OR Gate Using Diodes
Автор: Electro Spark
Загружено: 2026-01-26
Просмотров: 12
Описание:
OR Gate Using Diodes | Digital Logic Circuit with Truth Table
In this video, I explain the working principle of an OR gate implemented using diodes, resistors, and an LED, without using any logic IC. This hardware-based approach helps in understanding digital logic gates at the basic circuit level.
An OR gate produces a HIGH output when at least one of the inputs is HIGH. The output is indicated using an LED, making the operation simple and visually clear.
Circuit Overview:
Logic inputs: A and B
Components used: Diodes, resistor (1 kΩ), LED
Output indication: LED ON / OFF
Implementation: Discrete components (no IC)
Working Principle:
If A = 0 and B = 0, the LED remains OFF
If A = 1 or B = 1 (or both), the LED turns ON
The observed behavior exactly follows the OR gate truth table
Truth Table:
A
B
Output (LED)
0
0
OFF
0
1
ON
1
0
ON
1
1
ON
This project is useful for:
Beginners in Digital Electronics
Engineering and diploma students
Understanding logic gates using diodes
Academic mini-projects and lab experiments
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