So, let’s have a quick look at the Multimeter with regards to Arduino projects.


When working with the Arduino example projects, you primarily need to know this:

  1. DCV measures the voltage when you apply the red connector to plus (VCC) and the black to minus (GND).
  2. The Ohm part of the resistor is very useful. As you may have noticed, the resistors contain some colored markings used for identifying how big/small the resistor is. This can be measured with the multimeter by connecting the black and red connectors of the multimeter to either side of the resistor and then set the multimeter to measure the right range of Ohms. If the display just shows .1 or something similar, it usually means that the range setting is wrong – then just pick one of the others until you get a proper reading.
  3. Also, if you need to measure the Amps that your project is consuming, you can use the ACV setting. Here it’s important that you connect the multimeter as part of the circuit, so if you have build a battery powered Arduino, then you connect the BLACK connector from the multimeter to plus on the battery and then connect the black connector to the RED raw or vcc wire of your project. This means that your project will be powered through the multimeter. For more info, I can recommend the following wiki-page: Measuring Amps.


What’s next?

Installing the Arduino IDE on your computer… Next post coming up here!