Flow sensors

The meter built on the basis of a water rotor and a Hall effect sensor
Please note this is not a Accuracy. Pulse rate varies slightly depending on flow rate, fluid pressure, and sensor orientation. Water Flow Sensor 1-30l /Min YF-S201 features:
- Working voltage range: DC 5 ~ 18 V
- Allow pressure: water pressure below 1.75Mpa
- Accuracy (flow-pulse output): ± 1 ~ 30 l / min
- Use temperature: ‰ ¤ 80 ° C
- Load capacity: ‰ ¤ 10 mA (5Vdc)
- Operating humidity: 35% ~ 90% RH (frost free)
- Temperature: -25 ~ + 80 ° C
- Outlet diameter: 1/2 "
- Red wire: positive supply
- Wire Black: negative power supply
- Yellow Cable: signal output
- Color: black
- Size: 6.2x3.6x3.4 cm

12VDC plastic solenoid valve. Normally closed. Liquid can flow in one direction and a minimum pressure of 0.02Mpa (3 PSI) is required. This liquid valve would be a great addition to your robotic gardening project. There are two 1/2 ″ outlets. Normally, the valve is closed. When 12VDC is applied to the two terminals, the valve can be opened and pushed.

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.

The Arduino turbidity sensor SEN0189  detects water quality by measuring turbidity levels. It can detect suspended particles in water by measuring the light transmittance and the scattering coefficient, which changes with the amount of total suspended solids (TTS) in the water.

DFRobot Gravity: The V2 analogue pH meter is specifically designed to measure the pH of the solution and reflect the acidity or alkalinity. The DFRobot ph sensor is commonly used in various applications such as aquaponics, aquaculture and environmental water testing.

The pH is a value that measures acidity or alkalinity.

GamePad for micro:bit V4.0 adopts a high-precision three-axis analog quantity joystick. The combination of joystick and gamepad allows you to control the direction and speed of Maqueen at the same time. In addition, there are 7 programmable buttons, which means you can explore more interesting functions and more flexible controls. In the latest V4.0 product, we have placed the external battery box on the PCB, which is more convenient to use.

Six cases of fun in one kit: kids can build 6 shapes, including traffic lights, brick car, temperature-controlled fans, smart desk lamp, windscreen wiper and trebuchet.

Building with this kit is just as easy as building with Lego.

Note: the micro:bit board is not included, you can buy it separately.

ELECFREAKS Smart Science IoT Kit is developed on the basis of loT:Bit, a new breakout board compatible with ultrasonic sensor, dust sensor, light sensor and water level sensor, including RTC Timing and WIFI module. It can build the scene such as air quality monitoring, environmental noise detection, environmental quality monitoring station, automatic watering detection, self-defence monitoring station and more.

NEZHA inventor kit for micro:bit develop your imagination and creativity with the Nehza 36-in-1 kit for micro:bit.

With the micro:bit Smart Health Kit you will build items such as UV light detections, sitting posture reminder, alcohol detector, smart bin and more, from which we can learn how to program and how to maintain healthy living habits in a scientific way.