Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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7-segment Display
What is a 7-segment Display?
The 7-segment display, is a component used to represent numbers in many electronic devices.
Today, it is very common to find LCDs in much electronic equipment, but there are many that still use the 7-segment display for its simplicity.
Darlington transistor
What is a Darlington transistor?
The Darlington transistor is a special type of transistor with a high current gain. It consists of two internally bipolar transistors being connected in cascade
Voltage – Electrical Potential Difference
Potential difference or Voltage is a kind of force that push charges through a conductor. The larger the voltage, the larger the force
What is an Alternating Current?
The difference between an alternating current and a direct current is that a direct current only flows in one direction. Alternating current circulates in one direction, then the opposite direction, and repeats this process continuously.
Light-Emitting diode connected to 120/240 VAC
This circuit shows one or two LEDs directly connected to the outlet (120 VAC or 240 VAC). The reduction of the AC input voltage to one that is suitable to use in a LED diode is achieved using a capacitor and a resistor.
Time Delay circuit using Triac and 555 timer
This Time delay circuit using Triac and 555 Timer is very useful when we want to activate or switch on, appliances or devices that work on alternating current (AC), after a preset time.
Differential Temperature Controller (PCB)
This circuit measures the temperature difference between 2 sensors and activates a relay when they are different. It is also possible to detect a temperature change, even when the two measured temperatures are normally different.
Iron Core Inductor
The iron core inductor has very special magnetic characteristics. What they do is to reinforce the magnetic field. The magnetism of the core material depends on the bias of “the molecular magnetic domains”
Benjamin Franklin’s Fluid Theory
Benjamin Franklin imagined the electricity as a invisible fluid. Franklin assured that if any body had more fluid than usual, it could have a positive charge, but if it had less fluid than normal it had negative charge.
Digital Logic Levels (hight, low, 1, 0)
In digital circuits, it is common to say that we have a “high or a “low” logic level at the input or output of a circuit. If we have a “high” level we say it is a “1” and if we have a “low” level we say that it is a “0”.
LDR – Photoresistor
What is an LDR – Photoresistor? LDR (Light Dependent Resistor) is light sensitive resistor whose resistance changes with the light intensity that falls upon it.
Resonance in an RLC Circuit
Resonance in RLC Circuits is a special condition for parallel and series RLC circuits, when capacitive reactance and inductive reactance have the same magnitude and cancel each other. This only happens at frequency fo.