[Solved] Boosting Power: Can a 12V DC Computer Fan Handle 30V DC and 0.4A from a Lexmark Printer?

Hello,
I looked at a few topics on the elektroda.pl forum on a similar topic in which experienced users said that you can power a 12V DC (120 mm) computer fan with 12V and 1A current, which gives 12 watts. Now my question is, can I increase the value of the supply voltage to 30V DC and the current to 0.4A (power supply from Lexmark printer) which gives the power of 12 watts. Nevertheless, the tension is raised more than twice.

Hardly any fan will consume 1A. As a rule, they take about 0.5A.
But you can't increase the voltage to 30V anyway.
Most fans will handle around 17V, but not all.

Generally, it should be max 12V +/- 5%

emil362 wrote:

you can power a 12V DC (120 mm) computer fan with 12V and 1A current, which gives 12 watts.

And most importantly, you do not "tell" such a fan to take electricity as much as you want, but he will take himself as much as he needs. You can only enter the correct voltage. Unless the power supply fails to deliver it.
And if you can and how much it has already been written by your friend.

If I connected a 36? 9W resistor in series to the system, would it be a good solution?
Or is it better to use the LM317 stabilizer ???
All this talking about a DC 30V, 0.4A power supply

You are probably thinking about creating a voltage divider out of such a system, where you will treat the fan as a resistor with a resistance of 12 ohms (assuming that the rated voltage is 12V and the current is 1A), to which you connect a 36om resistor in series. Then about 1/3 of the voltage, i.e. 10V, will be deposited on the windmill. Note that the total impedance of the circuit will then be 48 ohms, the power supply has a nominal voltage of 12V so the current forced by such a circuit will be I = U / R approx. 0.65A which means that your power supply cannot handle it. Note also that then only 1/3 of the energy will be used to power the fan, and the rest will be radiated as heat on the resistor. Moreover, the voltage divider is not a very effective power supply due to its low efficiency.

So I have the LM317 stabilizer left.

Ok. without combining, just buy a 12V, 1A power supply.

el LM317 es la mejor opción (con disipador)
yo probé con resistencias en serie y encontré problemas de arraque en algunas marcas de ventilador

The main topic from a few years ago lowers the level of the forum, a new addition is unnecessary.
I'm deleting the topic, trash.