YO3HJV
Hamradio, Electronics& Stuff
XIEGU G90 Collection
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Full schematics
Block Diagram and Schematic
G90 Faults and mitigation
Reflashing the Bootloader
Audio Amp Gain Mod
Power supply section
SMPS regulators instead of LDO
"COMM LOST" Error
MCU and DB9 reference
External Speaker Mod
Firmware Programming Cable Schematic
High Resolution Pics
Power Output vs Supply Voltage
Front Panel Backlight
ATU issues
ICOM RJ-45 Microphone with G90
Disassembly the Front Panel of G90
VFO encoder selection
On screen voltmeter
Repair Manual by XIEGU
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25 July 2025
A GNSS Disciplined CTCSS, DCS and DTMF generator based on ESP32
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Let me present a project to both show off and because it might be useful to others, a GNSS disciplined CTCSSDCS and DTMF generator. Wh...
16 July 2025
Debugging ESP32 Timer Interrupts: A Tale of API Compatibility
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The Silent Signal Generator Have you ever spent hours debugging code that should work but doesn't? Recently, I faced this exact c...
30 June 2025
Transmițătorul DSB „El Silbo” - AA1TJ
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Michael Rainey, cunoscut sub indicativul AA1TJ, este un cunoscut operator radioamator american, inginer și pasionat de homebrew minimalist...
27 June 2025
Arduino Based Repeater Controller
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A request from a fellow ham made me revisit an old project, and Arduino based repeater controller. This lead to an iterative process to up...
21 April 2025
Project "Router" - 1
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First is first... const int uartPins [ 4 ][ 2 ] = { { 3 , 1 } , // PC: RX=GPIO3, TX=GPIO1 (default Serial) { 16 , 17 } , // U_1...
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