For this week, we tested the 5mA current sensor. The current sensor requires a reference voltage of 2.5V. To get the reference voltage, we used the 5V output and pass through a voltage divider formed by 2 resistors of any same value. The output will be determined by the current flowing through the circuit. We tested the highest and lowest current and it verified the range stated on the sensor of 2.5 +/- 0.625V. Input of current is firstly done by a 9V battery, followed by a portable power supply.