Breadboard with chips, transistors, connected to parallel …
Have you ever made a homemade computer on a breadboard with old school transistors and other basic electronic components? - Quora
Transistors
Lessons In Electric Circuits -- Volume VI (Experiments) - Chapter 7
Can I use transistors as a way to select and output clock signals? : r/AskElectronics
logic gates with transistors on breadboard
The Astable Multivibrator – Skinny Research and Development
prototyping delay module - noiselab
How To Use A Breadboard - The Beginner's Guide
Breadboard - Wikipedia
830 Hole Breadboard Set for R3 Component Pack Beginner Starter Kit MEGA2560
Simple Circuit: Circuit Expression to Chips on a Breadboard