I am trying to build a simple circuit that takes a 9v battery through a voltage regulator that outputs 1.5v across a load resistor . The load will be just a piece of metal that gets heated up.
My initial understanding of voltage regulators was wrong. I thought I wouldn't be wasting a lot of power using one, but from further reading I have discovered that they are just used for rectifying an ac source and when (vi-vout) is a large number a lot of power is dissipated/wasted as heat in the regulator. I want as much of the power from the battery as possible to be dissipated across the load resistor @ 1.5v.
So, my questions is how can I build this circuit with a 9v input and a 1.5v across load dissipated as heat with the smallest amount of wasted power through a regulator or other components?