Electronics is defined as the branch of physics and technology concerned with the design of circuits using transistors and microchips, and with the behavior and movement of electrons in a semiconductor, conductor, vacuum, or gas.
Having known its definition, electronics as dealing with semiconductors, transistors, chips and any other electronic devices include its scope the parameters and the values already determined in a certain component. In a particular circuitry, you can't just directly tell the definite value of a component until you measure it- unless if the values are pre-determined and labeled in the components' chassis.
Electronics has been widely known and spread already throughout the world. As it is the backbone and the skeleton of every innovating technology then and now, it is a necessity for us that at least we could know about the basics of its innovation- to know the measuring devices so essential as needed to determine the values of each components present in a particular circuitry.
"But how can we measure and check predetermined component values?"
This blog introduces you to an informative approach regarding the world of electronics and its basics- what instrument to be used in determining pre-specified values as kept on mentioned above, their different kinds and of course their comparison.
Central to the functioning of the analog multimeter is the D’Arsonval galvanometer. This consists of a coil carrying a current attached to a rotatable drum. Two permanent magnets are placed on either side of the coil. As current flows through the coil, a magnetic field forms around it. This magnetic field interacts with the magnetic field of the permanent magnet, so whenever the current flowing through the coil changes, the drum rotates. A needle is attached to the drum, which moves along the reading scale. An analog multimeter primarily measures current. Measurements of voltage and resistance are first converted to a corresponding current, which is then indicated by the needle.
In older digital multimeters, the type of measurement as well as the range needs to be selected manually. Most new digital multimeters have an auto ranging feature. However, users still have the ability to manually select the range (this is especially useful when measuring values that change by large amounts periodically).
• Input resistance of digital multimeter is constant for all the ranges to be measured unlike analog multimeter.
• It measures with accuracy better than analog multimeter as analog multimeter is prone to errors due to wrong pointer based reading.
• The highest frequency of analog multimeter using rectifiers on AC range is about 2KHz. For digital electronic multimeter this range is higher than analog type.
• The comparison between analog and digital meters comes down to one word: precision. Most situations call for as precise a reading as possible, making a digital meter the better choice. However, instead of a single precise reading, some instances call for finding out a range of readings, making an analog meter the better choice.
