Micro-controller selection

Projects General Guidance
1

I wan to use a PLC to trigger an ESP32/STM32 micro-controller that controls two 24 V RGB LED strips to display a Red → Yellow → Green countdown based on a process signal

  1. Is the Flow chart described below correct?
    2 . Can someone suggest some cheap micro-controller (1 input and 2 or more output) and voltage converter for my case

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2

@ag777 ,

Your topic was moved to its current location as it is more suitable.

Could you also take a few moments to Learn How To Use The Forum.

It will help you get the best out of the forum in the future.

Thank you

3

Your diagram is ok.
Any MCU will work, the Raspberry Pi PICO is under $2 plus shipping from AliExpress.
A Buck converter from many suppliers that can handle at least 24VDC to get 5VDC can be had for about $3USD on Amazon https://www.amazon.ca/CANADUINO-DC-DC-Converter-Output-Terminals/dp/B07B2L1CDT/ref=asc_df_B07B2L1CDT
Change the link to your country.

4

I suggest you get a copy of the Arduino Cookbook and then skim it cover to cover, you should find most if not all of your answer including code and wiring information

5

I would have thought the PLC should be able to do this on its own ?