Ideal Transformer

The ideal transformer a is an electromagnetic device that allows us to increase or decrease the alternating voltage and current while maintaining constant power.

Resistor Tolerance. What is it? – Color code

Resistor tolerance is data that tells us the percentage that can vary the resistor value of its proposed value.
This variation may go up or down in the percentage specified tolerance.

XOR logic gate

In digital electronics there are special gates. One of them is the XOR logic gate or exclusive OR gate. Equivalent XOR Logic Gate using common logic gates

Microwaves

At the present time the radio frequency spectrum is becoming small for the growing demand for telecommunications. The incursion into the field of microwaves is natural and we must also take into account that there are some applications that are unique to the microwave frequencies.

Capacitor and Direct Current

If a battery is connected to a capacitor, it will allows no direct current (DC) to flow through. If a not charged capacitor is connected across the terminals of a battery, a transient current flows as the capacitor plates charge up.

Capacitor and Direct Current. Current starts from its maximum value and decreases to 0 amps. This current is called “transient current”.

The Wheatstone bridge circuit

This circuit  was designed in 1833 by Samuel Hunter Christie (1784-1865). However, It was Mr. Charles Wheatstone who gave many uses to the Wheatstone bridge circuit when he discovered it in 1843.

How to measure very low resistances?

There are special cases of a resistance measurement where the value of the component to be measured is too small and the direct measurement using a multimeter / tester is not practical.

Ohm’s Law explanation

You can establish a relation between the battery voltage, the resistor’s value and the electric current that passes through this resistor. This relation is: I = V/R and it is known as the Ohm’s Law.

Electrostatic Force – Coulomb’s Law

The Electrostatic force is an attraction or a repulsion force. It depends on the charges and distance between them.

Electronics – Electrical Unit Definitions

Definitions of basic measurement units in electricity and electronics. Ampere (A), Coulomb (C), Joule (J), Watt (W), Farad (F), Henry (H), Ohm (Ω), Siemens (S), Volt (V), Hertz (Hz), Radian, Angular frequency (w), Time (t)

RC High Pass Filter (passive High Pass filter)

An RC high pass filter allows only the passage of frequencies above the cut-off frequency (Fc) and eliminates frequencies above this frequency

The Superposition Theorem

The Superposition theorem states that the effect of two or more voltage sources in a resistor is equal to the sum of the individual effects of each source taken separately, replacing all the remaining voltage sources with short circuits.