[bayou]

Hi together.

here i'll introduce two power module which i've found on ALI.
the first one is adjustable and has also fixed voltage output.
https://www.aliexpress.com/item/1PCS-Mini-DC-DC-12-24V-To-5V-3A-Step-Down-Power-Supply-Module-Voltage-Buck/32921883888.html?spm=a2g0s.9042311.0.0.27424c4d2R3chO

the second one.
also very small. "only" adjustable.
https://www.aliexpress.com/item/1pcs-Mini360-DC-DC-Buck-Converter-Step-Down-Module-4-75V-23V-to-1V-17V-17x11x3/32786777084.html?spm=a2g0s.9042311.0.0.27424c4d2R3chO

they are tested in some WPL trucks for the lights. there's no need from resistors

regards
Ulrich

[LukeZ]

Is the idea that you would use these instead of current limiting resistors for LED lights? I guess they are certainly cheap enough.

What other purpose for them do you have in mind?

[bayou]

you can use it for a FPV system. in first line i've tought to such things.
I've them also in WPL-trucks with a various number of LED's. the resistor don't have to be changed.

[LukeZ]

Good point about the FPV, some do require special voltages.

If you have an FPV camera/transmitter that works on 5 volts, I know one user who powered his via the Aux output and so was able to turn on/off the camera from his transmitter that way.