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Chico Magalh„es
11/20/14 20:39
Read: 792 times
Florianůpolis
Brazil


 
#190385 - Let me explain a little...
Responding to: Mahmood Elnasser's previous message
Car amp draws lots of current, this is right.
But, car amps have a special input to switch it on and off, it is called "remote" AFAIK
Car amps on its power socket has 3 inputs: positive, negative and remote.

This remote input is low power.
When there is 12v in remote input car amp is on.
I dont know how much current is involved, I have searched and not found but I believe it is lower than 200mA, probably just enought to switch a small relay inside the car amp.

Mahmood, I cant find any small P channel MOSFET, the ones I found (over internet) were expensive.
AFAIK I need a P channel one.

(sorry for any mistake).

List of 15 messages in thread
TopicAuthorDate
Car amp remote signal      Chico Magalh„es      11/14/14 19:13      
   use a relay      Erik Malund      11/17/14 09:00      
      There is other option than relay?      Chico Magalh„es      11/19/14 22:37      
         Hi Power      Mahmood Elnasser      11/20/14 06:04      
            Let me explain a little...      Chico Magalh„es      11/20/14 20:39      
         plenty, but ....      Erik Malund      11/20/14 07:43      
            I understand...      Chico Magalh„es      11/20/14 20:41      
   Little update about involved currents      Chico Magalh„es      11/20/14 23:29      
      if it is 12V hi/lo and less than 200mA      Erik Malund      11/21/14 07:51      
         Amp needs 12v for switching      Chico Magalh„es      11/21/14 13:46      
            2 transistors      Mahmood Elnasser      11/22/14 11:40      
               You mean this one?      Chico Magalh„es      11/22/14 12:21      
                  Yes      Mahmood Elnasser      11/22/14 13:27      
                     Thank you!      Chico Magalh„es      11/27/14 14:09      
            follow the logic      Maarten Brock      11/29/14 01:45      

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