Using a Multimeter

I powered Arduino with USB cable from my Laptop and I connected 5v of arduino to the positive rail of a breadboard and I connected GND of Arduino to negative rail of the breadboard. Next I put an LED on the breadboard and I connected 470 ohms resistor to the anode of LED so it doesn't blow up and I put another LED and its anode is going from the first LED's cathode and the second LED's cathode is going to negative rail.

First I measured resistance by tu4ning the Multimeter knob to resistance. To do that, I put 3 resistors  of 458 ohms, 968 ohms, and 2.12 kilo ohms on the breadboard, out of my circuit and measured it by the multimeter.

Secondly I measured current going across the LED by inserting the multimeter inbetween the circuit and turning the multimeter knob to DC Amperes. The current going from the resistor to the LED was 2.18 mA.

Lastly I measured voltage. To measure voltage going through a component we put the component between the positive and negative terminals of the multimeter. The voltage going through the arduino is 5.13 volts,  1.07 volts going through the resistor, 1.95 going through the first LED and 1.98 volts going throght the second LED.

Q. How can I measure current, voltage and resistance accross a circuit?

     Ans. We can measure current by a multimeter

Click this link to check the video:

YouTube video, Using Multimeter