Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
03/21/08 21:55
Read: times


 		 #152428 - Thanks Steve but please note change
Responding to: ???'s previous message
Dear All,
Steve,Please note i have tried to improve the circuit.Can you please suggest a cheap hex schmitt inverter. And if you will pardon me ,can I ask why? Because you will appreciate that people who invest think they are expert in redunduncy analysis.I have to prove each and every step,Oh dear me!
Thanks Steve anyway.I look forward to your further advice with keen interest.
My main reason of asking this question is possible noise.I think you had advised for a metal tube cable conduit; I am prepared.
As far as I understand "schmitt"s are used to convert irregular waveforms to clean TTLs.But I do not want them;I want only the remote relay closures...I will debounce at length...nobody will detect even a solid 100ms delay for detecting each input.
Please let me know where I am wrong.
With best regards
A.S.Rudra

List of 44 messages in thread
TopicAuthorDate
Possibly noisy Relay/Switch Inputs            01/01/70 00:00      
   Schmitt inverter            01/01/70 00:00      
      Thanks Steve but please note change            01/01/70 00:00      
         Steve's suggestion is certainly valid!            01/01/70 00:00      
            Thanks Richard            01/01/70 00:00      
               Do you really need the optoisolators?            01/01/70 00:00      
         Why Schmitt Gates            01/01/70 00:00      
            That is the purpose of Schmidt-triggers ...            01/01/70 00:00      
   This is how I would do it            01/01/70 00:00      
      I'd probably do that too, except ...            01/01/70 00:00      
      Thanks            01/01/70 00:00      
         The waters have been muddied ...            01/01/70 00:00      
            Thanks            01/01/70 00:00      
               Yes, it's clearer, but ...            01/01/70 00:00      
                  Priority Encoder Not a Good Idea            01/01/70 00:00      
                     Yes, highest priority input would mask others            01/01/70 00:00      
                     Welcome Sir Michael Karas            01/01/70 00:00      
                        Note Length & Cadence on One Timer            01/01/70 00:00      
         Noise            01/01/70 00:00      
            It's all analog            01/01/70 00:00      
   Another way to do this            01/01/70 00:00      
   how fast do you need to detect the contacts            01/01/70 00:00      
      Hello Erik,Hello Kai,            01/01/70 00:00      
         what are you describing?            01/01/70 00:00      
            actual distance test(ohmically)            01/01/70 00:00      
               please answer questions            01/01/70 00:00      
                  Part success            01/01/70 00:00      
                     In the last analysis, it is up to you            01/01/70 00:00      
                        Provocative            01/01/70 00:00      
                           totally irrelevant            01/01/70 00:00      
                     what 'common'            01/01/70 00:00      
                     Transformerless supply...            01/01/70 00:00      
                        Thanks            01/01/70 00:00      
                           I do not understand, parallelling switches            01/01/70 00:00      
                              Absolutely deadly dangerous!!!!            01/01/70 00:00      
                              parallelling switches            01/01/70 00:00      
                                 Sorry, but I see a contradiction...            01/01/70 00:00      
                                    shock? touching what?            01/01/70 00:00      
                                       Come on!            01/01/70 00:00      
                                          The standard to which we designed ...            01/01/70 00:00      
         I believe you may have missed the point            01/01/70 00:00      
   Current rating of relay?            01/01/70 00:00      
      not to nitpick, but            01/01/70 00:00      
         Thank you very much Erik            01/01/70 00:00      

Back to Subject List