anantvnori
New Member
Hello,
Some adapters have the option of varying the voltage of the output i.e. for example i have an adapter which gives a 1.5V,3V,4V,6V,9V output. How are these variable output voltages obtained? Changing the no. of turns of the transformer is not practical. One method could be having a series of resistances and then taking the voltages from each of the resistors to the ground. But i opened the adapter and this isn't what is done. There are numerous taps from the transformer but unfortunately i couldnt observe them as the wires had come off! So how is the voltage varied?
Also some adaptors have a polarity switch. What is this switch for??
Thanks
Some adapters have the option of varying the voltage of the output i.e. for example i have an adapter which gives a 1.5V,3V,4V,6V,9V output. How are these variable output voltages obtained? Changing the no. of turns of the transformer is not practical. One method could be having a series of resistances and then taking the voltages from each of the resistors to the ground. But i opened the adapter and this isn't what is done. There are numerous taps from the transformer but unfortunately i couldnt observe them as the wires had come off! So how is the voltage varied?
Also some adaptors have a polarity switch. What is this switch for??
Thanks