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  • How to drive a relay from a digital pin, two solutions

    How to drive a relay from a digital pin, two solutions

    The first is by using an NPN-transistor, and the second a N-channel-MOSFET. Both circuits are pretty much the same otherwise.
  • Basic electrical engineering for hobbyist, areas of interest, and basic concepts

    Basic electrical engineering for hobbyist, areas of interest, and basic concepts

    Electrical engineering is a field that deals with the study and application of electricity, electronics, and electromagnetism. Some basic concepts in electrical engineering include circuit analysis, electrical power, and electrical machinery. Areas...
  • How to create a power limiter to get zero-on-the-meter to save taxes

    How to create a power limiter to get zero-on-the-meter to save taxes

    If you are one of the many people exporting electricity to the grid, chances are you are familiar with the following… When you export electricity you also get to pay energy taxes...
  • How to create a smart switch for an electric boiler to save money

    How to create a smart switch for an electric boiler to save money

    My electric water heater consumes a lot of electricity, and it does so at times when it is most expensive. This is because I have dynamic prices which change every hour and...
  • Power grid

    Power grid

    The power grid is a complex system that delivers electricity from power plants to homes and businesses. It is made up of three main components: generation, transmission, and distribution. Generation refers to...
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