So I have a 12 v 1 amp power supply. I want to convert the current from 1 amp to 0.08 amp and keep the voltage the same. This is for a power a brushless fan; specs 12 v 0.08 amp. I am not sure how to do this. If anyone can help, I would appreciate it a lot.

Thank you

  • 2
    \$\begingroup\$ Thought experiment: How would you convert the 6 A lighting circuit in your house to power a lamp that only needs 0.2 A? (Assume that the light is the correct voltage for your house.) \$\endgroup\$
    – Transistor
    Oct 17, 2020 at 16:44
  • \$\begingroup\$ if you want 80 mA to flow in a 12 V circuit, then you have to present a 150 ohm load to the 12 V power supply .... I strongly suspect that the brushless fan already presents itself as a 150 ohm load \$\endgroup\$
    – jsotola
    Oct 17, 2020 at 18:40

1 Answer 1


You don't need to "convert 1 A to 0.08 A".

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 "converter" 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.

  • \$\begingroup\$ Thank you for clearing that up \$\endgroup\$
    – k084
    Oct 18, 2020 at 0:40

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