Technical Editor, Author at Polytechnic Hub

Block diagram of digital storage oscilloscope

The block diagram of digital storage oscilloscope is shown in above figure. In this method, the waveform to be stored is digitized, stored in a digital memory and retrived for…

Technical Editor October 6, 2017

Electronics Articles

What is ohmmeter?

The ohmmeter is a convenient direct reading device for measurement of resistance. The purpose of an ohmmeter is to measure the resistance placed between its leads. This resistance reading is…

Technical Editor October 5, 2017

Electronics Articles

The optical transducer convert light into electrical quantity. They are also called as photoelectric transducers. The optical transducer can be classified as photo emissive, photoconductive and photovoltaic transducers. The photo…

Technical Editor September 11, 2017

Electronics Articles

Advantages and disadvantages of electronic multimeter

There are some advantages of electronic multimeter which are given below, The input impedance is high. The frequency range is high. The construction is rugged. The circuit is simple. It…

Technical Editor September 9, 2017

Electronics Articles

Conduction of current through P type semiconductor

When we connect a battery across a P type semiconductor let us see that what happens. The free electrons and holes experience the force towards the battery terminals. The free…

Technical Editor September 6, 2017

Electronics Articles

Conduction of current through N type semiconductors

Let us see what happens if we connect a battery across an N type semiconductor as shown in below figure. The free electrons and holes experience the force towards the…

Technical Editor September 1, 2017

Electronics Articles

Temperature effect on conductivity

An intrinsic semiconductor at absolute zero, behaves as a perfect insulator. The amount of energy required to break a covalent bond is 0.72 eV in case of germanium and 1.11…

Technical Editor August 29, 2017

Electronics Articles

Advantages, disadvantages and applications of piezoelectric pressure transducer

There are some advantages of piezoelectric pressure transducer which are given below, Rugged construction and small size. Excellent frequency response. High output with negligible phase shift. There are some disadvantages…

Technical Editor August 28, 2017

Electronics Articles

Capacitor testing with ohmmeter

Three capacitor defects are detectable with an ohmmeter are short, open and partial short. If the capacitor is in a ciruit, it must be separated by disconnecting one lead. The…

Technical Editor August 26, 2017

Electronics Articles

Types of logic analyzer

There are two types of logic analyzers which are given below, Logic timing analyzer Logic state analyzer Logic timing analyzer : In this device, the data is sampled according to…

Technical Editor August 25, 2017