![using a multimeter to test serial connection using a multimeter to test serial connection](https://www.pjrc.com/teensy/td_tutorial_04b.jpg)
Place the red lead on the positive terminal and Black Lead on the Negative terminal and you will get the value of Voltage. Once we have set the meter we can simply place the probes on the terminals on which we have to measure the voltage. In the below picture I have set the meter to read DC Voltage that is within 20V range. For example if you are measuring 35V and if you place it at 20V range then you meter will read simply read 1, this means that you should select a high voltage range in this case 200V. And don’t worry it is not going to blow up if you select a lesser range you can always hit and try. Based on the voltage level that you are planning to measure you can select the range. By default the range will be like 200mV, 2V, 20V, 200V and 600V. We should look for the DC voltage symbol (shown in picture below) and select a range under it.
![using a multimeter to test serial connection using a multimeter to test serial connection](https://i.ytimg.com/vi/_aedd8SUBgY/maxresdefault.jpg)
Now we have to select the Mode by using the regulator like knob in the centre of the multimeter. So, to measure a voltage the black test lead should be in COM slot and red lead should be in V slot.
![using a multimeter to test serial connection using a multimeter to test serial connection](https://i.ytimg.com/vi/JTqx54x1Rso/hqdefault.jpg)
This position will change only if we are measuring current. By default the position of black test lead should be in the COM slot and the Red test lead should be in the V slot. They are the Position of Test Leads (a.k.a test probes) and selection of mode/range. There are two things to check on a multimeter before proceeding with any measurement.
#Using a multimeter to test serial connection how to#
How to Measure DC Voltage with Multimeter: Our Multimeter can measure both AC and DC voltages. All most all electronics devices work on DC voltage (Conventional AC will be converted to DC) and hence DC voltage is the most measured parameter. One is DC voltage and the other being AC Voltage. There are two different Voltages in general that can be measured by the Multimeter. Hence sit back and read through, while I will try making this article as intresting as possible. sounds like a big list isn’t it! But trust me they will be very useful when you are trying out stuff on your own. At the end of this article you will learn how to measure voltage with multimeter, measure DC current, check for continuity, measure resistance and also check if few components like LED and diodes are in working state. In this article we will learn how to use a digital multimeter and how this will help us in our journey with electronics, this will be a very basic article which will take your through the different operations of a multimeter will illustrative pictures and videos. Perhaps this would be the first instrument that we get introduced to when starting to explore things related to electronics. Just like stethoscope for doctors, stack overflow for programmers, spanners for Mechanic and Jarvis for Tony Stark a Multimeter is a very essential instrument for engineers who are interested in working with electronics.