3v step down from 12v

[bidrohini]

hi
all my projcets are run on 12v adaptors leds and mini motors
i want to add 3v leds to my display
is this the board i can use to boost up safely?

https://www.aliexpress.com/item/1005006379415643.html?spm=a2g0o.productlist.main.3.416e4db1BDfCxj&algo_pvid=09940bf2-eff9-44d3-9f06-ff273c4c0494&algo_exp_id=09940bf2-eff9-44d3-9f06-ff273c4c0494-1&pdp_npi=4%40dis%21USD%213.16%211.04%21%21%2122.65%217.43%21%40211b801717083301048224328e4ec9%2112000036962762116%21sea%21IL%21133542592%21&curPageLogUid=T5ehcTemX3Fc&utparam-url=scene%3Asearch%7Cquery_from%3A

The one in your link is a boost/step up converter. You do not need this. If you want to step down from 12V to 3V, you need a buck converter. That is also called step down converter. You can use an LM2596. You can design a module with LM2596 like this. With the LM2596 Adjustable DC-DC Converter, you can regulate input voltages between 4V DC - 35V DC in the range of 1.23V DC - 30 VDC. You can adjust the output voltage according to your desire with the trimpot on it. This module, which is very useful with its small dimensions, contains LM2596 regulating integration. The circuit can carry current up to 3A DC. A small 30 mV deviation margin provides a great advantage over other DC-DC converters.

-Buck Converter LM2596 - Share Project - PCBWay

BUCK CONVERTER LM2596 Voltage Reducer Adjustable Power Module “With the LM2596 Adjustable DC-DC Converter, you can regulate input voltages between 4V DC - 35V DC in the range of 1.23V DC - 30 VDC. You...

www.pcbway.com

 

[Bluejets]

The one in your link is a boost/step up converter. You do not need this. If you want to step down from 12V to 3V, you need a buck converter.

Already covered in #19.....