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07/28/06 08:24
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#121246 - What happens if this resistor blows?
Hello Forum

I am posting here a schematic of a very simple Triac circuit which is being used in this case to run an AC motor. The problem I am having is that in couple of circuits the motor ran for about 30 sec and then the opto-traic and 51 Ohm resistor just blew and went up in smoke. When I checked the circuit, 330 Ohm resistor was not connected properly. I am just trying to find out what purpose 330 Ohm resistor has here, what will happen if that resistor is short or blown?
The opto-traics top was completely blown so there must be high current passing through it, but from where?

Please comment.

Much Obliged

Kaz



List of 15 messages in thread
TopicAuthorDate
What happens if this resistor blows?            01/01/70 00:00      
   I think........            01/01/70 00:00      
      yes I am sure            01/01/70 00:00      
         Its wrong            01/01/70 00:00      
            Great link!            01/01/70 00:00      
   Wrong driver!            01/01/70 00:00      
   What sort of motor are we talking about?            01/01/70 00:00      
      motor type and more info            01/01/70 00:00      
         More background            01/01/70 00:00      
            re: more background            01/01/70 00:00      
               App notes.            01/01/70 00:00      
   More!            01/01/70 00:00      
      back to back.            01/01/70 00:00      
      Thanks Guys            01/01/70 00:00      
         Luck            01/01/70 00:00      

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