Projects

Arduino + SI4713

Most users of SI4713 - FM Broadcast Stereo/RDS chipset use Adafruit library.

Apr 18 • YO3HJV

Voice Activated Squelch kit

Finally, a project that was on my ToDo list came alive!

Mar 24 • YO3HJV

Yet Another Yaesu ATAS‑120 Controller: Safer, Smarter, Radio‑Agnostic

The Yaesu ATAS‑120 is a compact HF mobile antenna that mechanically tunes across 7–50 MHz by driving a motor to change inductance.

Mar 9

433 MHz LoRa SAW Bandpass Filter

The LoRa network that a team of radio amateurs in Bucharest is testing is - for various reasons - deployed in the 433 MHz ISM band.

Nov 28, 2024 • YO3HJV

Switched Mode Power Supply for Battery replacement in R-105m, R-108m, and R-109m radios

I do have an old Soviet "green radio" R-109m which can cover 21.5 to 28.5 MHz which makes it pretty attractive for playing in the field spooking…

Jul 21, 2024 • YO3HJV

Expansion board for ESP32 D1Mini

Well, after testing a lot of ESP32 development boards, I found that the little ESP32 D1 Mini is an excellent one.

Apr 24, 2024 • YO3HJV

Portable GPS barometer UTC Clock

Often, in portable I have to use the phone to check for Maidenhead QTH Locator and UTC for logging purposes.

Dec 6, 2023 • YO3HJV

Arduino PTT Sequencer for Xiegu G90

Apr 3, 2021 • YO3HJV

Software defined lab power supply

Sometimes in the lab there is need to monitor the power parameters during some period of time and put it on a nice graph.

Feb 24, 2021 • YO3HJV

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