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Davac 4.2 is updated version of [[Davac4.1|Davac 4.1]]. It is opto-isolated interface between PC and radio. Supports CW and SSB CQ, band recording. Radio modulation comes from microphone or soundcard.
Davac 4.2 is updated version of [[Davac4.1|Davac 4.1]]. It is opto-isolated interface between PC and radio. Supports CW and SSB CQ, band recording. Radio modulation comes from microphone or soundcard.
Please also look at [[Davac5]].


[[Image:Davac4.2-3d.png|none|frame|Davac 4.2 PCB model]] [[Image:Davac4.2-box.png|none|frame|Davac 4.2 box model]]
[[Image:Davac4.2-3d.png|none|frame|Davac 4.2 PCB model]] [[Image:Davac4.2-box.png|none|frame|Davac 4.2 box model]]


==News==
==Features==
* Simple assembly
* Simple assembly
* Most possible parts are SMD, except too expensive or unobtainable ones
* Most possible parts are SMD, except too expensive or unobtainable ones
Line 11: Line 13:
* 3.5 jacks
* 3.5 jacks
* 3D printed box
* 3D printed box
* SMD LEDs + light guides on front panel
* power supply from USB
* pin header for band switching
* nice logo on PCB and box :-)
* radio-specific cables for different radios


==Circuit diagram==
==Circuit diagram==
Line 16: Line 23:


==PCB==
==PCB==
<gallery mode="packed" heights="320px">
{{Download|Davac42-jlcpcb.zip}} Gerber files to order PCB at [http://www.jlcpcb.com jlcpcb.com].
Image:Davac4.1top.png|PCB top/THT side
 
Image:Davac4.1bottom.png|PCB bottom/SMD side
==Box==
</gallery>
{{Download|davac42-box.zip}} STL files for 3D printer.


{{Download|Davac4.2-jlcpcb.zip}} Gerber files to order PCB at [http://www.jlcpcb.com jlcpcb.com].
Recommendations:
* Nozzle 0.4mm
* No support, no brim
* Layer height - first 0.3mm, others 0.2mm
* PETG
* Slow first layer for top side (8mm/s)


TODO
Print takes about 5-6 hours.


Light guides are made from transparent PETG filament.


==Parts==
==Parts==
[https://www.tme.eu/gb/katalog/#search=tr-1/1 Transformer TR-1/1 www.tme.eu]
{{Download|Davac42-bom.csv}} Bill of material for [http://tme.eu tme.eu].


[https://www.gme.cz/konektor-jack-k3606d Jack 6.35 K3606D www.gme.cz] or [https://www.gme.cz/konektor-jack-k36092b K36092B]
(not including cables)


[https://www.gme.cz/konektor-se-zamkem-psh02-03pg White connectors] [https://www.gme.cz/konektor-se-zamkem-pfh02-03p for cable] [https://www.gme.cz/kontakt-pff02-01fg pins]
==Cable to radio==


[https://www.gme.cz/konektor-mlw10gt Black connectors] [https://www.gme.cz/konektor-pfl10 for cable] [https://www.gme.cz/awg28-10h flat cable]
* [[Davac IC-7400 cable]]


==Program the FT232R==
==Program the FT232R==

Latest revision as of 11:38, 28 December 2023

Davac 4.2 OK1ZIA

Davac 4.2 is updated version of Davac 4.1. It is opto-isolated interface between PC and radio. Supports CW and SSB CQ, band recording. Radio modulation comes from microphone or soundcard.

Please also look at Davac5.

Davac 4.2 PCB model
Davac 4.2 box model

Features

  • Simple assembly
  • Most possible parts are SMD, except too expensive or unobtainable ones
  • Designed for SMD reflow
  • 3.5 jacks
  • 3D printed box
  • SMD LEDs + light guides on front panel
  • power supply from USB
  • pin header for band switching
  • nice logo on PCB and box :-)
  • radio-specific cables for different radios

Circuit diagram

Circuit diagram of Davac 4.2

PCB

Davac42-jlcpcb.zip Gerber files to order PCB at jlcpcb.com.

Box

davac42-box.zip STL files for 3D printer.

Recommendations:

  • Nozzle 0.4mm
  • No support, no brim
  • Layer height - first 0.3mm, others 0.2mm
  • PETG
  • Slow first layer for top side (8mm/s)

Print takes about 5-6 hours.

Light guides are made from transparent PETG filament.

Parts

Davac42-bom.csv Bill of material for tme.eu.

(not including cables)

Cable to radio

Program the FT232R

As default, the FT232R acts as serial port. But Tucnak uses Libftdi to access it in bitbang mode. Default VID:PID must be changed to distinguish Davac from other USB serial ports.

Linux

Use original ft232r_prog or modified ft_prog, contains statically linked x86_64 binary.

Usage:

# ft232r_prog --new-vid 0xa600 --new-pid 0xe110 --manufacturer OK1ZIA --product 'Davac 4.2'
...
Rewriting eeprom with new contents.

Now replug the device

# lsusb
...
Bus 002 Device 007: ID a600:e110 Asix OK1ZIA Davac 4.x
#

(texts are not same, they origins from lsusb database)

In the case of mistake, use --old-vid and --old-pid. AFAIK this can be used also to fix fake FT232 bricked by Windows FTDI drivers.

Windows

MProg with loaded Davac4.ept

Under Windows, use MProg. Download File:Davac4.ept and open it in MProg. Note on Windows XP you need D2XX drivers; on newer versions they are installed automatically.

Unplug all other FTDI devices and press the Program All Existing Devices button.

Install USB drivers

Linux

You have nothing to do, It will work automatically. Only on specific distributions you may have to set permissions to USB device, which is normally done by udev script.

Windows

Zadig with Davac4

Under Windows 7 or newer, use Zadig. On XP use 2.2.

Click Options, List All Devices.

Choose WinUSB and press Install Driver.