- https://www.pcbway.com – a really good & cheap PCB manufacturer; it’s my favourite PCB service, their quick delivery saved my deadlines; see my review
- https://hackaday.com – a lot of articles about microcontroller-based projects, but not only! Great website
- http://www.technoblogy.com – [David Johnson-Davies]’s website about Arduino and AVR; a lot of interesting projects; David is well skilled electronics designer and really good writter
- http://www.georgegardner.info – [George Garden]’s website about electronics; many interesting AVR/Arduino projects but not only! I really like revisiting his website
- http://tomeko.net – [Tomek Ostrowski]’s website about electronics and software; one of his design is cool oscilloscope “Miniscope” based on STM32F042
- https://ralphbacon.blog – [Ralph S Bacon]’s website about microcontrollers; great video tutorials on YT
- https://onecircuit.blogspot.com – [Anthony Peck]’s website about electronics
- https://rk.edu.pl – [Piotr Malinowski]’s website about Python, RaspbereyPi and microcontrollers; Piotr has an amazing Python skills
