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???
02/27/06 05:01
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 		 #110834 - alternatives ?
Responding to: ???'s previous message
Kai Klaas said:
Capacitor coupling is not enough, if you need precise periods. Have a look at figure 4 of this datasheet


When working with the circuit i couldnt see any difference in Time delay as per the abnormalities given in fig4 of the datasheet. But ofcourse i could not check for precision less than 1 sec!
I would also like to know if there are any alternatives for this cap coupling, that could prevent this abnormality and could achieve precise timing.

suresh.






List of 39 messages in thread
TopicAuthorDate
Pressing 555 trigger SW continuously.            01/01/70 00:00      
   Again            01/01/70 00:00      
   capacitor couple it.            01/01/70 00:00      
      Re: cap coupling            01/01/70 00:00      
         Look up the internal block diagram            01/01/70 00:00      
            Read the Data Sheet!!            01/01/70 00:00      
      got the o/p            01/01/70 00:00      
         Satisfaction            01/01/70 00:00      
            Thanku steve            01/01/70 00:00      
         Not enough            01/01/70 00:00      
            alternatives ?            01/01/70 00:00      
               Remedy            01/01/70 00:00      
                  remedy?            01/01/70 00:00      
                     Alternatives            01/01/70 00:00      
                  BC550 & diodes            01/01/70 00:00      
                     Try it by yourself, it's simple!            01/01/70 00:00      
                        analysis results            01/01/70 00:00      
                           Analysis            01/01/70 00:00      
                              Thank you            01/01/70 00:00      
                              after the set delay Time            01/01/70 00:00      
                                 Enhanced debouncing            01/01/70 00:00      
                                    What do you think about it, Suresh?            01/01/70 00:00      
   why the neqw thread            01/01/70 00:00      
      reply            01/01/70 00:00      
         Read the Data Sheet!!            01/01/70 00:00      
   kalpak dabir            01/01/70 00:00      
   Have you considered using a 74121?            01/01/70 00:00      
      74121 versus CMOS555            01/01/70 00:00      
      74121 fine for short period delays?            01/01/70 00:00      
         No debounce needed???            01/01/70 00:00      
            Schmitt trigger operation?            01/01/70 00:00      
               Transition times of input signal            01/01/70 00:00      
                  controlling noise related issues            01/01/70 00:00      
                     Schmitt-trigger operation            01/01/70 00:00      
                      CD 4541BC = Alternative for ICM 7555?            01/01/70 00:00      
                        Do you really need to build it?            01/01/70 00:00      
                           Yes.            01/01/70 00:00      
                              try try try again            01/01/70 00:00      
                                 a sign of confidence            01/01/70 00:00      

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