12v car battery. How to lower amperage output for a device?

[Jason Philip]

Buck convwconv, or a simple potential divider, to reduce the output voltage to 2v.

 

[static zap]

Buck convwconv, or a simple potential divider, to reduce the output voltage to 2v.

Buck is close to PWM ,
Potential divider !
(but where does the other 10V at 1A go with a potential divider)
(unless thats a 2nd low wattage heater)

 

[Jason Philip]

Buck is close to PWM ,
Potential divider !
(but where does the other 10V at 1A go with a potential divider)
(unless thats a 2nd low wattage heater)

Into the resistors, he says it's a 6amp draw at 12v, so the device uses 72watt, and has a 2ohm resistance. if he want's it to draw just 1a then he can put resistors in series, and make a potential divider that will have an overall resistance of 12ohm, including the heater device, the overall wattage will be reduced to 12w, 2 watt to the device and 10w dissipated into the resistors, the whole circuit now uses 1/6th of the device original consumption, honestly though, I am just theorising and given the OP lack of explanation or answer on this thread, I'm not sure this is even a real scenario.