Mains frequency display

I’ve had this planned for a while. The concept is to display the frequency of the UK mains electricity supply. This is meant to be 50Hz, but the frequency actually fluctuates around this value, as a result of changes to supply and demand. If the frequency drops, it’s because demand has risen and/or supply has dropped, so generators have to work harder. This slows then down a bit, and the control systems tak ...

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