/diy/ - Do It Yourself

>>1905223
>12v at 1 amp would need a 12ohm resistor to produce 12 watts.
Correct
>if you reduce the voltage to 8 volts the amps will still be the same
The amps would fall proportionally (8/12) because the resistance of the heating element hasn't changed
Also: 8V/4ohms = 2A, so it'd be 16Watts

>If OP wants to reduce the amount of heat. The easiest thing to do is reduce the voltage output of the power supply by adding diodes to drop the voltage
Diodes use power too. P=I*V , the same as resistors

>>1900321