What is a Zener diode?
The Zener diode is a special type of diode that allows the flow of current on the opposite direction of the arrow of the diode. This diode does not conduct until the applied voltage reaches or is greater of the breakdown voltage. Zener diode is very popular as Voltage reference element.
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)
What is an Inductor? – Inductance – Units
Inductor stores energy in form of magnetic field due to the self-induction phenomenon. A cable where a current circulates, has on its surroundings a magnetic field.
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
How to make 12V 1A power supply using zener diode and transistors?
This 12V 1A power supply using zener diode and transistors allows us to obtain an output of approximately 11.4 volts with a very small percentage variation for a wide variety of loads.
Lie detector circuit using two transistors
This simple lie detector consists of two transistors and other additional components and can detect if a person does not tell truth (the person is lying), using two sensors placed directly on the skin.