Last update: 21. 04. 2022 18:38 (git revision 06a8054 )

OtterCAT

An HamRadio USB CAT interface.

Features

KiCAD Requirements

KiCAD 6.x minimum.

Needed libraries checked out in the parent folder where the OtterCAT is: - https://dev.otter.sh/dashie/KiCad_libraries - https://github.com/Jana-Marie/KiCAD-libs

Photo

v1.1

Pinouts

Any pin denoted "GND" are all the common GND of the interface, pins denoted "-" are isolated grounds, either after an Optocoupler, or 1:1 Transformer.

Internal jumpers: - JP1: To enable EEPROM, only if components are provisioned - JP2: Choice between RTS or DTR for PTT1 trigger - JP3: Choice between RTS or DTR for PTT2 trigger

EEprom

The USB Hub can has an EEPROM provisioned, it will allows to only show two usb ports downstream, or change VID/PID etc.

By default no EEPROM is provisioned.

Test points

USB Side: - TP1: GND USB - TP2: 5V USB

Isolated side: (Don't test an isolated TP with an USB side GND) - TP3: 5V - TP4: GND

Assembly

Requirements for assembly file generation:

Generate Fabrication Files with:

kikit fab jlcpcb --no-drc --field LCSC --schematic OtterCAT.kicad_sch --assembly OtterCAT.kicad_pcb fab

You can then upload fab/gerbers.zip to the fab house of your choice.

Project has been made and tested with JLCPCB PCB service, with default choices, nothing special.

Generating an Interactive BOM from older release or current:

# if you are on a specific release you would have done:
# git checkout 1.1
# then:
kibot -b OtterCAT.kicad_pcb -c kibot.ibom.yaml --out-dir=ibom
# then open ibom/index.html in your browser

Changelog

1.0 - Initial rev

1.1

1.2

Projects worth mentioning

License & contact

Available files

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