALLNET 4duino NTC 10k Threshold TTL Temperature Sensor Module

The ALLNET 4duino NTC 10k Threshold TTL is a compact temperature sensor module designed for microcontroller projects. It features an NTC thermistor with a 10k ohm resistance at 25°C and provides a digital TTL output when the temperature crosses a user-adjustable threshold. Ideal for DIY thermostats, environmental monitoring, and temperature control systems.

Advantages

Easy to integrate with Arduino, Raspberry Pi, ESP32, and other microcontrollers. On-board potentiometer allows precise threshold adjustment. Built-in LED indicator for quick visual status. Low power consumption makes it suitable for battery-powered applications.

Suitable for

• Temperature monitoring and control projects
• DIY thermostats and HVAC systems
• Environmental sensing with microcontrollers
• Educational electronics and prototyping

Key specifications

• Sensor Type: NTC Thermistor
• Thermistor Resistance: 10 kOhm (at 25°C)
• Output Type: Digital (Threshold)
• Output Signal Level: TTL (0V / VCC)
• Operating Voltage: 3.3V - 5V DC
• Threshold Adjustment: On-board Potentiometer
• Comparator IC: LM393 (or compatible)
• Indicator LED: Yes (for threshold status)
• Interface Pins: 3-pin header (VCC, GND, DOUT)
• Temperature Detection Range: -30°C to +100°C (typical)
• Compatibility: Arduino, Raspberry Pi, ESP32/ESP8266, Microcontrollers
• Application: Temperature monitoring, DIY thermostat, environmental sensing
• Module Function: Temperature Threshold Switch
• Sensor Connection: 2-pin header for external NTC probe
• Current Consumption: Low (mA range)

Recommendations

For best results, use with a stable 3.3V or 5V power supply. Adjust the threshold potentiometer carefully while monitoring the output. Suitable for indoor use; avoid exposure to extreme temperatures beyond the specified range.