rudy wrote:I often will need 5 volts in my designs so I use a switcher to go from 12 to 5. Then I use a linear regulator to provide the 3.3 volts. If I don't need an intermediate voltage then I have also used switchers to go directly to 3.3 volts. But make sure that whatever approach you use that the devices are rated for at least 1/2 an amp at 3.3 volts.
With your linear regulator it has to dissipate three times the power that the ESP module is using. Yes it will get hot.
https://www.aliexpress.com/item/3pcs-1A ... 53201.html
Thanks for the answer!
I do not understand what you mean by"But make sure that whatever approach you use that the devices are rated for at least 1/2 an amp at 3.3 volts."
In my project I need 5v. But the important part is that it has 3.3v and does not get too hot.
Is it interesting to use an LD1086 regulator to convert from 12v to 5v and then use a 1117 regulator to convert to 3.3v?
I found the link you sent me very interesting! is really small! I could absorb this circuit for my board, copy the components to my circuit ... is it a switcher regulator in the link ?? I read that switcher controllers are heat efficient but generate noise and do not recommend using. can you explain more?
Tks !!