Part of Made in India,Design Innovation
Workshop,2015
A Fresh New Experience in
Project-‐Making and Learning
Do you know what controls the working of a washing machine? The concept of a 3-‐input NOR gate will help you understand this; it has three inputs (A, B and C) and only one output (Q). There are three sensors in the washing machine, which provide inputs to the 3-‐input logic gate. When all the three inputs A, B and C are low (0), the output of the gate produces a high output (1) due to which the machine gets ON.
In case of an erroneous condiSon, like the lid is open or water is below the minimum level, the sensors provide high input to the 3-‐input logic gate due to which the gate produces a low output (0) and subsequently, the machine turns OFF.
In this project, you will make an NOR gate logic circuit using two diodes, two resistors, an LED and a few connecSng wires. Two connecSng wires are connected to the p-‐sides of the diodes; the n-‐sides of both the diodes are given the same potenSal. Each connecSng wire
represents the input. This input could be either 1 or 0, where 1 stands for Vcc (posiSve/high voltage) and 0 stands for ground (negaSve/low voltage).
To provide the respecSve inputs, the truth table of OR gate is followed.
Input A Input B Output Q0 0 10 1 01 0 01 1 0
On providing the inputs, if the LED glows this means output Q = 1 or high. If the LED does not glow, the output Q = 0 or low. AYer verifying the experimental outputs in four different cases of the inputs, we do the ‘path of current’ analysis and reason out why the LED glows in each case.
Have a look at our Project Kit!
CoolJunk is India's fastest growing DIY (do-‐it-‐yourself) kits company focused on project-‐based learning in science, engineering and technology. Having 20,000 users in India, US, Singapore, Middle East and New Zealand, the CoolJunk kits are known for quality, innovaSon and high producSon value. CoolJunk has been featured in naSonal and internaSonal journals including Wallstreet, Yourstory, Hindu Business Line, NextBigWhat and was tagged as the coolest Indian start-‐up in IAN Bootcamp-‐2011.
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Tools and Components in one box.
Step by step visual instrucSons
Detailed experiment theory
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