Using a multimeter

We can use a multimeter to measure resistance, voltage, and current. It’s a great way to see what’s going on in our circuit. Using a multimeter, we can check our connections and find breaks in the circuit; it tells us when something is broken. Multimeters, as shown in Figure 2.6, come in different sizes and prices. Starting with a low-cost one will be suitable for our circuits. I have a small portable one. They have a dial so that you can select the function you need. A multimeter will have probes that we’ll use to connect to the circuit to take measurements. You’ll notice these are also black and red, following the same convention we’ve been using for our circuits, too. If your probes are removable, make sure the black probe is in the COM port and that the red probe is in the mAVΩ port. Additionally, note that the multimeter uses the convention of red wire for positive/power and black for negative/ground. You should read...