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???
08/29/05 16:57
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#100234 - Why not use a microcontroller instead?
Responding to: ???'s previous message
Hi Damien,

What you're trying to do is a perfect example of a project that is ideal for a microcontroller.

Instead of a timer chip with all its required discrete parts (which must be changed if timing is adjusted) try using a uC with a built-in clock oscillator. You can implement in code a simple state machine that looks at a switch connected to it, and if held for your 3-5 seconds then activate an output. There is a lot of flexibility, and you can make changes without having to change the board.

Furthermore, a small uC can be cheaper than the timer, especially when you don't need to buy the resistors and capacitors all around it. Board space costs too.

Dennis



List of 19 messages in thread
TopicAuthorDate
556 timer            01/01/70 00:00      
   Why not use a microcontroller instead?            01/01/70 00:00      
   556 timer            01/01/70 00:00      
      Why, you do not need one, haven't you he            01/01/70 00:00      
      cheap micro eval board            01/01/70 00:00      
         even better            01/01/70 00:00      
         556 timer            01/01/70 00:00      
            have a look at            01/01/70 00:00      
                have a look at            01/01/70 00:00      
   $0.39 4013 flip flop solution.            01/01/70 00:00      
      $0.39 4013 flip flop solution.            01/01/70 00:00      
      $0.59 solution            01/01/70 00:00      
         Not an 8051...            01/01/70 00:00      
            didn't know            01/01/70 00:00      
            Tiny11 has 32 Byte RAM            01/01/70 00:00      
               Application            01/01/70 00:00      
                  if a VERY small uC is the right tool, wh            01/01/70 00:00      
                     Because Philips ignorance            01/01/70 00:00      
                        stuck in a rut            01/01/70 00:00      

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