Rechargeable Battery Samsung INR18650-35E 3500mAh Li-ion - Box 2pc

It consists of three principles of induction of primary colors, if you know the composition of all types of color values, you can know the color of the test object.
For TCS230, a color filter is chosen, only a certain primary pass is allowed, it is stopped by another color. For example, when choosing a red filter, the incident light can only be stopped in red, blue and green, so you can get the intensity of the red beam of light.
For the same reason, the choice of other filters, can obtain the intensity of blue light and green light.
Through these three values, the color of the light can be projected onto a TCS230 sensor. Color Recognition Sensor GY-31 TCS230 TCS3200 features:
- Operating voltage: 3 - 5 VDC
- Model GY-91
- Chip TCS230 TCS3200

Power supply module step up with fixed output 5 VDC accepting a maximum current of 2A.
Works with frequency signals up to 1.2 MHz.
Characteristic:
- Input voltage range: 2 - 5 VDC,
- Fixed output voltage: 5 VDC,
- Output accuracy: ± 0.1 V,
- Maximum output current: 2A,
- Ripple at full load: Vpp & lt; 70mV,
- Operating temperatures: -40ºC - + 85ºC,
- PCB size: 17x13mm.

High sensitivity to Ammonia (NH3), Nitrogen oxides (NOx), Alcohol, Sulphides, Benzene (C6H6), CO2, smoke and other harmful gases.  The MQ-135 sensor is to sensible for other gasses in the air so that is not possible to get good values for CO2 from it.
MQ-135 Air Quality Sensor features:
- Main chip: MQ-135 natural gas sensor and comparator LM393
- Working voltage: 5V
- Current: 150mA
- Digital output: TTL 0/1
- Analog output: analog voltage sensing value
- Quick response features:
- Detection concentration:
   10ppm - 300ppm NH3
   10ppm - 1000ppm Benzene
   10ppm - 300ppm Alcohol
- Adjustable sensitivity with the potentiometer
- Size: 32mm x 20mmx 18mm

Charger 2x18650 with EU Plug Cable features:
- This product is very convenient and easy to use
- Black
- Material: metal and plastic
- Weight: 74g
- Input voltage: AC 100 -240 V 50/60 Hz
- Compatible with: 18650 Li-ion
- When the 18650 battery is connected to the charger, the red LED light will be displayed, and means green in full charge status
- Output: DC 4.2 V, 1A
- Plug: EU plug
- Cable length: 38cm
- The battery are not included

3-axis analog accelerometer module based on the MMA7361 sensor. The built-in sensor has a low demand for electricity. The measuring range of the sensor can be changed between two ranges ± 1.5 g and ± 6 g. The selection is made using a digital input or welded bridges.
MMA7361 Triple Axis Analog Accelerometr features:
MMA7361 3-axis analog accelerometer Supply voltage: 3.3 - 5 V (built-in RT9161 chip) Measuring range selected from the IO line of the microcontroller or via bridges Comparators with hysteresis for CMOS / TTL 3.3 V, 5 V inputs Pin pitch: 2.54 mm Dimensions: 28 x 17 mm.        Helpful links - MMA7361 datasheet

Detects changes in the sensor angle and returns to the digital value. 5x SW-520D Vibration Metal Tilt Sensor features:
- Contact resistance:

This module includes the BMP280 component that converts atmospheric pressure, temperature and humidity with high precision into a digital signal.
The equipment uses the two I2C and SPI interfaces. The very good measurements made by the BMP280 allows the module to be used as an altimeter.
Its 5-pin straight connector allows easy connection to other electronic boards. BMP280 Temperature Barometric Pressure Sensor Module/SPI features:
- Interfaces:
       -I2C (up to 3.4 MHz)
       -SPI (up to 10 MHz)
- Supply voltage: 1.8-5VDC
- Module operating range:
       - Temperature: -40ºC to + 85ºC
0-100%
       - Pressure: 300-1100 hPa
- Resolution of the measures:
       - Temperature: 0.01ºC