The fine dust sensor uses SHARP’s GP2Y1014AU0F. You can use anything compatible. Micro:bit only works with v2.00 or later products. Please use the Chrome browser if possible. It may not work in the in-app browser of social media (e.g. Facebook). … more
A solid metal can be made by grouping several hot gaseous (monatomic) metals together. What is the difference between emission spectra in the gas (monatomic) and solid state? The simulation above is a simple example and is not representative of … more
A cathode ray tube (CRT) is a device that produces cathode rays (a stream of electrons). The inside of the tube is evacuated or filled with a noble gas. When a high voltage is applied to the cathode ray tube, … more
Let’s assume there is a light source in the middle of the train and sensors on both sides to detect the light. From the point of view of an observer inside the train, the two light sensors are the same … more
Movement on the pulley Two objects are connected by a string on a fixed, frictionless pulley and are moving together. In this case, the mass of the string and pulley is ignored. Since tension \(T\) and gravity \(g\) act in … more
You can measure the voltages between 0 and 16.5V with micro:bit. The voltmeter must be supplied with 5V USB power. Do not measure excessively high voltages. It can damage the micro:bit. If the voltmeter terminal is not connected, a random … more
Oersted’s experiment Oersted, a Danish physicist, accidentally discovered the occurrence of a magnetic field around a current-carrying wire. Oersted said that he was surprised to see the compass’s magnetic needle placed next to the wire rotate while experiment to show … more
Magnetic field created by electric current The magnetic field is the area surrounding a magnet in which the magnetic force exists. The magnetic field is also formed around the conductor through which the current flows. This is the subject of … more
* If you are asked to access your location, please allow it. * Your personal data is not stored on the server. * For iOS devices, please allow location access as follows. Diurnal motion If you fix your camera to … more
About this program This program combines a servo motor tester and a human-looking robot. A staring robot equals the v1. Check out the previous v1 video to see what kind of robot it is. Parts list The parts list is … more
The three primary colors of light are red, green, and blue. Depending on how these three lights are mixed, different composite colors appear. For better understanding, let’s imagine a three-dimensional coordinate system with the x, y, and z axes. Assuming … more
* If you are asked to access your location, please allow it. * Your personal data is not stored on the server. * For iOS devices, please allow location access as follows. Diurnal Motion Fix the camera towards the Polaris … more