• The LM393, use of the wide voltage comparator that provide both digital and analog output.
• Treatment of nickel plating and surface, have fight oxidation, electrical conductivity, and life has more superior performance
• The comparator output, signal clean, good waveform, driving ability is strong, for more than 15 mA
• With potentiometer sensitivity adjustment and has a fixed bolt hole, convenient installation
• Output LED indicator.
• Compatible with Arduino.

mmWave-C4001 24Ghz Human Presence Detection Sensor

The DFRobot C4001 24GHz Millimeter-Wave FMCW Radar is the perfect solution for human presence detection. It features long-range measurement, high accuracy, advanced FMCW technology, durable build, easy integration, and strong anti-interference capabilities. Made with robust materials, this radar sensor ensures reliable performance in harsh conditions. Its state-of-the-art FMCW modulation provides superior accuracy, making it ideal for motion detection and proximity sensing. The compact design and versatile installation options simplify setup and enhance project capabilities. The C4001 radar sensor measures up to 25 meters and is suitable for real-time human presence detection. Available in various sizes.

• Using infrared reflective sensor TCRT5000.
• Detection of reflection distance: 1 mm to 25 mm.
• The comparator output signal clean, good waveform, driving ability, more than 15mA.
• With a multi-turn precision potentiometer adjustable sensitivity adjustment.
• The working voltage of 3.3V - 5V.

• Infrared Sensor: TSOP 1738 is the perfect solution for receiving IR signals from remote controls, making it ideal for home entertainment systems, robotics, and more.
• Precise Reception: With a center frequency of 38 kHz, TSOP 1738 offers precise reception of IR signals, ensuring your devices respond accurately.
• Low Power Consumption: TSOP 1738 features low power consumption, making it energy-efficient and suitable for battery-powered applications.
• Wide Detection Angle: The sensor has a 90-degree detection angle, providing excellent coverage for your IR remote control needs.
• Easy to Use: TSOP 1738 is easy to integrate into your projects, and its compatibility with TTL and CMOS ensures smooth operation.
• Reliable Performance: This sensor offers improved shielding against electrical field disturbance, guaranteeing reliable performance.

• Operating Supply Voltage: 5 volt
• Operating frequency: 38 KHz
• Operating current: 5mA
• Mounting: Pin hole
• Pin Count: 3

• Separate jumper adjustments are provided for changing the response time of the pressed key: 60mS fast mode or 160mS in Low power.
• TTP224 4-way switch digital touch capacitive touch sensor module
• 4 keyboard TTP224 capacitive touch sensor IC
• Onboard 4-level status indicator
• TTP 224 4 Channel Digital Touch Sensor is compatible with all Arduino’s board.
• The board finds applications in HMI(Human-machine Interface), mechanical Button key replacement.

• The input voltage of this module is 2Volts – 5.5 VDC.
• The response time max is ~ 60mS in fast mode, ~220mS at low power mode @VDD=3V.
• Sensitivity can adjust by the capacitance(0~50pF).
• Stable touching detection of the human body for replacing traditional direct switch key.
• Provides direct mode toggle mode by pad option (TOG pin).
• After power-on have about 0.5sec stable-time, during the time do not touch the keypad, and the function is disabled.
• Auto calibration and Re-calibration period is about 4.0 sec when the key has not been touched.