May 5, 2011 #1 E electroboy Member level 5 Joined Dec 30, 2010 Messages 86 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,879 In the following astable multivibrator circuit, in some books, it is mentioned that the duty cycle id d=( R1+R2)/(R1+2*R2) in some other books, it is mentioned d= R2/(R1+2*R2) which is correct? which one should i use if i want to design a circuit of particular duty cycle ? please tell me whether duty cycle is Ton/(Ton+Toff) or Toff/(Ton+Toff)
In the following astable multivibrator circuit, in some books, it is mentioned that the duty cycle id d=( R1+R2)/(R1+2*R2) in some other books, it is mentioned d= R2/(R1+2*R2) which is correct? which one should i use if i want to design a circuit of particular duty cycle ? please tell me whether duty cycle is Ton/(Ton+Toff) or Toff/(Ton+Toff)
May 5, 2011 #2 ckshivaram Advanced Member level 6 Joined Apr 21, 2008 Messages 5,060 Helped 2,150 Reputation 4,306 Reaction score 2,088 Trophy points 1,393 Location villingen (Germany) / Bangalore Activity points 30,086 see this https://www.edaboard.com/threads/81131/
May 5, 2011 #3 S srizbf Advanced Member level 5 Joined Apr 3, 2010 Messages 1,992 Helped 417 Reputation 840 Reaction score 329 Trophy points 1,363 Activity points 10,985 duty cycle is Ton/(Ton+Toff)
May 5, 2011 #4 E electroboy Member level 5 Joined Dec 30, 2010 Messages 86 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,879 ckshivaram said: see this https://www.edaboard.com/threads/81131/ Click to expand... i can't understand still sir.. please explain me ..
ckshivaram said: see this https://www.edaboard.com/threads/81131/ Click to expand... i can't understand still sir.. please explain me ..
May 5, 2011 #5 alexan_e Administrator Joined Mar 16, 2008 Messages 11,888 Helped 2,021 Reputation 4,158 Reaction score 2,031 Trophy points 1,393 Location Greece Activity points 64,371 This page has the equations and a calculator **broken link removed** Also check 555 and 556 Timer Circuits Alex
This page has the equations and a calculator **broken link removed** Also check 555 and 556 Timer Circuits Alex
May 5, 2011 #6 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,413 Helped 14,749 Reputation 29,780 Reaction score 14,097 Trophy points 1,393 Location Bochum, Germany Activity points 298,068 which is correct? which one should i use if i want to design a circuit of particular duty cycle ? please tell me whether duty cycle is Ton/(Ton+Toff) or Toff/(Ton+Toff) Click to expand... I think, it's your choice. That's also the reason, why both expressions for d exist. In my opinion, you would define high output as "on" and duty cycle as Ton/(Ton+Toff). In this case, the first expression applies: d=( R1+R2)/(R1+2*R2)
which is correct? which one should i use if i want to design a circuit of particular duty cycle ? please tell me whether duty cycle is Ton/(Ton+Toff) or Toff/(Ton+Toff) Click to expand... I think, it's your choice. That's also the reason, why both expressions for d exist. In my opinion, you would define high output as "on" and duty cycle as Ton/(Ton+Toff). In this case, the first expression applies: d=( R1+R2)/(R1+2*R2)
May 5, 2011 #7 alexan_e Administrator Joined Mar 16, 2008 Messages 11,888 Helped 2,021 Reputation 4,158 Reaction score 2,031 Trophy points 1,393 Location Greece Activity points 64,371 electroboy said: please tell me whether duty cycle is Ton/(Ton+Toff) or Toff/(Ton+Toff) Click to expand... Normally when we say that the duty cycle is 10% we mean then the output is on for 10% of the period time so I think you should use Ton/(Ton+Toff) Alex
electroboy said: please tell me whether duty cycle is Ton/(Ton+Toff) or Toff/(Ton+Toff) Click to expand... Normally when we say that the duty cycle is 10% we mean then the output is on for 10% of the period time so I think you should use Ton/(Ton+Toff) Alex
May 6, 2011 #8 H hareesh_mohan Newbie level 6 Joined Feb 14, 2010 Messages 13 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Location india Activity points 1,367 Ton/Ton+Toff
May 21, 2011 #9 sherazi Banned Joined Feb 15, 2010 Messages 388 Helped 61 Reputation 126 Reaction score 61 Trophy points 1,318 Location Muscat, Oman, Oman Activity points 0 duty cycle is ton/(ton+toff) http://teeblog.blog.com/archives/66/#as Read this for calculations and basic theory
duty cycle is ton/(ton+toff) http://teeblog.blog.com/archives/66/#as Read this for calculations and basic theory
Jul 4, 2011 #10 E engr.fawad Newbie level 4 Joined Jun 22, 2011 Messages 7 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,310 you can also try this link for understanding 555 ic as a-stable multivibrator