DC Lessons In Electric Circuits


Posted on Feb 5, 2014

A meter is any device built to accurately detect and display an electrical quantity in a form readable by a human being. Usually this `readable form` is visual: motion of a pointer on a scale, a series of lights arranged to form a `bargraph, ` or some sort of display composed of numerical figures. In the analysis and testing of circuits, there are


DC Lessons In Electric Circuits
Click here to download the full size of the above Circuit.

meters designed to accurately measure the basic quantities of voltage, current, and resistance. There are many other types of meters as well, but this chapter primarily covers the design and operation of the basic three. Most modern meters are "digital" in design, meaning that their readable display is in the form of numerical digits. Older designs of meters are mechanical in nature, using some kind of pointer device to show quantity of measurement. In either case, the principles applied in adapting a display unit to the measurement of (relatively) large quantities of voltage, current, or resistance are the same. The display mechanism of a meter is often referred to as a movement, borrowing from its mechanical nature to move a pointer along a scale so that a measured value may be read. Though modern digital meters have no moving parts, the term "movement" may be applied to the same basic device performing the display function. The design of digital "movements" is beyond the scope of this chapter, but mechanical meter movement designs are very understandable. Most mechanical movements are based on the principle of electromagnetism: that electric current through a conductor produces a magnetic field perpendicular to the axis of electron flow. The greater the electric current, the stronger the magnetic field produced. If the magnetic field formed by the conductor is allowed to interact with another magnetic field, a physical...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Tiny RC Cars - Transmitter and Charger
    Charger for 12V lead acid battery
    20- 40W electronic ballast principle and maintenance
    Mathematical approch to measuring current voltage and resistance of mixed series and parallel
    All Transmitter & Receiver schematics
    LED driver based on MP3302 LED driver IC. Working circuit diagram.Operates from a single Lithium ion battery
    Keypad Scan
    Metal Detectors
    LED3X Solar Tracker Assembly
    DF data transmission module and the super-regenerative receiver module
    Nine-digit password composed of the controller circuit diagram CD4017



    Top