{"id":471,"date":"2021-07-31T16:02:35","date_gmt":"2021-07-31T16:02:35","guid":{"rendered":"https:\/\/vk6gmd.com.au\/?p=471"},"modified":"2021-07-31T16:08:29","modified_gmt":"2021-07-31T16:08:29","slug":"screwdriver-dipole-antenna-tuner-project","status":"publish","type":"post","link":"https:\/\/vk6gmd.com.au\/index.php\/2021\/07\/31\/screwdriver-dipole-antenna-tuner-project\/","title":{"rendered":"Screwdriver Dipole Antenna Tuner Project"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.9.10″ _module_preset=”default”][et_pb_row _builder_version=”4.9.10″ _module_preset=”default”][et_pb_column _builder_version=”4.9.10″ _module_preset=”default” type=”4_4″][et_pb_text _builder_version=”4.9.10″ _module_preset=”default” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n

    \n
  1. Scope of document <\/strong><\/li>\n<\/ol>\n

    Building an automatic antenna controller for two screwdriver antennae, mounted semi-colinear with facing mount points. Identification of required concepts, description and design of hardware and software components.<\/p>\n

      \n
    1. Required functions\/features<\/strong><\/li>\n<\/ol>\n

      \u00a0<\/strong>Hardware aspect<\/strong><\/p>\n

        \n
      1. a) Driving motors of each antenna with recognition of start and end position<\/li>\n
      2. b) Variable motor speed for fine tuning of the antennae<\/li>\n
      3. c) Counting motor revolutions when antenna is moving<\/li>\n
      4. d) Measuring forward and reflected power for SWR calculation and automatic fine tuning<\/li>\n
      5. e) Measurement amplifier for output of directional coupler with range switch for 0-200W and 0-2000W<\/li>\n
      6. f) Tuning module with relays for matching capacitors when required<\/li>\n
      7. g) Serial interface for CAT commands from Transceiver<\/li>\n
      8. h) Second serial interface to relay CAT commands to amplifier if required<\/li>\n
      9. i) Ethernet interface for remote control<\/li>\n
      10. j) USB interface for firmware updates<\/li>\n
      11. k) Serial interface for touch screen<\/li>\n
      12. l) Parallel interface for keypad<\/li>\n
      13. m) Touch screen for display and control<\/li>\n<\/ol>\n

        \u00a0Software aspect<\/strong><\/p>\n

          \n
        1. a) Turn count and matching C memory (min, max) for each band, 160m, 80m, 40m, 30m, 20m, 17m, 15m, 12m, 10m<\/li>\n
        2. b) Calibrate to 0 when power off at bottom<\/li>\n
        3. c) Remember position when powered off<\/li>\n
        4. d) Speed control for motor, slow for fine tuning<\/li>\n
        5. e) Monitor motor voltage and stop motor power when at top or bottom<\/li>\n
        6. f) Allow entry of turn count via keypad<\/li>\n
        7. g) Manual control for each antenna (Up, Down, Park)<\/li>\n
        8. h) Mode for single antenna and dipole antenna<\/li>\n
        9. i) Store SWR for each band and tune when saved<\/li>\n
        10. j) Store recent SWR for each band<\/li>\n
        11. k) Separate memories for different whip sizes<\/li>\n
        12. l) Seek function (slow motor) for each band<\/li>\n
        13. m) Count range for seek function<\/li>\n
        14. n) Web interface for stored value display<\/li>\n
        15. o) Web interface for change of settings<\/li>\n
        16. p) Web interface for remote control<\/li>\n
        17. q) Reading band changes of transceiver via serial interface<\/li>\n
        18. r) LCD display output for settings and value visualisation<\/li>\n
        19. s) Touch display functions for manual control and display screen selection<\/li>\n<\/ol>\n

          \u00a0\u00a0Hardware components \/ modules<\/strong><\/p>\n

            \n
          1. Arduino Mega<\/li>\n
          2. Ethernet shield<\/li>\n
          3. Relay Board<\/li>\n
          4. Display adapter<\/li>\n
          5. SWR bridge<\/li>\n
          6. 4D touch screen<\/li>\n
          7. Foil keyboard<\/li>\n
          8. Power supply, regulated 7V (Arduino)<\/li>\n
          9. Power supply, regulated 12V (SWR Bridge)<\/li>\n
          10. Power supply, regulated 5V (Display, other components)<\/li>\n
          11. Power supply 6-12V with digiPot for variable motor speed<\/li>\n
          12. Flip\/Flop switch for momentary power button<\/li>\n
          13. Measurement amp for SWR bridge output (2 channel op-amp amplifier)<\/li>\n
          14. Current meter for motor drive current (2 channel \u2013 one for each antenna)<\/li>\n
          15. Matching module with relays and capacitors for automated capacitive matching<\/li>\n<\/ol>\n

             <\/p>\n

            [\/et_pb_text][et_pb_image src=”https:\/\/vk6gmd.com.au\/wp-content\/uploads\/2021\/07\/block_diagram.jpg” _builder_version=”4.9.10″ _module_preset=”default” title_text=”block_diagram” hover_enabled=”0″ sticky_enabled=”0″][\/et_pb_image][et_pb_text _builder_version=”4.9.10″ _module_preset=”default” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n

            Display Screen Design<\/strong><\/p>\n

            Some first designs for the 4.3″ touch screen. Will be refined and extended.<\/p>\n

            \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\"<\/p>\n

            [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

            Scope of document Building an automatic antenna controller for two screwdriver antennae, mounted semi-colinear with facing mount points. Identification of required concepts, description and design of hardware and software components. Required functions\/features \u00a0Hardware aspect a) Driving motors of each antenna with recognition of start and end position b) Variable motor speed for fine tuning of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/posts\/471"}],"collection":[{"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/comments?post=471"}],"version-history":[{"count":3,"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/posts\/471\/revisions"}],"predecessor-version":[{"id":679,"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/posts\/471\/revisions\/679"}],"wp:attachment":[{"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/media?parent=471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/categories?post=471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vk6gmd.com.au\/index.php\/wp-json\/wp\/v2\/tags?post=471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}