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Hardware: Sensors
0001 Jun 1
7 minutes read

Hardware: Sensors

Soil Hygrometer Detection Moisture Sensor Module for Arduino + Probe ET

1 .This is a simple moisture sensor can be used to detect soil moisture, when soil water shortage, module output a high level, whereas the output low level. Using the sensor produces an automatically watering device , let you don’t manage the plants in the garden.
2 .The sensitivity can be adjust by blue potentiometer
3 .Working voltage : 3.3 V – 5 V
4 . Double output mode, the digital output is simple and more accurate analog output.
5 .Set the fixed bolt hole, convenient installation
6 .Small board PCB size: 3 cm * 1.6 cm
7 .Power indicator light (red) and digital switch output indicator light (green)
8 . comparator adopted LM393 chips, work stability

Interface Description (4-wire)

  1. VCC: .3 V-5V
  2. GND: GND
  3. DO: digital output interface (0 and 1)
  4. AO: Analog Output Interface

Photodiode LM393

3.Operating voltage 3.3V-5V
4.Output in the form
a.Analog voltage output
b.Digital switching outputs (0 and 1)

1.VCC:3.3V-5V external voltage (can be directly connected to the 5v microcontroller and 3.3v microcontroller)
2.GND:connect to GND
3.DO:Module digital output interface (0 and 1)
4.AO:Module analog output interface

Sensitivity Control Potentiometer Sound LM393

Main Chip: LM393, Electret condenser microphone
Working Voltage: DC 4-6V
Signal output indication
Single channel signal output
The output effective signal is low level
When there is sound,output low level and the signal lights
Can be used for Acoustic control light; give sound and light alarm working with Photosensitive sensor
Note:The Maximum induction distance is 0.5M

Ultrasonic Module HC-SR04 Distance Measuring Transducer Sensor

1: Voltage: DC 5V
2: Static current: less than 2mA
3: Electrical level output: 5V high
4: Electrical level output: at the end of 0V
5: Induction angle: not more than 15 degrees
6: Detection distance: 2cm-450cm
7: High precision: 2mm

Wiring: VCC, trig (control side), echo (receiving end), GND

3 Module works:
(1) using IO trigger distance, the high signal to at least 10us;

(2) module automatically sends eight 40khz square wave, automatically detects whether a signal return;

(3) a signal back, through the IO output a high electrical level, high electrical level duration is: the ultrasound time from launch to return. Test distance = (time of the high electrical level * speed of sound (340M / S)) / 2;

DHT22 Pressure/Humidity sensor

Humidity DHT21 AM2301 Digital Temperature And Humidity Sensor

DS18B20 One Wire Digital Temperature Sensor

  • Waterproof Digital Thermal Probe or Sensor DS18B20 Length:1M
    • High quality stainless steel tube encapsulation waterproof moistureproof prevent rust
    • Stainless steel shell 6*50mm
    • 5.Power supply range: 3.0V to 5.5V
    • Operating temperature range: -55°C to +125°C (-67°F to +257°F)
    • Storage temperature range: -55°C to +125°C (-67°F to +257°F)
    • Accuracy over the range of -10°C to +85°C: ±0.5°C.
    • No other components, unique single bus interface
    • Output lead: red (VCC), yellow(DATA) , black(GND)
    • Cable length: 100 cm

  • DS18B20 Temperature Sensor Module Temperature Measurement Module For Arduino
    • board DS18B20 chip left 3P hole seat easily accessible DS18B20 chip.
    • pin chip has all the leads, built-in pull-up resistor.
    • Onboard power indicator.
    • board size: 21 (mm) x10 (mm).

ambient noise

ambient Temperature

BOSCH BMP085 Digital Barometric Pressure Sensor Board Module For Arduino STM32

BMP085 is a high precision, ultra-low power consumption pressure sensors, can be applied to mobile devices.
Its performance, the absolute accuracy of the minimum can reach 0.03hPa, and very low power consumption, only 3μA.
BMP085 powerful 8-pin ceramic-lead chip carrier (LCC) ultra-thin package, through the I2C bus can be connected directly with a variety of microprocessor.
Pressure range: 300 - 1100hPa (9000 meters above sea level to -500 m).
Power supply voltage: 1.8V - 3.6V (the VDDA).
1.62V - 3.6V (VDDR).
LCC8 package: lead-free ceramic carrier package (LCC).
Size: 5.0mmx5.0x1.2mm.
Low power consumption: 5μA in standard mode.
Precision: low-power mode, the resolution of 0.06hPa (0.5 m).
High linear mode with a resolution of 0.03hPa (0.25 m).
With temperature output.
I2C interface.
Temperature compensation.
Lead-free, RoHS compliant.
MSL 1.
Response time: 7.5ms.
Standby current: 0.1μA.
Eliminates the need for an external clock circuit.
Size:2cm X 1.57cm





Air Quality

Fiagor TGS2600

MiCS-5525 Carbon Monoxide sensor

MiCS-2710 Nitrogen Dioxide sensor

MQ135 NH3, NOx, alcohol, Benzene, smoke, CO2

MG811 C02



Carbon monoxide
Liquefied petroleum gas


requires a power cycle: 1.4v at 90s, and 5v at 60s and repeat.

