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12/30/04 10:01
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#84094 - Alternative ICs wanted
Hello
Iam implementing a Temperature and humidity controller using At89c52
iam using a A/D converter at the sensor and a D/A convereter at the output At the DAC output, I am providing a simple electronic circuit to provide a 4-20ma current output using a circuit with NFET(TL032&TL034)(or some one can provide me the alternative ICs )
and TN0104 TN0106 (If any body wants the circuit i can mail to him.
The algorithm iam using is a PID control algorithm.


*I want to know how to implement a watchdog timer externally (or using software)or internally(I Dont want to change the microcontroller AT89C52).

*I want alternatives for the above mentioned Ics which are avilable
in bombay(India).

I can mail the circuit and further details i have designed if you want for better clarification .


with regards

Suhail

praise me to lord

List of 8 messages in thread
TopicAuthorDate
Alternative ICs wanted            01/01/70 00:00      
   Re.: Alternative ICs wanted            01/01/70 00:00      
      Watchdog + Reset generator            01/01/70 00:00      
         NVSRAM+WD            01/01/70 00:00      
      Good Reply.            01/01/70 00:00      
      Often a FET-OPamp is needed            01/01/70 00:00      
   WatchDogTimer made using 14538 ic            01/01/70 00:00      
   alternatives            01/01/70 00:00      

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