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Forums › Home Workshop DIY › Dumb DC electricity question
mb82

227 posts

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#220325 6-Aug-2017 13:58
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What would happen in the circuit above the blue line?

 

What would happen in the circuit below the blue line?

 

Basically want to connect a 9v battery directly to my car radio 'constant 12v' and 'ground' wires so I don't need the reset code when I disconnect the battery and can't get my head around whether it will blow up or not. 

 

 

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Rikkitic
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  #1839859 6-Aug-2017 14:16
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If you are lucky, you will only destroy the 9 volt battery. If you are not, there will be an explosion and you will destroy your car.

 

In both circuits the 12 volt battery will try to discharge through the 9 volt one because of the difference in potential. The 9 volt one won't like this at all.

 

 




Plesse igmore amd axxept applogies in adbance fir anu typos

 


 

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