Aug 17, 2010 #1 M manuj216 Newbie level 3 Joined Aug 17, 2010 Messages 3 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location india Activity points 1,305 how can i change the frequency of 555 ic timer????
Aug 17, 2010 #2 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 Re: 555 ic timer you have the equation for 555 timer frequency in terms of R1 ,R2 and C used . substitute the values you require.
Re: 555 ic timer you have the equation for 555 timer frequency in terms of R1 ,R2 and C used . substitute the values you require.
Aug 18, 2010 #3 V vidakk Newbie level 2 Joined May 3, 2009 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,292 Re: 555 ic timer You can find the datasheet here: http://www.datasheetcatalog.org/datasheet/stmicroelectronics/2182.pdf The fomulas you want: Charge period (output high): t1=ln(2)*(R1+R2)*C1 Discharge period (output low): t2=ln(2)*R2*C1 Total period T is t1+t2, from there you can calculate frequency (f=1/T).
Re: 555 ic timer You can find the datasheet here: http://www.datasheetcatalog.org/datasheet/stmicroelectronics/2182.pdf The fomulas you want: Charge period (output high): t1=ln(2)*(R1+R2)*C1 Discharge period (output low): t2=ln(2)*R2*C1 Total period T is t1+t2, from there you can calculate frequency (f=1/T).
Aug 18, 2010 #4 A ants Full Member level 4 Joined Feb 20, 2010 Messages 199 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,296 Location UK Activity points 3,006 555 ic timer Use this calculator: **broken link removed**