Open Interface III
is open hardware for any Arduino code for running your own hack - also standart interface between transceiver and computer with keyer for Arduino based on K3NG code and many others.
Main functions:
- Completly Open source
- Hardware and software is open cc by-sa
- You can modify or build own software functionality
- Arduino compatible chip (ATMEGA2560)
- Operation system independent (Linux, OSX, Windows)
- CW - complete K3NG code
- CLI interface (telnet) or Winkey emulation
- Memory button
- Speed rotary encoder
- Keying from PC com port (DTR/RTS)
- SSB
- Switch TX audio between Microphone (Foot switch PTT) and USB Audio (com PTT)
- Playing audio memory from PC
- FSK (RTTY)
- from three source
- Serial com port (DTR/RTS) - EXTFSK
- Serial com port ASCII (telnet)
- Three button memories
- Sidetone
- Decoding TX signal during transmit from EXTFSK
- DIGI Modes
- Adjust TX volume buttons
- Adjust RX volume potentiometer
- Isolated audio path with two transformers
- CAT
- Support TTL (Icom) and 232 level (Kenwood, Yaesu)
- Own serial to USB interface with internal USB HUB
- Band decoder
- Support Icom, Kenwood, Yaesu CAT
- Sniffing TRX to PC communications or automatically own request
- Outputs
- TTL level BCD
- CAT on ACC connector - CI-V, Kenwood/Yaesu (need TTL/232 converter)
- IP output (in future)
- OTHER
- INTERLOCK - switches OFF all PTT signals, defined by Sequencer delay
- Galvanically isolated USB to PC - four independent ground
- PC
- Transceiver
- RX audio
- TX audio
- micro SD card slot for future use (save config)
- Ethernet module
- two type PA PTT output
- Relay - isolated but 5ms latency
- Open collector - quick
- ACC connector (HDMI type) with
- Serial line
- I2C
- PWM
- Analog inputs
- Digital in/out
 Block diagram III |
 Circuit III |
 Block diagram rev 2.6 |
 Circuit rev 2.6 |
Short menu intro
Download
| Revision 3 | ||||||
|---|---|---|---|---|---|---|
| v3.141 | sch  |
brd1  2 240 |
 pcb [20MB] |
kicad82 | dxf.zip114 | block |
| v3.14 | sch  |
brd  |
pcb [17MB] |
kicad58 | dxf.zip462 | block  |
| v3.1 | sch  |
brd  |
pcb [17MB] |
kicad383 | dxf.zip361 | pic1  2  3  |
| v3.0 | sch  |
brd  |
pcb [16MB] |
kicad318 | dxf.zip268 | pic  panel  |
| Arduino firmware | ||||||
| experimental code | GitHub.com | Last update: April 29 2017 | ||||
| 3D print component | ||||||
| LCD mount | l.stl576 | r.stl492 | .scad457 | 3D preview |
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| Pot mount | .stl388 | .scad434 | 3D preview |
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| Revision 2 | ||||||
| v2.6 | sch |
brd  |
kicad1026 | |||
| Arduino firmware | ||||||
| by K3NG | source | doc | pins.h1221 | |||
| Case | ||||||
| v2.6 | full.DXF820 | DXF4cutter768 | wiki | |||
| Design | front-panel.svg  |
sticker.svg  |
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| USB isolator | view  |
.scad906 | .stl911 | 3D preview |
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 Open-Hardware
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We believe open source is a better way of doing things. View and download the Shield Schematic and PCB Kicad/Eagle CAD files, LibreCAD .DXF, or Inkscape .SVG files. The hardware designs are released under the Creative Commons Attribution-ShareAlike 4.0 International License |
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