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README.md

Antuino

Arduino+Si5351 = Antenna/Network Analyzer

Firmware Upgrade Process

  1. On Windows, install the device driver for the CH340 / CH341 USB controller present on antuino using the following link.

    http://www.wch.cn/download/CH341SER_EXE.html

    Note: A local copy of this driver is now included in this repository.

    On Linux, the CH340 / CH341 USB controller works automatically.

  2. Connect antuino to a PC using a USB A Male to Mini B cable. External DC power is not required for programming the AA.

  3. Install Arduino IDE and open the antuino sketch (antuino_analyzer_27mhz_v2.ino) in Arduino IDE.

  4. In the Arduino IDE, select the following options.

    • Menu > Tools > Board = "Arduino Nano"

    • Menu > Tools > Processor > "ATmega328P (Old Bootloader)"

    • Menu > Tools > Programmers > "AVR ISP"

    This Processor setting is valid for the antuino version that was distributed during LARC 2019 event.

    https://www.arduino.cc/en/Guide/ArduinoNano has some additional details on this Processor setting.

  5. Upload the sketch to antuino using the Menu -> Sketch -> Upload option in the Arduino IDE.

  6. After upgrading the firmware, run the Calibrate SWR menu option on antuino. Note: Keep the antenna disconnected during this process.

  7. Reboot the antuino device. After the reboot, antuino is ready to be used.

Notes on powering antunio

The following power sources are stable:

  • USB 2.0 and USB 3.0 ports on Desktop computers

  • Chinese 6x18650 USB / 9v DC power banks

The following power sources are unstable:

  • Small 9v battery

Notes

  1. Anil Sharma (VU2TFG) reports that antunio SWR values are pretty close to the SWR values shown by GEK - 60MHz Antenna Analyzer by VU3GEK.

    http://homebrewcorner.blogspot.com/p/page-update-642015-need-of-useful-tool.html

    The GEK AA feels pretty solid and has a dual-digit SWR display (e.g. 1.82).

    In comparison, antunio has a single digit SWR display (e.g. 1.8).

    The GEK AA is a fixed-function instrument and can't be programmed. In comparison, the possibilities are endless with antunio.