Davac4
Davac 4.1 OK1ZIA
Davac 4.1 is updated version of Davac 4.0 designed in 2008.
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I'm working on Davac 4.2 - simpyfied, SMT for easy assembly, 3D printed box. Please consider to wait until construction verify (May/June 2022). |
News
- IRLML2246 instead of IRF7220
- Silscreen cleanup
- Values on silkscreen
- Jack holes are 2 mm
- Guard ring connected to GND
- Manufacturing data for jlcpcb.com included
Errata
- Optocouplers are TLP627, not PC817 (error during convert Eagle -> KiCad)
- Headphones have GND connected to hot and vice versa. I recommend skip REL2 and connect radio to headphones directly
Circuit diagram
PCB
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PCB top/THT side -
PCB bottom/SMD side
Gerber files to order PCB at jlcpcb.com.
If you have extra pcs and want to help other Tucnak users, let me know, I will announce here.
Parts
Jack 6.35 K3606D www.gme.cz or K36092B
White connectors for cable pins
Black connectors for cable flat cable
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 ft232r_prog.
Usage:
# ft232r_prog --new-vid 0xa600 --new-pid 0xe110 --manufacturer OK1ZIA --product 'Davac 4.0' ... Rewriting eeprom with new contents.
Now replug the device
# lsusb ... Bus 002 Device 007: ID a600:e110 Asix OK1ZIA Davac 4.x #
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
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
Under Windows 7 or newer, use Zadig. On XP use 2.2.
Click Options, List All Devices.
Choose WinUSB and press Install Driver.