Description RC522 chip: MF RC522 is applied to the highly integrated read and write 13.56MHz contactless communication card chip, NXP launched by the company for the "table" application of a low-voltage, low-cost, small size of the non-contact card chip to read and write, smart meters and portable handheld devices developed better choice. The MF RC522 use of advanced modulation and demodulation concept completely integrated in all types of 13.56MHz passive contactless communication methods and p

Description Two cadmium sulphide(cds) photoconductive cells with spectral responses similar to that of the human eye. The cell resistance falls with increasing light intensity. Applications include smoke detection, automatic lighting control, batch counting and burglar alarm systems

Description The sensor module light is adaptable to the environment, it has a pair of infrared transmitting and receiving tube, tube infrared emit a certain frequency, when detecting direction meet with obstacles (reflecting surface), reflected infrared receiving tube, after the comparator circuit processing, green indicator will light up, at the same time signal output interface to output digital signal (a low level signal), can be through the potentiometer knob adjust the detection distance, e

Description 100% Brand new and high quality Size:32mm*17mm*15mm(length*width*height) Main chip:LM393, Electret condenser microphone Working voltage:DC 4-6V Features: Signal output indication Single channel signal output The output effective signal is low level When there is sound,outputs low level and the signal light Can be used for Acoustic control light , give sound and light alarm working with Photosensitive sensor, and sound control,sound detect Circuit board output switch quantity Note:The

Description Manufactured By Atomic Market Operating voltage 3.3V-5V Sensitivity can be adjusted via potentiometer The sensor uses the FR-04 high-quality double-sided materials, King Size 5.0 * 4.0CM, and with the surface of the nickel plating treatment, against oxidative, conductivity, superior performance and longevity; Small board PCB size: 3.2cm x 1.4cm Wide voltage LM393 comparator How to use: Connected to 5V power supply, the power indicator light, sensor board is not water droplets

Description Electronic block arduino Soil Moisture Sensor Features: 1. This is a simple and easy moisture sensor can be used for the detection of soil moisture, when soil water shortage, the module outputs a high level, whereas the output low level. Using the sensor produces a watering device automatically, let you don't choose and employ persons to manage the plants in the garden. 2. The sensitivity is adjustable digital potentiometer to adjust (blue). 4. The working voltage of 3.3 V to 5 V. 5.

Description The LM35 Temperature Sensor is an integrated circuit-based sensor that generates an analog voltage proportional to the temperature of the immediate surrounding area. It is commonly available in a TO-92 package just like a typical small-signal transistor. Specifically, the LM35 outputs a voltage that is proportional to the temperature in degrees Celsius with 10 millivolts/°C. So, for example, if output voltage is 300mV, the ambient temperature is 30°C. If output voltage is 500mV, am

Description The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do. It offers excellent range accuracy and stable readings in an easy-to-use package. It operation is not affected by sunlight or black material like Sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect). Similar in performance to the SRF005 but with the low-price of a Sharp infrared sensor. Power Supply :5V DC Quiescent Current : <2mA Ef