Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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UJT Relaxation oscillator circuit
The UJT relaxation oscillator circuit is a non-linear oscillator used to generate a non-sinusoidal repetitive output signals that can trigger power control devices such as SCRs and TRIACs.
Joule’s Law. Joule’s Law formula
What is Joule’s Law?
It is known as Joule effect to the phenomenon by which if in a wire circulates an electrical current, part of the energy is transformed into heat. This law (Joule’s Law) is named after the British physicist James Prescott Joule.
Inductor – Inductance
Inductor – Coil. Inductance units. The inductor is made of a conductive wire wrapped into a spring like form. Magnetic field lines – Counter electromotive force (CEMF)
TRIAC
TRIAC. Power control on alternating current (AC)
Triac is a semiconductor device that belongs to the family of thyristor control devices. It is essentially two SCR connected in parallel and backwards, sharing the same gate.
Relay – Electromagnetic Switch
What is a relay?
Relay was invented in 1835 by the US scientist Joseph Henry (1797–1878). Relay or elecromagnetic relay is a magnetically operated switch that is activated or deactivated when the electromagnet is energized.
What is Direct Current? – What is DC?
Direct Current (DC), is the result of the flow of electrons (negative charge) in a conductor (most of the time, wires of copper) that goes only in one direction.
Transformer Turn Ratio (K)
The transformer turn ratio (K) is the quotient value obtained by dividing the number of turns of the primary winding (N1) and the number of turns of the secondary winding (N2). Then K = N1/N2.
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.
What are Microwaves? Applications, Frequency & Wavelength
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 (DC) – Dielectric
Capacitor and Direct Current. If a not charged capacitor is connected across the terminals of a battery, a transient current flows as the capacitor plates charge up.
What is the Wheatstone Bridge Circuit?
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.
Coulomb’s Law – Electrostatic Force – Formula – Example
Coulomb’s Law – Electrostatic Force – Formula – Example. Learn how to calculate the electrostatic force between 2 electric charges using Coulomb’s Law.