The Last (I Think) Low Level Circuits

• The demo file.
• Transistors
  • A transistor is an electronic switch
  • There are two types, NPN and PNP
  • Each has a Base, an Emitter and a Collector
  • The current at the base controls the switch
  • When the switch is enabled current flows from the collector to the emitter
  • For a PNP
    • 
    • When no charge is applied to the base, a current flows from the emitter to the collector.
    • When a charge is applied, no current flow occurs.
  • For an NPN
    • 
    • When no charge is applied to the base, no flow occurs.
    • When a charge is applied to the base, current flows.
  • The 32 core AMD Epyc has nearly 20x10⁹ or 20,000,000,000 transistors.
• Circuits from transistors.
• RS filp Flop
• D Flip Flop
• A register.