CVARS WA7UHD

CVARS
The Chehalis Valley
Amateur Radio Society
WA7UHD

ARRL special service club




Electronics Workshop - February 23, 2017

Time & Location:

Topics:
  1. Storing Wire Antennas
  2. Charging Batteries
  3. Using PC Power Supplies

Notes:


Reference:
  1. Inverted V Antenna:
    http://www.creative-science.org.uk/invertedv.html
  2. SOTA Antenna Winder:
    https://arduino-info.wikispaces.com/
  3. 18650 Lithium Battery Charger (uses B3603 power supply; ACS712 Hall effect current sensor or INA219 current and voltage sensor):
    http://henrysbench.capnfatz.com/henrys-bench/arduino-projects-tips-and-more/
  4. NiMH Battery Charger:
    https://www.allaboutcircuits.com/projects/create-an-arduino-controlled-battery-charger/
  5. Solar Powered Charger:
    http://www.bristolwatch.com/solar_charger.htm
  6. ATX Power Supply Connectors:
    https://www.lifewire.com/atx-power-supply-pinout-tables-2624590
  7. ATX Voltage Tolerances:
    http://www.formfactors.org/developer\specs\atx2_2.pdf
  8. LM317 Adjustable Regulator:
    http://www.ti.com/lit/ds/symlink/lm117.pdf
Used PC Power Supplies:
  1. RePC; 510 Andover Park W; Tukwila
       Mon-Sat 10-7
  2. Green PC; 3627 S 54th St; Tacoma
       Mon-Fri 9-7; Sat 11-6
  3. Oly Geek; 115 NE Olympia Ave; Olympia
       Tue, Thu, Sat 1-7; Sun 1-4; (Mon, Wed, Fri 1-7 Call)

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