CVARS K7PG           CVARS    K7PG
  The Chehalis Valley
 Amateur Radio Society
A  501(c)(3) Non-profit 		          
 
 

Electronics Workshop - April 30, 2026

Time & Location:

Topics:
  1. NE555
  2. Thermal Fuse

  3. Potpourri
    1. Morse Code Coin
    2. APRS over VARA
    3. Windows Security

Notes:
NE555:
  1. "Three Fives" Discrete 555 Timer Kit Assembly Instructions:
    https://cdn.evilmadscientist.com/KitInstrux/555/555_instrux_RevB1.pdf
  2. "Principles of Operation":
    https://cdn.evilmadscientist.com/KitInstrux/555/555_principles_rev30.pdf
  3. "The 555 IC":
    https://www.talkingelectronics.com/projects/555/Page1-555.html
  4. "555 Timer Circuits":
    https://www.555-timer-circuits.com/
  5. "Visual 555 Timer Calculator":
    https://visual555.tardate.com/
  6. "Using the 555 Timer IC in Special or Unusual Circuits":
    https://visual555.tardate.com/
Thermal Fuse:
  1. Sensience Microtemp Thermal Fuses Application Notes:
    https://www.sensience.com/wp-content/uploads/2025/01/Thermal-Fuse-Application-Notes.pdf

Potpourri
Morse Code Coin:
  1. Lots of Morse Code Coins listed on Amazon:
    https://www.amazon.com/s?k=Morse+Code+Coin
APRS over VARA:
  1. Announcement on Groups.IO:
    https://groups.io/g/UI-View/topic/announcing_the_varatrack/118896276
  2. WA8LMF's VARA web page:
    http://wa8lmf.net/VARA/
  3. WA8LMF's VARA Track web page:
    http://wa8lmf.net/VARA/VARAtrack/index.htm
  4. Goleminipc web page:https://goleminipc.com/
Windows Security:
  1. Windows Secure Boot Certificate Expiration:
    https://support.microsoft.com/en-us/topic/windows-secure-boot-certificate-expiration-and-ca-updates-7ff40d33-95dc-4c3c-8725-a9b95457578e

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