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???
09/30/10 22:18
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#178808 - Try this
Responding to: ???'s previous message
Richard:
For low bandwidth signals you may be able to make the analogue output by using a timer to produce a PWM signal that you vary the duty cycle according to desired analogue value. Then filter the PWM voltage into an analogue value with an low pass filter. Best situation since the analogue wants to be an output fed off someplace else is to use an op-amp to buffer out the signal. The filter could simply be an R/C circuit followed by the op-amp as a simple buffer. More complex op-amp configurations as a low pass filter could also be used.

Michael Karas


List of 25 messages in thread
TopicAuthorDate
What would you use?            01/01/70 00:00      
   Try this            01/01/70 00:00      
   Another query            01/01/70 00:00      
      If even you Americans don't understand each other...            01/01/70 00:00      
      My point was ...            01/01/70 00:00      
         PSoC            01/01/70 00:00      
            The display is really simple            01/01/70 00:00      
            there is a '51 PSoC            01/01/70 00:00      
               8051=PSoC3            01/01/70 00:00      
   There are several ways...            01/01/70 00:00      
      It's going to have to be a delicate introduction to MCU's            01/01/70 00:00      
         parametric search            01/01/70 00:00      
            Couldn't find that ... this time            01/01/70 00:00      
            built-in DAC            01/01/70 00:00      
               also in some 3xx's            01/01/70 00:00      
                  C8051F330-GP            01/01/70 00:00      
                     I've decided that's a good choice            01/01/70 00:00      
                        Maybe drive LEDs without LED driver?            01/01/70 00:00      
                           I haven't yet considered that ...            01/01/70 00:00      
   Analog DevicesADUC814            01/01/70 00:00      
      That's one of the sheets I sent him            01/01/70 00:00      
         2 chips maybe better            01/01/70 00:00      
   what resolution?            01/01/70 00:00      
      They're under consideration            01/01/70 00:00      
         '51 with d to a            01/01/70 00:00      

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