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A tank circuit, also called tuned circuit, resonant circuit, or LC circuit, is a circuit consisting of an inductor and a capacitor. The circuit can act as a resonator, storing energy oscillating at the circuit's resonant frequency.

6 votes

Water level monitoring: simplest way

Consider something simpler made from just switches. From each switch lever, suspend a float on a fixed length thread/light chain. When the water is high enough, the float releases the switch. When w …
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