Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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BCD Code – Binary Coded Decimal
In order to share information in digital format, it is common to use a binary or hexadecimal representations (BCD Code). There are other methods to represent this information and one of them is the BCD code.
Burglar alarm using thyristor and relay
Burglar alarm using thyristor and relay
This is a simple Burglar alarm uses a thyristor as the main element and a relay as the output device. The relay can activate a buzzer or a siren.
Light Push button Circuit with time delay
This Time Delay Light switch circuit is useful to illuminate locations where a low power light source is needed. A closet, a car trunk, are good examples.
Binary Number System
The Binary Number System, unlike the Decimal Number System, where 10 figures are allowed (from 0 to 9), only needs 2 figures: “0” and “1”.
What is the Internal Resistance of a Voltage Source?
Voltage sources, whether batteries, generators, etc., are not ideal (perfect). A real voltage source is composed of an ideal voltage source in series with a resistance called internal resistance.
Variable voltage regulator using 7805 and 741
Very simple variable voltage regulator with very few components. Output Voltage from 5 to 30 volts
Mini variable Power supply circuit (0-30V, 1A)
Totally transistorized with 0 to 30V output voltage range. It can be used for projects where the current consumption is 1A max.
Automatic night light circuit with one LED (PCB)
This automatic night light circuit with a LED is simple, interesting and very easy to do. The circuit allows a better understanding of the operation of a phototransistor and thus be able to use it in other applications. (PCB)
SCR (Silicon Controlled Rectifier) – Thyristor
What is an SCR?
The SCR (Silicon Controlled Rectifier) is a 4-layer semiconductor device that works as an almost ideal switch.
NOR Gate – The Universal Gate
The NOR Logic gate – Truth Table, equivalent circuit. It can be implemented with the concatenation of an OR gate and a NOT gate.
Main Power Failure Alarm and battery backup circuit
Main Power failure alarm and battery backup Circuit
This Main Power failure alarm circuit tells us when the electricity that powers a system or circuit, is gone.
Ohm’s Law and Electrical Power – Formulas
Ohm’s law and electrical power. Ohm’s law relates V, I, and R. A more complete expression of Ohm’s law is achieved using the electrical power formula