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This is a PIR (passive infrared motion) sensor designed to work with Arduino and Raspberry Pi. It allows you to sense motion, it is commonly used to detect whether a human has moved in or out of the sensor’s range. They are small, inexpensive, low-power, easy to use, and don’t wear out. For that reason, they are commonly found in appliances and gadgets used in homes or businesses. They are often referred to as PIR, “Passive Infrared”, “Pyroelectric”, or “IR motion” sensors.

• Low power consumption
• Compact size
• Cost-effective
• Adjustable sensitivity

• 1 x Gravity: Digital PIR Sensor
• 1 x Gravity: Digital Cable

This is a High-accuracy good quality IR sensor from Waveshare. Infrared Obstacle Avoidance IR Sensor Module (Active Low) has a pair of infrared transmitting and receiving tubes. When the transmitted light waves are reflected back, the reflected IR waves will be received by the receiver tube. The onboard LM393 voltage comparator circuitry does the processing and the green indicator LED comes to life.

The module features a 4 wire interface with Vcc, GND, DOUT, and an AOUT pin on its tail. It works fine with 3.3 to 5V levels. Upon hindrance/reflectance, the output pin gives out a digital signal (a low-level signal). The onboard preset helps to fine-tune the range of operation, the effective distance range is 2cm to 30cm.

• Robot path tracking
• Obstacle-avoiding car
• Pipeline counter

• Easy to assemble and use
• Onboard detection indication
• The effective distance range of 2cm to 30cm
• A preset knob to fine-tune distance range
• If there is an obstacle, the indicator lights on the circuit board.
• Emitting a beam of infrared, and receive the reflected beam
• Features wide-range voltage comparator LM393
• Adjustable sensitivity

• 1 x Infrared Proximity Sensor
• 1 x XH2.54 4PIN wire

R20DC 125KHz and 13.56MHz 2-in-1 USB Proximity Sensor Smart RFID ID IC Card Reader reading distance up to 8cm, which is widely used for RFID radio frequency identification systems and projects, such as automated parking management, personal identification and production access control.

This RFID card reader can read RFID card serial numbers and output them to your computer according to the specified format, then management software derives many more functions.

Installation Steps :

• Connect with a computer through the USB cable inside
• Open notepad or a word document
• Put the card on the top of the reader
• The document will output card number automatically

Note: No RFID card or Tag are included in the package you have to buy it separately

• USB Plug and Play.
• Operating Frequency: 125KHz and 13.56MHz (2-in-1)
• RFID reader 0-8cm Reading Distance.
• Win8/7/XP/Android Supported.
• S50/S70 Card Supported.
• OTG Phone Connection.
• Built-in buzzer and LED for identification.
• Widely used at apartment, office, supermarket and other places.
• Supporting System: Windows87XP982000 CEMENT, LINUX, Vista

• 1 x R20DC 125KHz and 13.56MHz 2-in-1 Card Reader
• 1 x USB Cable

360° Degree Rotary Encoder Module Brick Sensor is a rotary input device (as in knob) that provides an indication of how much the knob has been rotated AND what direction it is rotating in. It’s a great device for stepper and servo motor control.  You could also use it to control devices like digital potentiometers.

360° rotary Degree encoder, is an incremental electro-mechanical device that converts the angular position or motion of a shaft or axle to digital code. The output of incremental encoders provides information about the motion of the shaft, which is typically further processed in processor/controllers into information such as speed, distance, and position.

Note: This module does not come with a fitting nut or washer , you have to buy it separately (the size required is 6.6mm)

• 1 x 360° Degree Rotary Encoder

Knob in the form of an encoder with a button that allows you to create a simple user interface. The module sends a digital signal on the SIA and SIB pins, depending on the direction of rotation. It works with voltages from 3 V to 5.3 V.

The sensor has a 5 pin connector with digital outputs SIA, SIB and SW to be attached to the pin of the microcontroller, e.g. Arduino.

Operating principle:
Incremental encoder is a kind of rotation sensor for translating the rotary displacement into a sequential of digital pulse signal. The displacement can be gained by counting the number of the pluses outputted in the course of clockwise or anticlockwise rotation. Comparing with the potentiometer, the rotary counter has no limit for counting. So, there is a reset button provided to reset the counter to the initial state, restarting at 0

• It detects the clockwise and counterclockwise rotation
• The number of steps in 360°: 20 steps
• Button in the knob
• Module dimensions: 32 x 15 mm

• 1 x Rotation Sensor
• 1 x 5-pin custom connector jumper wire

The GY-271 is supposed to have an HMC5883L, but some boards have a QMC5883L which has the same basic capability, but is not compatible with the H. The GY-271 QMC5883L 3-axis Electronic Compass Module Magnetic Field Sensor is designed for low field magnetic sensing with a digital interface and it is perfect to give precise heading information. If you get a GY-271 board and observe an I2C address of 0x0C and read back nothing but zeros from the board, then you probably have a QMC5883L chip! 

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).

In our Multirotor category you will find different multirotor components, to check out more multirotor controllers click on the following category,

Multirotor Controller

HMC5883L and QMC5883L module don’t have too much difference. HMC5883L is made by Honeywell. but because the production is about to be stopped, so we use a similar compass module-QMC5883L instead. QMC5883L is made by a Chinese company, they get the production authorization of HMC5883L from Honeywell, and rename it QMC5883L. So QMC5883L and HMC5883L basically are the same, they shares the same hardware design. Just their register is a bit different. We only need to change the software a bit.

• 3-axis magnetic electronic compass.
• Precise heading information.
• Fits into small projects easily.
• I2C communication.

