# Electronics Area – Electrical and Electronics Tutorials and Circuits

# Welcome to Electronics Area

## Electrical and Electronics Tutorials and Circuits

### Recent posts

## Mesh Current Method – Steps to follow – Example

The mesh current method is very useful for finding all the currents in a network. This method, a little more advanced, is also applied to circuits where there are resistances and reactances.

## Emergency Lighting Circuit with LEDs and Rechargeable Battery

This circuit is very interesting because, unlike emergency lighting circuits that use incandescent bulbs, it uses high-efficiency LEDs.

## Node Analysis Method – Steps – Example

The node analysis method also known as the nodal analysis is widely used to solve linear resistive circuits (this method, in a slightly extended form, also applies to resistive-reactive circuits)

## Voltage Divider – Voltage Division – Series Resistors

The voltage divider is a circuit that allows us to obtain an output voltage less than the input voltage. The output voltage is normally obtained across ground and the resistor connected to it, but it could be across any of the other resistors.

## Maximum Power Transfer Theorem Explanation

What does the Maximum Power Transfer Theorem say? “The maximum power transfer to the load is obtained when the load resistance RL is equal to the internal resistance of the…

## Karnaugh Map (K-map) – How to simplify Boolean functions

The Karnaugh map (K-map) is a widely used tool for simplifying logic circuits. When you have a logical function with its truth table, and you want to implement this function in the simplest and most economical way, this method is used.

## Energy-saving Flashing Pilot Light

This Energy-saving Flashing Pilot Light Circuit is intended to give us a visual warning that we have electronic equipment turned on. This is especially important on equipment that uses batteries.

## Voltage Drop Alarm Circuit – Useful for PS Testing

This voltage drop alarm is very useful for power supply monitoring or testing. It activates a buzzer when the test voltage drops below a reference voltage.

## How to add a tweeter to a baffle or speaker

How to add a tweeter to a baffle or speaker. Very simple circuit, using only one potentiometer and two capacitors, very easy to install.

## Electronic Filters – Low-Pass, High Pass, Band Pass

Electronic Filters – Filters are networks that allow or block the passage of a specific group of frequencies (frequency band)

## Scientific Notation – Engineering Notation

Scientific notation and engineering notation allow the representation of very large or very small quantities, very common in engineering and technical fields

## Perfect Square Wave with 555 – Formula – Examples

Perfect Square Wave with 555 – A simple circuit that uses the 555 timer to produce a stable perfect square wave. Formula, examples.