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Electronics Coursework Aim: For my project I plan to build a moisture detector which can be used too see if the ground on the cricket crease is too moist or dry. It will measure the level of water in the ground and show the moisture level by lighting a different LED. So if it was a hot day with less water in the ground the moisture detector will only light up a green LED, then as the water in the ground increased another LED will light. Yellow for when the moisture level is in the middle of the scale and red for when the ground is too moist and so unsuitable to play any cricket. The first sub-system to consider is the input. I will put two contacts in my circuit so the processor can compare the resistance of the water. The second is an Op-Amp so as the...

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