How to reduce current without affecting voltage for powering a fan?
You don't need to &quot;convert 1 A to 0.08 A&quot;.
1 A is the MAXIMUM current that this power supply can provide.
If a car can get to a MAXIMUM of 100 mph, you don't need a &quot;converter&quot; to have this car cruising at 50 mph.
If you connect your 12V 1A supply to a load that needs 12 V, 0.08 A, the load will use only the 0.08 that it needs.
But, beware: some power supplies need a minimum load to achieve the correct output voltage.