Hi guys,

I needed a morse key adaptor for my computer - so I used common parts, but lacked a proper case. I decided to go for:

• FT232RL (USB-C)
• 3,5mm Jack Plug
• Non-additional-screws design (it uses the nut of the Jack Plug)
• Small frame for a label (on top)

STEPS

• Print both parts and clean (from support)
• Solder the wires between board and jack plug (make sure you don't have leftovers at the bottom of the circuit board)
• Push the board in to the bottom part (it should click, use a bit pressure at the black plastics of the backside connectors)
• Lay in the Jack Plug properly (GND contact upwards, the other contacts will help that it doesn't when screwing on
• Slide on the upper part (it should secure the board additionally)
• Check that the Jack Plug is still in good position
• Screw on the Jack Plug nut (you might need to use a small screwdriver for that - the nut has two little scores)
• Test :-)

Wiring

I hope I got it right - I just have a straight morse key, not a paddle. I used the wiring description of an ICOM transceiver. So connect...

• DSR to (2) at Jack Plug
• DTR to (1) at Jack Plug
• CTS to (3) at Jack Plug
  That results in the first pin as (dit), the middle part as (dah), and the large part as ground.

PARTS

The FT232RL is with USB-C Connector. These are quite rare in our region, so please check beforhand what you have / is available to you. I purchased mine via ebay.

Jack Plug: I got mine via ebay. Diameter is 8mm, total length about 14.5mm - just for comparing that you chose the right one.

Label

Well, this was more a trial. I own a standard label writer and printed a small label (25mm x 12mm) I put on top. I add the label as PNG - but most likely you want to create your own. I needed to use strange margins to print it via Linux.

Now, have fun!