Laboratory

Make your Lab Power Supply to log values
Well, I had a spare INA219 module and an ESP32 board and I said to myself, why don’t I made something to keep track for the current consumption of…
 • YO3HJV
Xiegu G90 squawk at high volume
On the G90 Groups is an interesting discussion about an audio feedback (squawk) at high volume.
 • YO3HJV
Baofeng DM-32 Desktop Charger YPT-C21A
Baofeng DM-32 desktop "charger" isn't a proper charger but a desktop stand with a charging indicator.
 • YO3HJV
A GNSS Disciplined CTCSS, DCS and DTMF generator based on ESP32
Let me present a project to both show off and because it might be useful to others, a GNSS disciplined CTCSSDCS and DTMF generator.
 • YO3HJV
Arduino Based Repeater Controller
A request from a fellow ham made me revisit an old project, and Arduino based repeater controller.
 • YO3HJV
Xiegu G90 - O defectiune tipica
Micul transceiver Xiegu G90 este unul foarte indragit de radioamatorii carora le place sa iasa in natura.
 • YO3HJV
LoRa APRS with Meshtastic DevBoard
After I played a little with my Meshtastic Development Board I previously made (and write about) I decided it will be nice to give it a try into LoRa…
 • YO3HJV
Heltec V3 versus LilyGo LoRa T V2 comparision table
These are two LoRa development boards and both are good for Meshtastic networks.
 • YO3HJV
Kenwood TH-D74 battery indicator and some battery measurements
During the years of use of my Kenwood TH-D74 I noticed that the battery indicator is a little bit confusing.
 • YO3HJV
ADC. Rezolutii si Volti
ADC-urile convertesc eșantioanele unui semnal analogic în valori digitale.
 • YO3HJV
TC4056 1 cell LiIon charger module
I have a lot of those little boards made around a TP4056 IC.
 • YO3HJV
Xiegu G90 Full schematic
Finally, the schematic of Xiegu G90 is available!
 • YO3HJV
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