Can we PWM an LED backlight on LCD module

[Demon]

Ooops, just to clarify, that 24V is the title of that schematic.

I will be using 12V wall adapters, maybe even 9V to minimize heat (if I can find a good deal).

My circuits are exclusively 5V.

So far I have:

- 3 LED strips consuming about 175mA (525mA)
- 4 LCDs consuming about 130mA, datasheets are vague, just received some samples for testing (520mA)
- 21 conventional LEDs (420mA)

So about 1500mA, but I don't like running components at peak. I prefer to run stuff at 50% at the most, ideally 20-30%.

Without intense searches, 12V 3A goes for $6, 12V 5A goes for nearly double at $12:
https://www.aliexpress.com/item/32859196804.html

I will be making a RFQ on Alibaba later; they tend to be 5-10 times less, but you have to buy more.