20pcs sound detection

Features: The product boast of output signal instruction. Single-channel signal output. Output valid signal is low and the light will be bright. Specification: Size: 3.1 x 1.6 x 0.8cm Operating current pressure: 4V - 6V Package included: 20 x Sound detection sensor module

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5Pcs Sound Detection Sensor Module LM393 Chip Electret Microphone For Arduino

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20Pcs Soil Hygrometer Humidity Detection Moisture Sensor For Arduino Description: This is a summary of the soil moisture sensor can be used to detect moisture, when the soil is dry, the module outputs a high level, whereas output low. Using this sensor make an automatic watering system, so that your garden plants without people to manage. Operating voltage: 3.3V~5V. Adjustable sensitivity (shown in blue digital potentiometer adjustment) Dual output mode,analog output more accurate. A fixed bolt hole for easy installation. With power indicator (red) and digital switching output indicator (green). Having LM393 comparator chip, stable. Panel PCB Dimension: 3cm x 1.5cm. Soil Probe Dimension: 6cm x 2cm. Cable Length: 21cm. VCC: 3.3V-5V. GND: GND. DO: digital output interface(0 and 1). AO: analog output interface. Instructions for Use: 1. Soil moisture module is most sensitive to the ambient humidity is generally used to detect the moisture content of the soil. 2. Module to reach the threshold value is set in the soil moisture, DO port output high, when the the soil humidity exceeds a set threshold value, the module D0 output low. 3. The digital output D0 can be connected directly with the microcontroller to detect high and low by the microcontroller to detect soil moisture. 4. The digital outputs DO shop relay module can directly drive the buzzer module, which can form a soil moisture alarm equipment. 5. Analog output AO and AD module connected through the AD converter, you can get more precise values of soil moisture. Package Included: 20 x Soil moisture detector module 20 x Probe 20 x 2P Jumper Cable

Product Usage: 1, the meter pulse data sampling 2, fax machine shredder paper detection 3, obstacle detection 4, black and white line detection Product parameters: Infrared reflection sensor: TCRT5000 Detection reflection distance: 1mm~25mm Working voltage: 5V Output form: digital signal (0 and 1) Installation: with fixing bolt holes Small board PCB size: 3.5cm x 1cm Single weight: 4.5g Features: The infrared emitting diode of the TCRT5000 sensor continuously emits infrared rays. When the emitted infrared rays are not reflected back or reflected back but the intensity is not large enough, the infrared receiving tube is always in the off state, and the output end of the module is low level, indicating The diode is always off; when the detected object appears in the detection range, the infrared light is reflected back and the intensity is large enough, and the infrared receiving tube is saturated. At this time, the output end of the module is high, indicating that the diode is illuminated. Wiring: 1. VCC: Connect the positive pole of the power supply (5V) 2, GND: connected to the negative power supply 3, OUT: high / low level switching signal (digital signal 0 and 1) Package Included: 20 x TCRT5000 tracing module (tested, electrostatic bag packaging)