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???
11/22/14 20:27
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#190392 - Yes
Responding to: ???'s previous message
Since there is a resistor on the emitter of Q1 you can connect it directly to the base but it is better to use a series resistor to protect the uController pin.
You should also put pull down resistor on the base of Q1 to make sure it stays off once the micrcontroller in reset or undetermined state.
Mahmood

List of 15 messages in thread
TopicAuthorDate
Car amp remote signal            01/01/70 00:00      
   use a relay            01/01/70 00:00      
      There is other option than relay?            01/01/70 00:00      
         Hi Power            01/01/70 00:00      
            Let me explain a little...            01/01/70 00:00      
         plenty, but ....            01/01/70 00:00      
            I understand...            01/01/70 00:00      
   Little update about involved currents            01/01/70 00:00      
      if it is 12V hi/lo and less than 200mA            01/01/70 00:00      
         Amp needs 12v for switching            01/01/70 00:00      
            2 transistors            01/01/70 00:00      
               You mean this one?            01/01/70 00:00      
                  Yes            01/01/70 00:00      
                     Thank you!            01/01/70 00:00      
            follow the logic            01/01/70 00:00      

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