DK4HAA - HarmOct 4, 2025

Today I continued a project for the upcoming #39C3

I'm preparing a vending machine where you can get a kit for a morse code transmitter-thingy.

The kit is divided into three boxes:
1. ESP32
2. piezo speaker, TRS breakout board, jumper wires
3. 2x16 LCD

I tried to build paper boxes but failed. @dc1tc suggested 3D-printed ones. I tried and they work perfectly!

The vending machine is 43 years old and operates completely mechanically. It still works like a charm.

#amateurradio

Show threadDK4HAA - Harm

I'm working on designing the front of the vending machine. I opted for a comic style design explaining the kit and how to operate the machine itself. Not finished yet. But... I love it already!

I'll add a folding aluminum frame to the front, so I can swap the sign easily for other events or kits. Size is A3.

#39C3 #morsecode #hamr #amateurradio #diy #kitbuilding

Oct 5 at 6:45pmWeb
Show threadDK4HAA - HarmOct 12

Update: Today I mounted a folding frame that holds the instructions to the front of the vending machine. I corrected the offset of the coin slot cutout in the drawing to the final position. Now only the upper part of the poster is missing.

I think I never had a project for the #congress ready in mid October. 🤔

#39C3 #ccc #chaoscommunicationcongress #hamr #morsecode #diy #kitbuilding

Show threadDK4HAA - HarmOct 12
Aaaaand it's done (for now). 😍 I love it!
Show threadKai Pastor, DG0YTOct 12

@DK4HAA Amazing.

And the K in CMYK is for "Key"...

Show threadDK4HAA - HarmOct 12
@DG0YT Oh, wow, why didn't that pop into my mind earlier. That's brilliant! I guess, I need to find some kind of black (morse) key. I try to get the PCB version ready, despite the fact I don't need another project this year. Will order black PCBs then!
Show threadMikel Forcada EA5IYL / N7EESOct 13
@DK4HAA This is awesome! But... my browser does not like the website https://esp32morse.dk4haa.de/ as it does not recognize the SSL certificate.
Show threadDK4HAA - HarmOct 13
@Ea5iyl it forwards to https://github.com/kitesurfer1404/esp32morse
I'll check the settings later. Thanks for letting me know. 👍🏻
Show threadMikel Forcada EA5IYL / N7EESOct 13
@DK4HAA You're most welcome! Will tale a look!
Show threadMikel Forcada EA5IYL / N7EESOct 13
@DK4HAA Do you ship those kits? I teach CW and they would be a great toy to build and practice. I see the code is quite self-documented... but I think a quick description of the hardware would be welcome. Thanks!
Show threadDK4HAA - HarmOct 13
@Ea5iyl Hardware documentation will follow. Goal is to have everything ready end of December.
Not planning to ship the kits. But once the hardware is listed, you can easily buy parts for your course. Depending on the number of kits, parts are around 10 € per kit. Soldering is only required for three pin headers. Then everything is connected with jumper cables.
Bot I hope someone designs a nice 3D printed case. And someone will hack a nice(er) firmware with more features.
Show threadDK4HAA - HarmOct 13
@Ea5iyl It's for a hacker congress, so I bet, something will be develop there.
Also, the controller is Morserino compatible. Maybe someone ports the Morserino firmware to this hardware. There will be some limitations tho. But the main functions will work.
Show threadMikel Forcada EA5IYL / N7EESOct 13
@DK4HAA Thanks a lot! Will keep an eye on it. Having a bill of materials would probably render the design quite transparent.
Show threadDK4HAA - HarmNov 16

@Ea5iyl First commit of the documentation is online. https://github.com/kitesurfer1404/esp32morse

Schematic still needed.

GitHub - kitesurfer1404/esp32morse

Contribute to kitesurfer1404/esp32morse development by creating an account on GitHub.

GitHub
Show threadM0KHROct 13
@DK4HAA That is brilliant!
Show threadPeter DL6PLOct 13
@DK4HAA I am hyped for the congress already! 😍
Show threadkresseOct 5

@DK4HAA okay, will need to give someone some spare change to get that.

Really good idea 🤩 #hamradio