To begin, allow’s measure voltage on a AA battery pack: connect the probe that is black COM additionally the red probe into mAVО©. Set the multimeter to “2V” into the DC (direct present) range. The majority of portable electronic devices use direct present), maybe perhaps perhaps not alternating electric current. Connect the probe that is black battery pack’s ground or ‘-‘ as well as the red probe to power or ‘+’. Squeeze the probes having a pressure that is little the negative and positive terminals associated with AA battery pack. If you a fresh battery pack, you need to see around 1.5V regarding the display (this battery pack is unique, so its voltage is somewhat more than 1.5V).
If you should be measuring DC voltage (such as for instance a battery pack or even a sensor hooked as much as an Arduino) you intend to set the knob in which the V features a line that is straight. AC voltage (like exactly exactly what is released of this wall surface) could be dangerous, so we rarely need certainly to make use of the AC voltage environment (the V with a wavy line close to it). If you are messing with AC, we recommend you receive a non-contact tester as opposed to make use of multimeter that is digital.
What the results are in the event that you switch the red and black colored probes? The reading in the multimeter is just negative. Absolutely absolutely Nothing bad takes place! The multimeter measures voltage pertaining to the probe that is common. just How voltage that is much here in the вЂ+’ regarding the battery pack when compared with typical or the negative pin? 1.5V. We define вЂ+’ as the common or zero point if we switch the probes. Just just just How voltage that is much here in the вЂ-‘ associated with the battery pack when compared with our brand brand new zero? -1.5V!
Now let us build an easy circuit to show how exactly to determine voltage in a world scenario that is real.