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Part of Made in India,
Design Innovation
Workshop,2015
A	
  Fresh	
  New	
  Experience	
  in	
  
Project-­‐Making	
  &	
  Learning!
PHYSICSINVESTIGATORY
PROJECTON
WORKINGOFZENERDIODE
Do	
  you	
  know	
  that	
  there	
  are	
  special	
  diodes	
  that	
  conduct	
  
even	
  in	
  reverse	
  bias	
  mode?	
  These	
  diodes	
  are	
  called	
  the	
  
zener	
  diodes	
  which	
  can	
  be	
  used	
  as	
  voltage	
  regulators,	
  
shunt	
  regulators	
  and	
  surge	
  protectors	
  to	
  limit	
  the	
  
transient	
  voltage	
  spikes.	
  You	
  can	
  test	
  out	
  its	
  func?oning	
  
in	
  forward	
  and	
  reverse-­‐bias	
  modes.
This	
  project	
  is	
  divided	
  into	
  two	
  phases.	
  	
  In	
  the	
  first	
  
phase,	
  you	
  will	
  need	
  a	
  breadboard,	
  zener	
  diode,	
  an	
  
LED,	
  a	
  resistor,	
  a	
  mul?meter	
  and	
  a	
  few	
  connec?ng	
  
wires.	
  The	
  orange	
  side	
  of	
  the	
  zener	
  diode	
  is	
  its	
  p-­‐side	
  
and	
  black	
  stripe	
  represents	
  its	
  n-­‐side.	
  	
  The	
  connec?ons	
  
are	
  much	
  such	
  that	
  the	
  posi?ve	
  terminal	
  of	
  the	
  LED	
  is	
  
connected	
  to	
  the	
  n-­‐side	
  of	
  the	
  diode.	
  On	
  the	
  
comple?on	
  of	
  the	
  circuit	
  the	
  LED	
  glows.	
  The	
  voltage	
  
across	
  the	
  zener	
  diode	
  was	
  measured.	
  It	
  was	
  observed	
  
that	
  the	
  diode	
  needs	
  a	
  minimum	
  of	
  0.79V	
  to	
  allow	
  the	
  
current	
  to	
  pass	
  through	
  it.	
  
When	
  the	
  connec?ons	
  of	
  the	
  zener	
  diode	
  were	
  
reversed,	
  the	
  LED	
  s?ll	
  glows.	
  The	
  voltage	
  across	
  the	
  
zener	
  diode	
  was	
  measured.	
  It	
  was	
  observed	
  that	
  the	
  
diode	
  needs	
  a	
  minimum	
  of	
  5.6V	
  to	
  conduct	
  in	
  reverse	
  
biased	
  condi?on.	
  	
  This	
  voltage	
  is	
  known	
  as	
  breakdown	
  
voltage.
In	
  the	
  second	
  phase,	
  you	
  will	
  need	
  a	
  preset,	
  a	
  zener	
  
diode,	
  an	
  LED,	
  a	
  resistor	
  and	
  a	
  few	
  connec?ng	
  wires.	
  A	
  
voltage	
  divider	
  circuit	
  was	
  made	
  using	
  a	
  preset	
  and	
  the	
  
connec?ons	
  of	
  the	
  zener	
  diode	
  were	
  s?ll	
  reversed.	
  The	
  
preset	
  was	
  rotated	
  ?ll	
  the	
  point	
  where	
  the	
  LED	
  stops	
  
glowing	
  and	
  the	
  voltage	
  across	
  the	
  zener	
  diode	
  was	
  
measured.	
  	
  The	
  same	
  process	
  was	
  repeated	
  by	
  rota?ng	
  
the	
  preset	
  to	
  the	
  point	
  where	
  the	
  LED	
  starts	
  glowing.	
  
The	
  breakdown	
  value	
  is	
  printed	
  in	
  the	
  zener	
  diode,	
  the	
  
diode	
  used	
  is	
  of	
  value	
  5V6	
  (i.e.	
  5.6V).	
  
