I am trying to switch on a LOAD from its OFF state by detecting a change in the voltage. Here the load is a MOT(Microwave Oven Transformer), the voltage at the primary is 1VAC when OFF. My idea is to switch ON the MOT by detecting the voltage change at the primary when the Secondary are shorted when in the OFF state. I can see a voltage drop of .5VAC when shorted. How can i monitor this voltage change with an Arduino.
I hear this would be possible by level shifting the voltage to a range that an Arduino can handle but i am not sure how to handle the high voltage at the primary when the MOT is switched ON.
Below is one such circuit for level shifting a voltage, but not sure how i could use it with the ac Mains.
I hear this would be possible by level shifting the voltage to a range that an Arduino can handle but i am not sure how to handle the high voltage at the primary when the MOT is switched ON.
Below is one such circuit for level shifting a voltage, but not sure how i could use it with the ac Mains.
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