MQ-131 OzoneОзон




UVI-01 UV sensor

BH1750FVI Digital Light intensity Sensor Module For AVR Arduino 3V-5V power

chip : BH1750FVI
Power supply: 3v-5V power
Light range :0-65535 lx
Sensor built-in : 16 bitAD converter
Direct digital output, bypassing the complex calculation, bypassing the calibration
Don't distinguish between ambient light
Close to the spectral characteristics of visual acuity
widely use to 1-lux high precision measurement
Standard NXP IIC communication agreement

3.3-5V input LM393 light Sensor Module for Arduino DO/AO output Dupont cables

1.That can sense the fixed direction of the light source can detect the brightness of surrounding environment and the light intensity (comparison with the photoresistor, directional comparison)
2.Sensitivity adjustable the blue digital potentiometer adjustment (Figure)
3.Operating voltage 3.3V-5V
4.Output in the form
   a.Analog voltage output
   b.Digital switching outputs (0 and 1)
5.PCB size: 3cm * 1.6cm

Module interface specification (4-wire):
1.VCC:3.3V-5V external voltage (can be directly connected to the 5v microcontroller and 3.3v microcontroller)
2.GND:connect to GND
3.DO:Module digital output interface (0 and 1)
4.AO:Module analog output interface

Instructions for use:
1.Photodiode module is most sensitive to the ambient light, generally used to detect the brightness of the ambient light intensity, photoresistor sensor module Universal In most cases, the difference between the two is that photodiode module directional, can sense the fixed the direction of the light source.
2.Module in the light conditions or the light intensity of less than a set threshold, DO port outputs a high level, when the external environment when the light intensity exceeds the set threshold value, the module D0 output is low;
3.Module digital output D0 can be directly connected with the microcontroller, microcontroller to detect high and low, to detect environmental light intensity change;
4.Module digital output DO module can directly drive relays, which can form a photoelectric switch;
5.Module analog output AO and AD module connected through the AD converter, the ambient light intensity can get more precise values

Photoresistance detection Optical Photosensitive light sensor module for Arduino

Comparator chip LM393 ,it is stable.
Can detect the ambient brightness and light intensity
Accuracy adjustable
Operating voltage 3.3V-5V
Output: DO digital switch outputs (0 and 1)   AO analog voltage output
power indicator and digital switch output indicator
With a mounting screw hole
PCB size: 3.1cm * 1.5cm 
Interface Description (4-wire):
     1 VCC -- 3.3V-5V voltage
     2 GND -- GND
     3 DO  -- board digital output interface (0 and 1)
     4 AO  -- board analog output interface 
This module is sensitive to the light, Usually used for detecting the ambient brightness and light intensity.
When there is no light or the light intensity can not reach the value,DO output is high level.when light intensity over than the value, the module DO output is low level.
The module digital output DO can be directly connected with the microcontroller,use microcontroller detect high or low level, so that can detect the environmental light intensity change.
Can use this board digital output DO port drive relay module directly(our store on sale these relay modules), can use as a photoelectric switch.
The analog output AO connect with AD module,it can get more precise light intensity value through the AD converter.


HC-SR501 Adjust IR Pyroelectric Infrared PIR Motion Sensor Detector Module

Color: White + Green
Dimension: 3.2cm x 2.4cm x 1.8cm (approx)
Infrared sensor with control circuit board
The sensitivity and holding time can be adjusted
Working Voltage Range: DC 4.5V- 20V
Current drain:<60uA
Voltage Output: High/Low level signal:3.3V TTL output
Detection distance: 3--7M(can be adjusted)
Detection range: <140°
Delay time: 5-200S(can be adjusted, default 5s +-3%)
Blockade time: 2.5 S (default)
Trigger: L: Non-repeatable trigger H: Repeat Trigger (default)
Work temperature:-20-+80°C
Trigger Method: L unrepeatable trigger / H repeatable trigger


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