Low budget antenna analyzer & DDS with AD9850, Arduino and a small OLED
The idea for this analyzer and first documentation I found on http://www.hamstack.com/project_antenna_analyzer.html. Beric Dunn (K6BEZ) did a great job with this analyzer.
My project extends the original analyzer by three buttons, a small OLED (128x64) and a tiny speaker to control and operate without a PC.
Since I am not a professional programmer you may not to use my code to learn how to do it right. ;-)
Key features are:
- Menue to operate with three buttons with
- Graph or text mode
- Start- and stop frequence, sweep steps
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Optional speaker sound on hold frequence with a higher and faster beeps at better SWR (in textmode).
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Simple calibration function
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Store measures VSWR, start- and end frequency, sweep steps in eeprom.
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and for sure optionaly you can use the USB interface to measure, too.
The absolute SWR may not very accurate. But in relative the measure is fine. :)
Atm missing is a detailed information about how to operate (button functions) and the wiring info.
If you are interested please let me know!
Best regards, Stephan (dc8lz)