Education

EEVblog – Sydney, Australia
https://www.eevblog.com/
Electronics Engineering and Design.
https://www.eevblog.com/wiki/
https://en.wikipedia.org/wiki/David_L.Jones(video_blogger)
https://www.youtube.com/@EEVblog/
Lookups
Roy J. Tellason’s Table of Major Semiconductor Manufacturers Logos and Websites
https://rtellason.com/semiconductorlogos.html
Elnec’s Table of Programmable IC Logos and Info
https://www.elnec.com/en/support/ic-logos/?method=logo
Calculators
Digi-Keys List of Online Conversion Calculators
https://www.digikey.com/en/resources/online-conversion-calculators
Ohm’s Law Calculator
Suppliers
Digi-Key Electronics – Thief River Falls, Minnesota
https://www.digikey.com/
Amateur Radio Roots.
https://media.digikey.com/pdf/Careers/TRF-Welcome-Packet.pdf
https://en.wikipedia.org/wiki/Digi-Key
Mouser Electronics – Mansfield, Texas
https://www.mouser.com/
No longer produce a catalog in print or online.
https://www.mouser.com/contact/
https://en.wikipedia.org/wiki/Mouser_Electronics
PCB Manufacturers
PCB Way – Shenzhen, China
https://www.pcbway.com/
One-stop solution for PCB manufacturing and assembly.
https://www.pcbway.com/capabilities.html