PWM (Pulse Width Modulation) Pulse width modulation (PWM) controls the width of a digital signal to adjust the power delivered to certain devices. The width of the active pulse (“ON”) is modified to regulate the amount of current flowing to the device. How does pulse width modulation (PWM) work? It functions like a switch that […]
The difference between electricity and electronics or the difference of an electric circuit and an electronic circuit, is that in the electronics circuit, a control is exercised over the flow of the electric current.
The universal electric motor is so named because it is the only motor that can be connected to both alternating current and direct current.
Amplifiers and Amplification
Amplifiers are circuits that are used to increase an input signal, thus you can obtain an output signal with much greater amplitude than the original one. Amplification is the process to increase the magnitude of a signal, generally using an amplifier.
Ebers Moll Model of a Bipolar Transistor
The bipolar transistor is an electronic device that originates a big evolution in the electronics field. The basic features of the bipolar transistor are introduced on this topic. We’ll study the basic model (Ebers Moll Model) of these devices and their use in the analysis of circuits biasing.
What are MOSFET Transistors?
MOSFET Transistors or Metal Oxide-Semiconductor (MOS) are field effect devices that use the electric field to create a conduction channel. MOSFET transistors are more important than JFETs because almost all Integrated Circuits are built with the MOS technology.
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.
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.
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.
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)
Counter-electromotive force or Back-electromotive force
The voltage of a DC motor is divided into a voltage in the windings resistance and a voltage called Counter-electromotive force
One of the characteristics of an AC motor is the number of rotor poles. This data will automatically give the number of windings that the motor has: # windings = # poles x 2.