Power supply for 4.2

[Richard Seven7seven]

Hello,

I'm busy with my first 4.2 build and trying to determine what power supply to use.

I've got an existing supply which is labelled as a "regulated" 12V 1A supply but when I checked it with a multimeter while connected to 2 x 80mm PC fans (no current rating on them but probably around 0.2A each) it read 13.5V which isn't what I expected from a "regulated" supply?

I'll be using the Auber 6.5cfm blower (https://www.auberins.com/index.php?main_page=product_info&products_id=400) which is rated at 12V.

Will this supply damage the HM and/or blower?

Thanks!

 

[Bryan Mayland]

Yeah that number does seem a bit off for something that's supposed to be 12V, especially with a load on it! The good news is that the HeaterMeter can theoretically take up to 25V input and it will step the voltage down to 5V/3.3V for operation. The blower will be regulated to 12.1V max output as long as "voltage" mode output is selected (and that's the default). So it should be fine as long as the no load output on the power supply isn't over 25V. I can't remember what the value I did long term testing on, either 18V or 20V, and everything performed as expected.

 

[Richard Seven7seven]

Yeah that number does seem a bit off for something that's supposed to be 12V, especially with a load on it! The good news is that the HeaterMeter can theoretically take up to 25V input and it will step the voltage down to 5V/3.3V for operation. The blower will be regulated to 12.1V max output as long as "voltage" mode output is selected (and that's the default). So it should be fine as long as the no load output on the power supply isn't over 25V. I can't remember what the value I did long term testing on, either 18V or 20V, and everything performed as expected.

Thanks for the reply Bryan, that's good news. The no-load voltage is ~13.9V so seems good to go.