# Basic PLC program for control of a three-phase AC motor (for beginners)

While the lighting control system previously discussed is useful to explain basic PLC operation, a more practical, and only slightly more complex, application is start-stop control of an AC motor…. Read more

Dec 25, 2015 | Edvard

# The Mesh Current Method For Analysis Of Electric Circuits

The mesh current method of circuit analysis discussed in this technical article employs mesh currents as the independent variables. The idea is to write the appropriate number of independent equations,… Read more

Nov 25, 2015 | Edvard

# The Node Voltage Method For Analysis Of Electric Circuits

Node voltage analysis is the most general method for the analysis of electric circuits. In this technical article, its application to linear resistive circuits is illustrated. The node voltage method… Read more

Nov 02, 2015 | Edvard

# Basic measuring devices explained through cute simple schemes

In this technical article, you should gain a basic understanding of the desirable properties of practical devices for the measurement of electrical parameters. The measurements most often of interest are… Read more

Oct 21, 2015 | Edvard

# 10 Important Definitions Applied To Low Voltage Fuses

The simplest of all overcurrent protective devices are fuses. A fuse is an overcurrent protective device with a circuit-opening fusible part that is heated and severed by the passage of the… Read more

Oct 10, 2015 | Edvard

# Voltage Drop Calculations For Engineers – Beginners

Voltage drop calculations using the DC-resistance formula are not always accurate for AC circuits, especially for those with a less-than-unity power factor or for those that use conductors larger than 2… Read more

Sep 19, 2015 | Edvard

# PLC Latch (Flip-Flop) Logic Function – Like a Sticky Switch!

More complex systems cannot be controlled with combinatorial logic alone. The main reason for this is that we cannot (or choose not to) add sensors to detect all conditions. In… Read more

Aug 24, 2015 | Edvard

# Kirchhoff’s Laws For Electrical Engineers – Beginners

Two extremely important principles in electric circuits were codified by Gustav Robert Kirchhoff in the year 1847, known as Kirchhoff’s Laws. His two laws refer to Voltages and Currents in… Read more

Aug 19, 2015 | Edvard

# Few advices for improving integrity of protective conductor

Most modern electronic equipment uses switched mode power supplies (SMPS) which draw pulses of current from the mains supply rather than a continuous sinusoidal current. The fast rise time edges of the… Read more

Aug 14, 2015 | Edvard

# Practical Considerations of Transformer Heat and Noise

In addition to unwanted electrical effects, transformers may also exhibit undesirable physical effects, the most notable being the production of heat and noise. Transformer noise is primarily a nuisance effect,… Read more

Jul 31, 2015 | Edvard