Category Archives: Electronics

Electronic Devices – Inductor

An inductor is a coil of wound on a core. An inductor opposes the sudden variation of current. an inductor stores the energy in the form of current in magnetic field. The coil blocks DC inductor allows the Direct current

L=µ o µr A N2/l Henry

  • l=length of the core,
  • µ o=permeability of free space,
  • µr=relative permeability of the core material,
  • A=area of cross-section of the coil, N=length of the core,


Electronics Circuits – Multivibrator


  • Astable multi-vibrator is a simple two state (S1,S2) small electronics device.
  • Its contains two amplifying transistor and cross coupled by resistors or capacitors.
  • During the world was 1, invented the first multivibrator circuit, that is astable multivibrator oscillator, by Henri Abraham (Below Image) and Eugene Bloch during World War I.
Henri Abraham
  • Why called multivibrator
    • its output waveform was rich in harmonics, So its called multi vibrator.


Electronics Simulator – Proteus

Proteus 8.1 Installation

  • Browse for key -> Select Key.lxk
  • Install key
  • Install Proteus 8.1
  • Do not run after installation
  • Copy “BIN” To Instalation Folder (C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional)
  • Copy “MODELS” To ProgramData (C:\ProgramData\Labcenter Electronics\Proteus 8 Professional)
  • Note : If you cant see the program data file in system, enable the show hidden files in folder option
  • Run Proteus and enjoy!
  • Note : USB VSM Simulation now works. Tested in Windows 8.1 x64.



Electronic Devices – Capacitor


A capacitor consists of two conducting plates separated by an insulating medium. The capacitor can store electric charges, in the form of voltage in electric field. The capacitor blocks direct current. The capacitor opposes any sudden change of voltage applied to it. Capacitor only allows the Alternating current. Capacitor makes the time delay

C=Ԑ o Ԑr A / d farad A=area of each plate in m2,

  • d=distance between the plates in meter, Ԑr =relative dielectric constant(permittivity).
  • Ԑ o=dielectric constant(permittivity)of free space,


Electronics Circuit – LED Blink using Astable Multivibrator


      This is simple two LED blink example using astable multi-vibrator circuit. This circuit generate two different not stabled state outputs pulses. We can connect the LED in the two output pulse point and our LED blink easily. This following all instructions given because to help who is beginner in electronics. if you have knowledge skip what you know already.



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