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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.
- 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).
See the STK500 programmer at the end of the page.
DB4020ea3gcyV2.2.hex
Text Document 83.3 KB
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EGV+ Firmware V 1.1 Mai 1, 2021
Updated firmware V 1.1 version for EGV+ 40-30-20m CW transceiver (ATMEGA328P processor).
- Modified offset to 700Hz.
- Modified oscillator levels.
You need an ICSP programmer for ATMEGA328P (see fuses doc).
See the STK500 programmer below.
EGV_V1.1.hex
Text Document 83.0 KB
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ATMEGA328P ISP programming fuses doc.
ATMEGA328 fuses.pdf
Adobe Acrobat Document 264.1 KB

ATMEGA328P microcontroller chip programmed for DB4020 V2.2 transceiver or EGV+ V1.1 transceiver

Available only to DB4020 or EGV+ owners 

See the STK500 programmer at the end of the page.

DB4020 V2.2 price: 6,00€

EGV+V1.1 price: 6,00€

6,00 €

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

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KB2 keyer firmware. (DB4020 CW Interface or EGV+ transceivers)
KB2 firmware for PIC12F1840.
kb2_keyer.hex
Text Document 19.0 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


STK500 ATMEGA programmer.

It is our favorite recommended programmer.

The best programmer for AVR. You will be able to schedule all updates for your ATMEGA328P and Arduino NANO forever (DB4020, EGV + ARDU-5351 kits).

It is the programming tool recommended by the AVR ATMEL / Micropchip (c) manufacturer, AVR ISP (In System Programming).

It works with the free official Atmel Studio platform (we recommend Atmel Studio 7) link

25,00 €

22,00 €

  • 0,1 kg
  • Available
  • Ships within 3-5 days