Gravity: IO Expansion Shield for Arduino V7.1

This air purifier uses a HEPA filter to remove viruses, bacteria, mould, dander, etc. safely. The dehumidifier regulates humidity in the bathroom, kitchen, etc. Filters up to 99.5% of dust, pollen, tobacco smoke, mould spores and pet dander. Keeps the environment clean.

EMG Muscle Signal Sensor Signal Electromyography features:
EMG Muscle signal sensor module kit with 6 disposable electrodes The EMG sensor serves as a bridge to detect small electrical pulses product of
muscle activity and transform them into a signal recognizable by Arduino. NOTE: DO NOT USE THIS SENSOR FOR MEDICAL PURPOSES.
Code Examples: https: //github.com/AdvancerTechnologies/MuscleSensorV3

This board features and extremely low power LIS331HH accelerometer. The unit is a MEMS three axis linear accelerometer with a I2C- SPI serial interface enabling use with embedded applications. The range of measurement includes three options +-6g/+-12g/+-24g and enables datalogging with output rates fro 0.5 Hz to 1kHz. Check this and plenty of other accelerometers in our offering of both Sparkfun and other producers

The Grove - Air Quality Sensor v1.3 is designed to test indoor air quality. It can react to carbon monoxide, alcohol, acetone, paint thinner, formaldehyde and other slightly toxic gases. Compatible with 5V and 3.3V power supplies, it can work with Arduino and Raspberry Pi. It features long-term stability and low power consumption. It's the ideal choice for monitoring air quality in your projects.

Ethanol alcohol sensor module.
MQ gas sensor uses a small indoor heater with an electrochemical sensor.
When the alcohol molecules in the air comply with the electrode the ethanol "changes" into acetic acid and then more current is produced.
MQ-3 Alcohol Sensor Module Ethanol Breathalyzer features:
- Main chip: alcohol sensor MQ-3 and comparator LM393
- Working voltage: 5V
- Current: 150mA
- Digital output: TTL 0/1
- Analog output: analog voltage sensing value
- Detection concentration:
- 0.05mg/L - 10mg/L
- Quick response features:
- Adjustable sensitivity with the potentiometer
- Size: 32mm x 20mmx 18mm

Sensor used to measure the current in the circuit to which it is connected. Characteristic: - Output: Analog
- Power: 5V
- Accuracy: 1.5%
- Measuring capacity: +/- 30A
- Dimensions: 31 x 13 mm

Ultrasonic sensors overcome many of the weaknesses of IR sensors by providing distance measurement regardless of the color and illumination of obstacles. Ultrasound Distance Sensor HC-SR05 features:
- Power supply: 4.5-5.5 VDC
- Supply current: 10 to 40 mA
- Activation pin format: 10 μs digital pulse
- Echo Pin Output: 0-Vcc
- Echo Pin Format: the output is DIGITAL and directly proportional with range. See our conversion formula below
- Measurement range: 2cm to ~ 4.5m
- Measurement resolution: 0.3cm
- Measurement angle: up to 15 degrees
- Measurement speed: 40 Hz,
- Connector: standard 5-pin male connector that can be connected directly to boards or breadboards:
- 1: VCC
- 2: Trig
- 3: Echo

Mini electricity generator, built base on a turbine and an electric generator that converts kinetic energy into electricity. The generator output is rectified and regulated for a maximum of 12V. Please note -if we want to generate more current, the turbine will oppose the greater resistance to the flow of water, and the voltage may drop if the water flow is not sufficient. This generator is made of plastic and the turbine is totally isolated from the generator and rectifier, the outputs are 1/2 "usually found in domestic pipes.

Definition of the Hall effect: When a current passes through a bar of semiconductor (or conductive) material, and if an induction magnetic field B is applied perpendicularly to the direction of current flow, a voltage, called the Hall voltage, proportional to the magnetic field, and the current appears on the side faces of the bar.
This voltage is proportional to the speed of movement of the charge carriers, It is considerably higher in semiconductor materials than in metal conductors. Magnetic Sensor Characteristic: - Input Voltage: 3.8-30VDC - Output current: 40mA
High output current capacity -40 mA maximum absolute
Quad-Hall design virtually eliminates static mechanical effects
Magnetic compensated temperature - Digital current sinking output

Sensor used for measuring of the object acceleration in 3 axis in the range of either ±2g, ±4g or ±8g. It is powered with 1.95V to 3.6V. What sets this module apart is its user-friendliness, compatible size and low power consumption. it comes with headers attached