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What is the current range?
1. measure the voltage drop across a resistor in series with the load - simple ohms law, a 1 ohm resistor will drop 1V for every amp of current. it's usual to use a smaller resistor and amplify the voltage drop with an opamp - this also allows you to reference the voltage to 0V (by using a differential opamp circuit).
Use ADC to convert -> microcontroller->output to LCD
For idea:-
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https://www.edaboard.com/threads/168925/