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https://makecode.microbit.org/S88523-52233-91381-65389

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https://makecode.microbit.org/S02371-99563-75349-74279

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Many times the death of a plant is related to the wrong amount of watering. Experienced plant keepers can tell when they should water by looking at the moisture in the soil. But many people like to keep plants but don't know when to water them. That's why this soil moisture sensor came into existence.

The combination of water and soil nutrients gives the soil some conductive properties. The more water there is, mixed with the nutrients, the weaker the resistance of the soil and the stronger the electric current transmitted. Conversely, the less moisture, the weaker the current. If the current we monitor is too low, then the soil is dehydrated and needs to be watered promptly.

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Made with ❤️ in Microsoft MakeCode for micro:bit.

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Made with ❤️ in Microsoft MakeCode for micro:bit.

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Made with ❤️ in Microsoft MakeCode for micro:bit.

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Made with ❤️ in Microsoft MakeCode for micro:bit.

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Area of Interest: Object Animation

Design intent: My design intent is because many people get bored when they are alone at home, and many people have pets to have a sense of companionship, so this volcano is also designed with this inspiration.

Design Concept and Intended User Experience: The work simulates the moment of a volcanic eruption, the sensor senses an object approaching and activates the servo to push the "magma up", and then resets the process when the object is far away, which is suitable for placing in a corner of the house to enjoy. It's perfect for a corner of your home to enjoy, adding more interactive opportunities to your daily life.

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Sensors activate the servos to push the "magma up" when they sense an object approaching, and reset the process when the object is far away.

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I made this volcano model from recyclable materials, using a courier box and a paper tube as the main body, with a movable wooden stick fixed to the rudder so that the stick would rise or fall whenever the rudder was turned. To prevent the stick from moving around, I stuffed it into a paper tube so that it could make a regular trajectory.

All the wires, Micro:Bit and sensors are fixed on top of the base. Once secured, I made the outer keel out of an ice-cream stick and reinforced it, then made the outer walls of the volcano out of cardboard, finally coloured it and finished it off with a mounting cap.

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This picture is indeed what it looked like when it outbreak...↑

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I was inspired by a trip, to Kilauea Volcano in Hawaii in 2016, the volcano was dormant at the time, so circling the crater and walking in the middle was the closest I got to the volcano, unbeknownst to me, the volcano erupted two weeks later. So I wanted to make this work to commemorate my unforgettable trip.

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A volcano which erupted on Hawaii's biggest island formed a smiley face with its lava, as seen in helicopter footage of the event. The volcano, called Kilauea, has been active since 1983 and showed its joy as its lava reached the Pacific Ocean for the first time in three years. It has been continuously moving on a six-mile journey towards the coast since it began erupting in May.

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Volcano erupts into smiley face in Hawaii as it flows into the Pacific - video

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A volcano which erupted on Hawaii's biggest island formed a smiley face with its lava, as seen in helicopter footage of the event. The volcano, called Kilauea, has been active since 1983 and showed its joy as its lava reached the Pacific Ocean for the first time in three years.

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亲子活动 | 自制火山模型与模拟火山喷发实验 | How to DIY Kids Volcano Diorama & Eruption Experiment