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DB4020 Firmware V 1.0
This is the first firmware version for DB4020 dual-band transceiver (ATMEGA328P processor).
You need an ICSP programmer for ATMEGA328P (see fuses doc).
DB4020ea3gcyV1.hex
Text Document 82.7 KB
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DB4020 Firmware V 2.2 November 20, 2020
Updated DB4020 V2.2 firmware. Last version.
- DB4020 can operate on USB in the 40m band to FT8 etc.
- Display shows USB, LSB or CW mode of operation.
- Increases CLK1 level in TX 20m
You need an ICSP programmer for ATMEGA328P (see fuses doc).
DB4020ea3gcyV2.2.hex
Text Document 83.3 KB
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ATMEGA328P ISP programming fuses doc.
ATMEGA328 fuses.pdf
Adobe Acrobat Document 264.1 KB

ATMEGA328P V2.2 programmed module for DB4020 transceiver (PCB, parts and chip)

Available only to DB4020 owners 

DB4020 owners price: 9€

9,00 €

  • 0,05 kg
  • Available
  • Ships within 3-5 days

ATMEGA328P microcontroller chip V2.2 programmed for DB4020 40&20m transceiver

Available only to DB4020 owners 

DB4020 owners price: 4,50€

5,50 €

  • 0,05 kg
  • Available
  • Ships within 3-5 days

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EGV+ Firmware V 1.0
This is the first firmware version for EGV+ 40-30-20m CW transceiver (ATMEGA328P processor).
You need an ICSP programmer for ATMEGA328P (see fuses doc above).
EGV_V1.hex
Text Document 83.0 KB

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Arduino basic open source sketch for ARDU-5351 VFO
It is a basic open source sketch from which you can develop your own program for the ARDU-5351 VFO. You must have sufficient knowledge. Technical advice is not offered for this.
ARDU-5351OS Arduino Sketch english.zip
Compressed Archive in ZIP Format 8.4 MB
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Arduino sketch básico de código abierto para ARDU-5351 VFO
Es un sketch básico a partir del cual usted puede desarrollar su propio programa para el ARDU-5351 VFO. Usted debe tener conocimientos suficientes. No se ofrece asesoría técnica para este.
ARDU-5353OS Arduino Sketch spanish.zip
Compressed Archive in ZIP Format 8.4 MB