This is the final post in my design of an Automatic Antenna Tuner. It's been a long journey, and I've learned quite a bit. And I hope others have found these posts interesting and, perhaps, even useful.
Links to the other posts in this series can be found at the bottom of this post.
This final post contains all of the updated schematics. They have been updated from their "prototype" revisions (the revision they carried when they first appeared in earlier posts in this series, e.g. "Rev. X1") to my "release" revision: Rev. A.
A Note: Click on any image to ENLARGE!
And with that, here are the final schematics:
Directional Coupler
RF Frequency Sampler
Arduino Main
IO Expander 1
IO Expander 2
Hex Switches L
Hex Switches C
Relay Coils 1
Relay Coils 2
Power Supply
That's it. This series is over!
Links to my blog posts in this Auto-tuner series:
Part 1: Preliminary Specification
Part 2: Network Capacitor Selection
Part 3: Network Inductor Selection
Part 4: Relays and L-Network Schematic (Preliminary)
Part 5: Directional Coupler Design
Part 6: Notes on Match Detection
Part 7: The Build, Phase 1
Part 8: The Build, Phase 2 (Integration of Match Detection)
Part 9: The Build, Phase 3 (Incorporating a Microcontroller)
Part 10: The Final Schematics
Links to my Directional Coupler blog posts:
Notes on the Bruene Coupler, Part 2
Notes on the Bruene Coupler, Part 1
Notes on HF Directional Couplers
Building an HF Directional Coupler
Notes on the Bird Wattmeter
Notes on the Monimatch
Notes on the Twin-lead "Twin-Lamp" SWR Indicator
Calculating Flux Density in Tandem-Match Transformers
Standard Caveat:
As always, I might have made a mistake in my equations, assumptions, drawings, or interpretations. If you see anything you believe to be in error or if anything is confusing, please feel free to contact me or comment below.
And so I should add -- this design and any associated information is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
3 comments:
Beautiful project, congratulations!
I didn't find the sketch for the arduino. Is the project open source? I would be interested in building a similar one, but without a sketch ... I have no chance of success.
73's!
Thanks very much, Marius.
No, the Arduino sketch isn't available.
But Part 9 contains a fairly detailed description as to what is going on. If you have even a little experience in coding, I would recommend you try writing your own code. Just take it a step at a time.
Best regards,
- Jeff, k6jca
Hi,
I understand; unfortunately I have no programming experience, I am not a programmer.
I admit that I threw my eyes on some sketches, but I failed to understand the effective logic of moving the relays for coils and capacitors; the rest I understood a little ... at sea.
I plan to build and upload a sketch in arduino.
All the best!
73!
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