Hussainb
Member level 2
hello friends,
I recently bought a Chinese mobile phone battery charger, the one in which you have to remove the battery from mobile phone and connect it to the leads of the chinese charger to charge it..
When the battery +ve and -ve terminals are properly touched to the leads of the charger, a red led lights up as an indication that the battery has been properly connected and ready to be charged..
What amuses me is that the charger doesnt need the battery to be connected in proper polarity.. you can connect the battery terminals anyways and the red led lights up and the battery also gets charged!!!
My question...
How is the circuit made? why it doesnt need the battery to be connected in a proper polarity?
how does the red led light up when the battery is connected anyway?
can anyone explain me a circuit which would give a fixed polarity output but the circuits input polarity doesnt matter and can be connected anyways.
thank you
I recently bought a Chinese mobile phone battery charger, the one in which you have to remove the battery from mobile phone and connect it to the leads of the chinese charger to charge it..
When the battery +ve and -ve terminals are properly touched to the leads of the charger, a red led lights up as an indication that the battery has been properly connected and ready to be charged..
What amuses me is that the charger doesnt need the battery to be connected in proper polarity.. you can connect the battery terminals anyways and the red led lights up and the battery also gets charged!!!
My question...
How is the circuit made? why it doesnt need the battery to be connected in a proper polarity?
how does the red led light up when the battery is connected anyway?
can anyone explain me a circuit which would give a fixed polarity output but the circuits input polarity doesnt matter and can be connected anyways.
thank you
