To have a stable 10MHz reference in my shack, I've ordered a SYMMETRICOM based GPSDO from an Chinese eBay seller. It was delivered in kit form, so no issues with missing CE marking etc.

The GPSDO is build into a sturdy aluminium case with a PCB front panel and an aluminium back panel.

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Kategorie: GPSDO

The Nextion display needs the content defined in the file PowerMeter.HMI. You can either upload it with the Nextion editor via a serial link to the display or you can copy the TFT file to an SD card and put this into the socket on the Nextion display.

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Kategorie: RF Powermeter

With the firmware version 1.8.0 I've introduce the capability to display also the input power in Watt instead of dBm. Simply tap on the unit field on the display to toggle between dBm and Watt.

Details
Kategorie: RF Powermeter

I've introduced with the firmware version 1.7.1 a complexity to this project which may not be suitable to all users.

WIth the firmware version 1.7.2 I've reduced the complexity by removing the remote configuration utilities.

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Kategorie: RF Powermeter

If you are using my powermeter software in conjunction with Maki's module and have a unstable readings or sporadic extrem value changes, this is a problem of the CS pin. It may be a grounding issue - Makis is currently analysing the problem.

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Kategorie: RF Powermeter

I've developed a new firmware for my RF Powermeter. In this firmware, the user can now program for six calibration points the factors for the polynimial regression functions.

Therefor I've developed a JAVA GUI application for downloading these floating point values to the device.

*** CAUTION ***
All stuff described in this post is ONLY running on an Arduino which runs the OptiBoot bootloader. The EEPROM capability of the OptiBoot bootloader is needed for the features of firmware V1.7.1

I described here a way how to flash the OptiBoot loader on an Arduino UNO clone. For this you need an ISP or a second Arduino to act as an ISP.

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Kategorie: RF Powermeter

I've added a new feature to the firmware release 1.5.0 V1.5 1 - power offset V1.5 3.

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Kategorie: RF Powermeter

The original library from Dan is not working as expected for me. So I adopted the code a little bit.

You can find the changes below. You can also download "my version" of the library here. Unzip into the Arduino's library folder.

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Kategorie: RF Powermeter

As described here, I've build an RF Powermeter.

The basic firmware is now running. So I started analysing the accuracy of the used meter head.PowerDev

Details
Kategorie: RF Powermeter

  1. SOTA - Flight deck for KX3
  2. SOTA - DM/BW-094 - Kornberg
  3. SOTA - DM/BM-344 - Kleiner Kulm - My first activation is done
  4. SOTA - Working conditions
  5. Switch-mode DC-DC converter
  6. Frog Sounds - Spurious emissions
  7. Frog sounds - The frog has arrived
  8. Frog sounds - How far can you hear a frog croak?
  9. Frog Sounds - Enhancements to the Frog
  10. Miss Mosquita - a new girl in town
  11. WSPR live data
  12. WSPR some data
  13. RF detectors
  14. WSPR first data analysis
  15. WSPR data collector
  16. PiAware
  17. vna/J ist umgezogen
  18. vna/J moved to a new location
  19. Reflash Arduino UNO ATMEGA16U2
  20. IoT Powersensor #2
  21. IoT Powersensor #1
  22. Arduino Library for AD7887
  23. RF Duinode
  24. ADS-B Filter
  25. IoT System management
  26. IoT MQTT Infrastructure
  27. IoT MQTT configuration
  28. ELECRAFT K-POD
  29. Rotator control with a NodeMCU runs stable
  30. Detailed measurement on audio CW-filter

2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.

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