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???
06/09/06 14:53
Modified:
  06/09/06 14:54

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#118099 - not very good odds
Responding to: ???'s previous message
If you are careful, they might work.
not very good odds

using a schmidt-triggered nand gate, with the same input to both inputs, albeit one delayed via series resistor followed by a cap to GND
as Richard states above, basically the same with the same problems

One-shots are a short-cut, and were popular during the '70's, before people learned how to design digital circuits.
That may be part of the reason, but I used them in those days mainly because no reasonable alternative was available. The "design digital circuits" I use for pulse generation today, I could have designed then (it was not "before I learned how ") just as well - but when a flip=flop was some transistors, diodes and resistors (1/2 a "logic PCB".), "building" a shift register took a handful of FF PCBs, where the one shot in the foot typically took just 1/2 a "logic PCB". Today you get the entire shift register/counter in the same size (chip package) as the one shot in the foot. THAT, I think is the real reason for not using them any more.

Erik

List of 36 messages in thread
TopicAuthorDate
Cable Capacitance Problem ?            01/01/70 00:00      
   Theorizing? this should be fairly easy t            01/01/70 00:00      
      Yes. Lamp is turned OFF and ON            01/01/70 00:00      
         I take that this is simultaneous to my a            01/01/70 00:00      
      The one-shot is probably a factor            01/01/70 00:00      
         Schematic upload - how to do it?            01/01/70 00:00      
            Here is the link            01/01/70 00:00      
   Lamp is working like PTC            01/01/70 00:00      
      in the olden days, they were called URDO            01/01/70 00:00      
         Thanks for the explanation.            01/01/70 00:00      
            because            01/01/70 00:00      
   I miss the urgently needed bandwidth lim            01/01/70 00:00      
       I agree, the idea was too simplistic            01/01/70 00:00      
         peanuts...            01/01/70 00:00      
            I'd say            01/01/70 00:00      
      Working Solution            01/01/70 00:00      
         I don't think it's solved...            01/01/70 00:00      
            Details            01/01/70 00:00      
               Hello?            01/01/70 00:00      
                  try this, try that, go broke            01/01/70 00:00      
               In many companies, it will get you fired            01/01/70 00:00      
                  expanding            01/01/70 00:00      
                  Just debating            01/01/70 00:00      
                     They're a crutch ...            01/01/70 00:00      
                     so called professionals that believe tha            01/01/70 00:00      
                     Monoflops            01/01/70 00:00      
                        burnt child shy fire            01/01/70 00:00      
                        If you are careful, they might work.            01/01/70 00:00      
                           not very good odds            01/01/70 00:00      
                           Being careful...            01/01/70 00:00      
         not noise supression            01/01/70 00:00      
   does the ULN(can't read the numbers) dri            01/01/70 00:00      
      ULN2003            01/01/70 00:00      
         I did NOT ask for the part number, I ask            01/01/70 00:00      
            By other words...            01/01/70 00:00      
               Books don't say all this.            01/01/70 00:00      

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