Here we discuss microcontrollers (MCUs), single board computers (SBCs), and their accessories, such as Atmel mega and tiny AVRs (Arduinos), PICs, ARM boards such as blue/black pill STM32, ESP8266/32s, RP2040, Raspberry Pi, and others.
For general electronics questions (power supplies, level shifting, motor driving, etc.) please ask /ohm/.
>where can I find verified quality microcontrollers and other electronic sensors or parts digikey.com mouser.com arrow.com newark.com
>but that's too expensive aliexpress.com (many parts here are fake, particularly specific parts out of stock in the above sites) lcsc.com
>I need a part that does X and Y, with Z specifications. How can I find it? use DigiKey's or Octopart's parametric part search. Then purchase from one of the sellers listed above.
>how do I get started with microcontrollers, where should I start? There is no defined starting point, grab a book and start reading or buy an arduino off ebay/amazon and start messing around. There are a plethora of examples online to get started.