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Arduino

Portable magnetometer

A magnetometer, sometimes also called a gaussmeter, measures the strength of a magnetic field. This is an important tool for checking permanent magnets and electromagnets and for understanding the shape of the configuration field.
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A cat watch meowing every hour

If you have a clock in the form of a cat, using the microcontroller you can add another function to them - to make meow every hour. And how - says the author of Instructables under the nickname prazors. From
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DIY binary clock

a master from Norway likes the way of determining the time with binary code. Surprisingly, the amount of information can be displayed in simple ON / OFF signals. Then the master decided on his own
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