Moisture Sensor for micro:bit

Environment Science Board for micro: bit is designed with highly symbolic trees, houses, and snowy mountains. On a wide and easy-to-use PCB, it integrates many sensor modules of nature and science. Including UV sensor, temperature sensor, humidity sensor, air pressure sensor, sound sensor, color sensor, light sensor, water temperature sensor, TDS water quality sensor, buzzer, OLED display, etc. This kit is rich in knowledge, including a wide range of applications. It is initial to observe and ease to play. Extended GPIOs are set and it supports gravity series sensors. The bottom is designed with PMMA (acrylic） to enhance the ease of use and durability. It supports Makecode and Mind + platforms. Power supply: 3.5V~5V (AAA 1.5V Battery x3)  GPIO: P1, P2, P8, P12, UART, I2C  ML8511 UV sensor  BME280 sensor  TCS34725 color sensor DS18B20 waterproof temperature sensor  TDS water quality sensor   Capacitive soil moisture sensor WS2812-RGB-LED Dimension: 196mm×110.6mm  Programming platform: Makecode and Mind+ 

Es gibt zwei typische Arten von Bodenfeuchtesensoren, den kapazitiven und den resistiven Typ. Der kapazitive Typ misst die durch die Bodenfeuchtigkeit verursachte Kapazitätsänderung, um die Feuchtigkeit des Bodens zu schätzen. Der resistive Typ basiert auf der Messung der Grösse des Widerstands zwischen den beiden Kontakten, um die Bodenfeuchtigkeit zu schätzen. Die strenge Definition der Bodenfeuchtigkeit ist der prozentuale Anteil der Wassermasse im Boden. Daher können weder der resistive noch der kapazitive Typ den Wassergehalt im Boden genau vorhersagen, sondern nur den Messwert, der positiv mit dem Wassergehalt korreliert ist. Der Bodenfeuchtesensor in mBuild ist ein resistiver Typ. Wenn die Bodenfeuchtigkeit zunimmt, kann das Wasser die in einem Teil des Bodens enthaltenen Ionen auflösen, so dass der Widerstand des Bodens kleiner wird und der Messwert des Bodenfeuchtesensors daher größer wird. Wenn der Wassergehalt im Boden weiter erhöht wird (im Extremfall kann man sich vorstellen, etwas Erde ins Wasser zu schütten), wird die Ionenkonzentration im Boden durch überschüssiges Wasser verdünnt, was zu einer Abnahme der elektrischen Leitfähigkeit und einem hohen Widerstandswert führt. Sie werden also feststellen, dass der Bodenfeuchtesensor in reinem Wasser weniger anzeigt als in feuchtem Boden (obwohl ersterer einen wesentlich höheren Wassergehalt hat), weil die Ionenkonzentration im feuchten Boden höher ist und der Widerstand höher ist. klein. Parameter Grösse: 24×72mm Messbereich: 0~100 Genauigkeit: ±5% Betriebsstrom: 14mA

Monitor soil moisture, temperature and relative humidity measurement with the Plant Monitor. This board is compatible with the BBC micro:bit, Raspberry Pi , Pico, Pico W and most microcontroller boards. Alligator / croc clip rings Ready soldered header pins for your choice of microcontroller. Easy to use UART serial interface Additional analog output for moisture only Built-in RGB LED

Description The MonkMakes Sensor Board allows you to detect sound levels, temperature and light levels. It features ring pad connectors for use with crocodile clips make it easy to connect to the board to a microbit. Sound Level:It senses sound level with a MEMs, which is a microphone on a chip that also features a pre-amplifier circuit. You can then use the plot bar graph block in the Microsoft MakeCode editor to display the result on the microbits LED matrix. Temperature Level:The temperature output from the board is a voltage that indicates the temperature. This is then measured using an analog input on the micro:bit. If you want your temperatures in Fahrenheit, then multiply the temperature in degrees C by 9, divide the result by 5 and then add 32. Light Level:The light sensor uses a photo-transistor to measure the light level and produces an output voltage that increases as the light level increases. It has 3V and GND connectors on both sides of the board which make it possible to power another board, such as the Relay Board or Powered Speaker Board. Features: 3V and GND connections can be made from either side and allow you to power a second board such as the MonkMakes Relay Board or MonkMakes Speaker. LED ‘power on’ indicator. Reverse polarity protection. All three sensors are analog and can be connected to pins P0, P1 and P2 using alligator clips. Detects sound level with a MEMs (microphone on a chip) and a pre-amplifier. Uses a thermistor to measure temperature. Light level detection with a photo-transistor (0 to 1023). All three sensors are analog and can be connected to pins P0, P1 and P2 using alligator clips. Contents: 1 x MonkMakes Sensor Board for the BBC micro:bit.

This micro:bit-based expansion board, specially designed for STEAM education, allows students to measure environmental conditions for scientific experiments by using rich on-board sensors that cover all basic aspects of nature and science in daily life, which helps them explore the related science knowledge and understand nature phenomenon. It aims to provide a platform for students to learn science theory with practices and bring science education closer to daily life!  Integrated sensors include UV sensor, temperature sensor, humidity sensor, air pressure sensor, sound sensor, light sensor, water temperature sensor, and a TDS (Total Dissolved Solids) water quality sensor, soil moisture sensor, TVOC, CO2 sensor, etc.   FEATURESV2.0 Update Comes with WiFi-IoT card, support IoT platforms such as IFTTT, ThingSpeak, EasyIoT Supports for the measurements of TVOC and CO2 MicroUSB power supply port, battery holder is welded on the PCB, more convenient for classroom teaching Onboard 4-way RGB lights 1-way motor driver More powerful chip and more IO ports Greatly optimized OLED display program, more convenient and flexible to use The color sensor is removed from the list Product Features Highly-Integrated (14 function modules): atmospheric pressure, temperature, humidity, harmful gases(TVOC), carbon dioxide, ultraviolet rays, light, sound, water quality, water temperature, soil humidity, buzzer, RGB light, OLED display, and motor driver. IoT Function: able to be accessible to famous IoT platforms such as IFTTT, ThingSpeak, and EasyIoT through the WIFI-IoT card. The interesting shape of the tree makes the classroom teaching more vivid and fun.