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

    Guitar phaser effect
    Acid rain monitor
    RC audio oscillator with 555
    High frequency analog switch
    10 Watt TDA2002 Amplifier Circuit
    rear wheel tachometer
    led dimmer circuit
    Battery Tester For Deaf and Blind Persons
    The current loop interface circuit diagram of AD694 being used as D / A converter
    2x16 LCD and 4x4 keypad example
    16 Step Analog Sequencer circuit
    12V battery production controller
    FET relay circuit 2