![]() If not, then there’s something along the circuit that’s causing a problem-find it! This simply tests whether or not a circuit is complete by sending a very small amount of current through the circuit and seeing if it makes it out the other end. Continuity: Usually denoted by a wave or diode symbol.Resistance (Ω): This measures how much resistance there is in the circuit. The lower the number, the easier it is for the current to flow through, and vice versa.This setting is used to measure the voltage from alternating current sources, which is pretty much anything that plugs into an outlet, as well as the power coming from the outlet itself. Alternating Current Voltage (ACV): Sometimes it will be denoted with a V~ instead.This setting is used to measure direct current (DC) voltage in things like batteries. Direct Current Voltage (DCV): Sometimes it will be denoted with a V– instead.In any case, here’s a rundown of what each symbol means on my multimeter: There’s a lot going on when you look at the selection knob on a multimeter, but if you’re only going to be doing some basic stuff, you won’t even use half of all the settings. ![]() It can also measure frequency and even temperature. It comes with an auto-ranging feature, which means you don’t have to select a specific number value and worry about it being too high or low. Or you can spend a bit more cash and get something fancier, like this one from AstroAI. You can get something basic like this $8 model, which comes with everything you would need.
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