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Part of Made in India,
Design Innovation
Workshop,2015
A	
  Fresh	
  New	
  Experience	
  in	
  
Project-­‐Making	
  and	
...
PHYSICSINVESTIGATORY
PROJECTON
NANDGATEUSINGTRANSISTORS
Do	
  you	
  know	
  the	
  working	
  behind	
  the	
  door	
  closure	
  system	
  
of	
  a	
  car?	
  The	
  concept	
 ...
Have	
  a	
  look	
  at	
  our	
  Project	
  Kit!
CoolJunk	
   is	
   India's	
   fastest	
  growing	
  DIY	
  (do-­‐it-­‐...
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Physics Investigatory Project on NAND Gate using Transistors.

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Physics Investigatory Project on NAND Gate using Transistors.

  1. 1. Part of Made in India, Design Innovation Workshop,2015 A  Fresh  New  Experience  in   Project-­‐Making  and   Learning
  2. 2. PHYSICSINVESTIGATORY PROJECTON NANDGATEUSINGTRANSISTORS
  3. 3. Do  you  know  the  working  behind  the  door  closure  system   of  a  car?  The  concept  of  a  NAND  gate  will  help  you  infer  it’s   working;  it  has  two  inputs  (A  and  B)  and  only  one  output   (Q).  The  ECU  (electronic  control  unit)  of  the  car  is  designed   such  that  the  driver  gets  a  visual  indicaNon  if  any  car  door   is  open;  it  helps  avoid  accident  and  injury  to  the   passengers.   Let  us  assume  that  there  are  two  doors  in  a  car  and  the   above  system  is  installed.  When  any  of  the  switches  is   open  due  to  the  door  posiNon,  the  NAND  gate  energies  the   lamp  inside  the  car,  hence  warning  the  driver. In  this  project,  you  will  make  a  NAND  gate  logic  circuit   using  two  transistors  (Q1  and  Q2),  four  resistors,  an  LED   and  a  few  connecNng  wires.  The  emiTer  of  Q1  is  connected   to  the  collector  of  Q2.  The  collector  of  Q1  is  connected  to   Vcc  (posiNve/high  voltage)  while  the  emiTer  of  Q2  is   connected  to  ground  (negaNve/low  voltage).  Two   connecNng  wires  are  connected  to  the  leW  leg  of  the  base   resistors.  Each  connecNng  wire  represents  the  input.  This   input  could  be  either  1  or  0,  where  1  stands  for  Vcc  and  0   stands  for  ground. To  provide  the  inputs;  the  truth  table  of  the  NAND-­‐gate   was  followed. Input  A Input  B Output  Q 0 0 1 0 1 1 1 0 1 1 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.  AWer  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.
  4. 4. 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,  innovaNon  and  high  producNon  value.  CoolJunk  has  been   featured   in   naNonal   and   internaNonal   journals   including   Wallstreet,   Yourstory,   Hindu   Business   Line,   NextBigWhat  and  was  tagged  as  the  coolest  Indian  start-­‐up  in  IAN  Bootcamp-­‐2011.   For  more  projects  visit  our  website:  CoolJunk   Tools  and  Components  in   one  box. Step  by  step  visual   instrucNons Detailed  experiment   theory CoolJunkCoolJunkCoolJunk Follow  us  on:

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