• 1 x GY-271 QMC5883L 3-axis Electronic Compass Module
• 2 x 5 * 1 Male Burg Connectors

This LM393 Photosensitive Light-Dependent Control Sensor LDR Module is using a high-quality LM393 voltage comparator. Easy to install using the sensitive type photosensitive resistance sensor the comparator output signal gives a clean and good waveform.

Driving ability is 15mA with the adjustable potentiometer, it can adjust the brightness of the light. Working voltage is 3. 3V to 5v. Where output is a digital switch output. Since this module is sensitive to the light, usually used for detecting the ambient brightness and light intensity.

You can use this board digital output DO port drive relay module directly(our store on sale these relay modules), and can also use as a photoelectric switch. The analog output ao connects with ad module and it can get more precise light intensity value through the ad-converter.

Interface Pin :

• VCC: Positive power supply
• GND: Ground
• D0: Digital output signal
• A0: Analog Output Signal

• It comes with Mounting Hole Screw
• Easy to install
• Signal output indicator light.
• LDR module 4 PIN
• Able to detect ambient brightness and light intensity Adjustable sensitivity (via blue digital potentiometer adjustment)
• Output: DO digital switch output (0 and 1), AO analog voltage output Compatible with Arduino, Raspberry, and other microcontroller board

• 1 x LM393 Photosensitive Light-Dependent Control Sensor LDR Module

A sound sensor is defined as a module that detects sound waves through their intensity and converts it to electrical signals.

The sound detection sensor module for Arduino detects whether the sound has exceeded a threshold value. Sound is detected via microphone and fed into an LM393 op-amp. The sound level set point is adjusted via an onboard potentiometer. When the sound level exceeds the set point, an LED on the module is illuminated and the output is sent low.

Specifications :

• Operating voltage 3.3V-5V
• Outputs digital switching output (high and low levels 0 and 1
• Operating current (Vcc=5V): 4-8mA
• Microphone sensitivity (1Khz): 52-48dB
• Microphone Impedance: 2.2KΩ
• Microphone Frequency: 16-20Khz
• Microphone S/N ratio: 54dB
• Signal output indication
• Single channel signal output
• Outputs low level and the signal light when there is sound

• 1 x Sound Detection Sensor Module

LM386 is an audio power amplifier with features of low power consumption, adjustable voltage gain, wide voltage power supply, fewer requirements on peripheral components, and minimum total harmonic distortion. LM386 can be applied to consumer products with low voltage requirements. To minimize the number of peripheral components used, the voltage gain should be set to 20.

In the case of working with an MCU:

• VCC ↔ 3.3V ~ 5.3V
• GND ↔ power supply ground
• AOUT ↔ MCU.IO (analog output)
• DOUT ↔ MCU.IO (digital output)

Specifications :

• Operating voltage 3.3V-5V
• Outputs digital switching output (high and low levels 0 and 1
• Operating current (Vcc=5V): 4-8mA
• Microphone sensitivity (1Khz): 52-48dB
• Microphone Impedance: 2.2KΩ
• Microphone Frequency: 16-20Khz
• Microphone S/N ratio: 54dB
• Signal output indication
• Single channel signal output
• Outputs low level and the signal light when there is sound

• Audio amplifier
• Ambient sound detection
• Sound level detection

• Onboard audio power amplifier LM386
• Audio signal gain up to 200
• Adjustable accuracy
• Signal output indicator

• 1 x Sound Sensor
• 1 x 4-pin custom connector jumper wire

This is an Analog Sound Sensor Microphone Module for Arduino. Some Applications like interactive voice switch and loudness level indicator is very suited for this module.

• Detectable sound signal size
• Built-in filter-rectifier circuit, DC signal output
• Good sensitivity, built-in amplifier circuit, adjustable gain
• Voltage signal for sound intensity can be obtained by AD conversion
• Analog voltage signal output, signal amplitude VCC/2
• Compatible for Arduino sensor interface

• 1 x Analog Sound Sensor Microphone Module for Arduino

This is a Sound Sensor Microphone Module. Some Applications like interactive voice switch and loudness level indicator is very suited for this module.

• There is a mounting screw hole 3mm
• 5v DC power supply
• With analog output
• There are threshold level output flip
• Power indicator light
• The comparator output is light
• High Sensitivity Sound Microphone Sensor Detection Module
• Electric condenser microphone
• Low-level output signal used for sound control light

• 1 x Analog Sound Sensor Microphone Module for Arduino

Sound Detection Module Sensor for Intelligent Vehicle Compatible With Arduino is a Single channel signal output Sensor. The output is effective to the low-level sound signal with good fidelity, When there is sound, outputs low level and signal light.

It can be used for Acoustic control light, give sound and light alarm working with the Photosensitive sensor, and sound control, sound detect. (The Maximum induction distance is 0.5M)

Note: This sensor only recognizes the availability of sound (vibration principle) cannot identify the size of the sound or the specific frequencies of sound.

• Uses LM393, Electret condenser microphone
• Signal output Indication
• Single channel signal output
• The output effective signal is low level
• Can detect the intensity of the sound environment
• With the retaining bolt hole, convenient installation

• 1 x Sound Detection Module Sensor

LM393 Sound Detection Sensor Module for Arduino detects whether the sound has exceeded a threshold value. The sound is detected via a microphone and fed into an LM393 op-amp.

The sound level setpoint is set via an onboard potentiometer. When the sound level exceeds the setpoint, an LED on the module is illuminated and the output is sent low.

Note: This sensor only recognizes the availability of sound (vibration principle) cannot identify the size of the sound or the specific frequencies of sound.

• Signal output indication
• The output is digital
• Single-channel signal output
• With the retaining bolt hole, convenient installation
• Output low level and the signal light when there is sound

• 1 x LM393 Sound Detection Sensor Module