1. Onboard precision miniature voltage transformer
2. On-board high-precision op amp circuit, which performs functions such as accurate sampling and proper compensation of signals.
3. The module can measure AC voltage within 250V, and the corresponding output analog can be adjusted.
4. Sine wave, the middle value (DC component) of the waveform is 1/2VCC.

• This compact sensor fits into small projects such as UAVs and robot navigation systems.
• The sensor converts any magnetic field to a differential voltage output on 3 axes.
• This voltage shift is the raw digital output value, which can then be used to calculate headings or sense magnetic fields coming from different directions.
• A development board that provides a simple interface for the HMC5883L (three-axis magnetic field module).

• Get full control over your project with a massive temperature range, from a freezing -50°C all the way to 110°C.
• No need to buy a separate sensor! A high-quality, waterproof temperature probe is already included in the package.
• Setting it up is very simple; just use the simple '+' and '-' buttons, no coding knowledge needed at all.
• Easily connect and control both your home AC appliances and 12V DC devices like fans, coolers, or pumps.
• Fine-tune your system perfectly with advanced options for heating/cooling modes, timer delays, and safety alarms.
• A proper device for students and DIY makers, perfect for building everything from egg incubators to automatic room coolers.

• 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.