Have	
  a	
  look	
  at	
  what	
  we	
  provide	
  in	
  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,	
  innovaUon	
  and	
  high	
  producUon	
  value.	
  CoolJunk	
  has	
  been	
  
featured	
   in	
   naUonal	
   and	
   internaUonal	
   journals	
   including	
   Wallstreet,	
   Yourstory,	
   Hindu	
   Business	
   Line,	
  
NextBigWhat	
  and	
  was	
  tagged	
  as	
  the	
  coolest	
  Indian	
  start-­‐up	
  in	
  IAN	
  Bootcamp-­‐2011.	
  
You	
  may	
  also	
  refer	
  to	
  the	
  video:	
  Introduc>on	
  to	
  Zener	
  Diode
V-­‐I	
  Characteris>cs	
  of	
  Zener	
  Diode
For	
  more	
  projects	
  visit	
  our	
  website:	
  CoolJunk	
  
All	
  tools	
  and	
  components	
  
in	
  one	
  box.
Step	
  by	
  step	
  visual	
  
instrucUons
Detailed	
  experiment	
  
theory
CoolJunkCoolJunkCoolJunk
Follow	
  us	
  on:
CoolJunk

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Physics Investigatory Project on Working of Zener Diode.

  • 1. Part of Made in India, Design Innovation Workshop,2015 A  Fresh  New  Experience  in   Project-­‐Making  &  Learning!
  • 3. Do  you  know  that  there  are  special  diodes  that  conduct   even  in  reverse  bias  mode?  These  diodes  are  called  the   zener  diodes  which  can  be  used  as  voltage  regulators,   shunt  regulators  and  surge  protectors  to  limit  the   transient  voltage  spikes.  You  can  test  out  its  func?oning   in  forward  and  reverse-­‐bias  modes. This  project  is  divided  into  two  phases.    In  the  first   phase,  you  will  need  a  breadboard,  zener  diode,  an   LED,  a  resistor,  a  mul?meter  and  a  few  connec?ng   wires.  The  orange  side  of  the  zener  diode  is  its  p-­‐side   and  black  stripe  represents  its  n-­‐side.    The  connec?ons   are  much  such  that  the  posi?ve  terminal  of  the  LED  is   connected  to  the  n-­‐side  of  the  diode.  On  the   comple?on  of  the  circuit  the  LED  glows.  The  voltage   across  the  zener  diode  was  measured.  It  was  observed   that  the  diode  needs  a  minimum  of  0.79V  to  allow  the   current  to  pass  through  it.   When  the  connec?ons  of  the  zener  diode  were   reversed,  the  LED  s?ll  glows.  The  voltage  across  the   zener  diode  was  measured.  It  was  observed  that  the   diode  needs  a  minimum  of  5.6V  to  conduct  in  reverse   biased  condi?on.    This  voltage  is  known  as  breakdown   voltage. In  the  second  phase,  you  will  need  a  preset,  a  zener   diode,  an  LED,  a  resistor  and  a  few  connec?ng  wires.  A   voltage  divider  circuit  was  made  using  a  preset  and  the   connec?ons  of  the  zener  diode  were  s?ll  reversed.  The   preset  was  rotated  ?ll  the  point  where  the  LED  stops   glowing  and  the  voltage  across  the  zener  diode  was   measured.    The  same  process  was  repeated  by  rota?ng   the  preset  to  the  point  where  the  LED  starts  glowing.   The  breakdown  value  is  printed  in  the  zener  diode,  the   diode  used  is  of  value  5V6  (i.e.  5.6V).  
  • 4. Have  a  look  at  what  we  provide  in  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,  innovaUon  and  high  producUon  value.  CoolJunk  has  been   featured   in   naUonal   and   internaUonal   journals   including   Wallstreet,   Yourstory,   Hindu   Business   Line,   NextBigWhat  and  was  tagged  as  the  coolest  Indian  start-­‐up  in  IAN  Bootcamp-­‐2011.   You  may  also  refer  to  the  video:  Introduc>on  to  Zener  Diode V-­‐I  Characteris>cs  of  Zener  Diode For  more  projects  visit  our  website:  CoolJunk   All  tools  and  components   in  one  box. Step  by  step  visual   instrucUons Detailed  experiment   theory CoolJunkCoolJunkCoolJunk Follow  us  on: CoolJunk