Oktober 2018 - Technology-Guerilla

The 555 timer

One of the greatest ICs in history.

http://www.righto.com/2016/02/555-timer-teardown-inside-worlds-most.html

Inside the 555 timer. The tiny die in the package is connected to the 8 pins by wires.

Found https://hackaday.com/2018/10/10/the-555-and-how-it-got-that-way/

DIY LAN CABLE TESTER

https://diy-projects4u.blogspot.com/2018/09/diy-lan-cable-tester.html?_sm_au_=iVVHnM6F3ZRkm6MH

Hardware

https://diy-projects4u.blogspot.com/2018/09/diy-lan-cable-tester.html?_sm_au_=iVVHnM6F3ZRkm6MH

via

Build Your Own LAN Cable Tester