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.

Why is there a diode connected in parallel to a relay coil?

The purpose of a diode connected in parallel to a relay coil (flywheel diode or freewheeling diode) is to avoid damaging some nearby components sensitive to high voltage.

Power Supply block Diagram

Many electronic circuits need a direct current (DC) voltage source, but what we commonly find are voltage sources of alternating current (AC). In order to achieve a direct current voltage source, the alternating current input must follow a conversion process.

Universal Electric Motor – Constitution, Operation, Speed

The universal electric motor is so named because it is the only motor that can be connected to both alternating current and direct current.

Transformerless Power Supply circuit

This circuit is designed to be connected to a specific circuit because it can give a maximum and minimum possible electric current

Transistorized Voltage Regulator Why use a transistorized voltage regulator? If we use a half or a full-wave rectifier we can convert an AC voltage in a DC one. This converted voltage is unregulated, because the output voltage is not constant and can change due to variations of the load value. To reduce these variations we connect […]

How does a Zener diode voltage regulator work?

Design method. Determination of the voltage, power of the zener diode and of the limiting resistor Rs

Voltage regulators

Voltage regulators (linear, switching) provide a stable and fixed voltage output to give energy to electronics circuits from an unregulated power source

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.