WEEK 7

DEVELOPMENT OF CURRENT CIRCUIT

This is the development of current circuit to interface with an Arduino.  The measurement shown above is 5.05 Volts is the input from Arduino. This measurement value is proved the circuit is working 100% without any problem.

In addition, Arduino can only handle voltage (between 0V and 5V) so i need to add 2.5V to U(sensor) to make the voltage measurable. I need to convert this current into an acceptable voltage. So I'm  added a 33 ohm burden resistor in the circuit.  As the current is alternative around 0 and to maximize measurement resolution, the max voltage at burden resistance should be (Max_accepted_voltage / 2) = 2.5V.  The measurement 2.42 Volts is correct.