Edway Topics

10/13/2022, Revised 09/13/2013

These are various selections for possible EDWAY Club Presentations, by WA7RSO - 10/13/2022 {15}

• EDWAY N7EDW Recordings
• Looking Back a Few Years
• Early Logic
• Neat Tricks
  • Db's without calculators or formulas ("Interpolating", a technical word for educated guessing)
  • Estimating Parallel Resistors without formulas or calculators
  • See also Estimating in "Solutions-For-Education.com")
• Study guides for HAM Licenses
• New Total Re-Write of the "Sound_Bites"
  • >200 Sound Bites, incorporating 8 different WPM Speeds, for >2,000 variations
  • 01/06/2021 - The Methodologies over the years behind the construction of the Sound Bites
• 02/03/2021 - Review of Series and Parallel Circuits, especially the Ladder Circuit
• 02/11/2021 - DB's the Easy Way (_.pdf)
• 03/03/2021 - "Outlines" and Taking a look at just a few of many Filters
• Reactance Considerations
  • Filter_Circuit_Illustrations (lots of links)
• 04/07/2021 - Getting Started with Arduinos
• 05/05/2021 - A Glimpse at Power Supplies
• 06/03/2021 - 'Constant Current Sources' to 'Capacitors and Inductors'
• The Description of the Schematic in QST-BYI--Sept, 2020 - Page 30
  • "TTL Thresholds"
• "The Two Puzzles" ( Fictional ~5 minutes)
  • "ELI" for Pure Inductance (90 Degree Phase Shift)
  • "ICE" for Pure Capacitance (90 Degree Phase Shift)
• Explaining Reactance
  • Static vs Dynamic Considerations (pdf / html)
• Taking advantage of the MFJ-269 and other Antenna Analyzers
• 10/13/2022 - Logic Circuit Presentation and Info on the Lunar Lander and AWACs
• Introduction to Gate Functions, Logic Functions
• More Detailed Gate Descriptions and Schematics with Labs

  Gating Logic - Functions - Coincidence - Controls
  Initial	By Functions	Multiple Inputs	Multiple Controls
  Basic Gates	Gate Functions	Coicidence Gating	Enable and Inhibit Controls

  Enable and Inhibit Controls
  Enables	Example 1	Example 2	Example 3	Example 4
  Inhibits	Example 5	Example 6	Example 7	Example 8

•    Muti-Mode-Keyer - Circuit Description, Schematics, Software

  Tri-Mode Keyer Version History
  Early Tri-Mode before 1973	Tri-Mode 1973	Current with Arduino	Current 44-Pin Cards	Current 44-Pin Cards & CPU
  "Tri-Mode" Wire-Wrap (Transistorized)	"Tri-Mode" - TTL	Logic Module with Mega Timing	Logic_Module, & Timing_Module	Logic_Module & Timing_Module with CPU (extra inputs & control)

• "Digital Lab" Pages:
  • DigitalLabs2 - Connective Gating of NAND's NOR's
  • DigitalLabs3 - Exclusive-OR Circuits
  • DigitalLabs4 - Data Latches & R-S Flip-Flops
  • DigitalLabs5 - J-K Flip-Flop Considerations
  • DigitalLabs6 - Timer Circuits - One-Shots/Single-Shots, Free-Running