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Experiments

"A test under controlled conditions, demonstrate a known truth, examine a hypothesis, or determine the efficacy of something previously untried."

When I experiment and test stuff it might end up here, things like failed projects or tests for a project than never will become reality.

Gets started with Meshcore

  • Post date 2026-05-15
  • Categories Experiments
Mesh radio After my last round of testing on the window sill, I realized we need to talk about how these radios actually talk to each other. Mesh radio is basically just small devices passing notes across town, bouncing the signal until it reaches the right person. The two main firmwares we use right now are Meshtastic and Meshcore, and they handle [...]

LED-Scroller with Unicode support

  • Post date 2025-12-18
  • Categories Experiments
I have previously posted texts regarding my adventures in RGB-panel land, first here, and then here. To make the office a bit extra Christmassy this year i decided that I wanted to display some scrolling text (no problem at all) with emoji (great problems). The fonts supported by drivers for these panels have letters, and just the boring ones, not [...]

Boxy light sign

  • Post date 2025-02-09
  • Categories Experiments
For one of my children I created a small sign that said Roblox and I really liked the aesthetics of it so I created a larger version with built in light. From the start I maximized the size of the letters according to the printable volume on my 3d-printer. But the printing took ages, and it was close to 400g material per letter so I scaled it down [...]

Dropped ceiling attachments

  • Post date 2024-10-18
  • Categories Experiments
In our office we have a suspended ceiling that we wanted to attach stuff to. Firstly we wanted a curtain rod to partition off a bit of the open plan. And later two small lights for a disco ball! First version, intended for curtain rod The first version worked quite well for the curtain rod, a couple of the small hooks got broken off but I made plenty [...]

Simple WiFi monitor with ESP32

  • Post date 2024-03-24
  • Categories Experiments
To be able to measure the Wifi quality over time I created a small program for ESP32, probably works for ESP8266 also, that every five minutes reports the ping RTT to the local gateway and the RSSI to the connected AP. The idea is to get a handful cheap ESP32 boards and litter them around the house and send the data to influx-db to be able to create [...]

Vindriktning online

  • Post date 2023-09-21
  • Categories Experiments
Quite a while ago I bought an IKEA Vindriktning air quality thingie on sale with the intention to connect it to my Home Assistant setup. It’s a quite simple affair, there is a RS232 TX pin on the Vindriktning board that spews out values, so just connect a ESP32 to that and push the values to MQTT. There's quite a lot of guides online that are [...]

Oxidize copper

  • Post date 2022-11-06
  • Categories Experiments
For a project I'm working on I wanted to test to oxidize copper to get it to look old and used so I read up on the internet and got some ideas. So I got hold of the chemicals I wanted to test with. Ammonia Table salt (fine, flake and coarse) Hydrochloric Acid Citric Acid Some texts indicated that you could apply Ammonia get the oxidizing to start of [...]

Keyboard case placeholder

  • Post date 2022-03-26
  • Categories Experiments
After I received my new PCBs I wanted to get a feel for them and start using them as fast as possible. So I grabbed a 22mm thick sheet of MDF from the stack and started cutting in to it. For the tray to have a bit more strength I soaked it was watered down wood glue a couple of times before I painted it black. The result wasn't amazing, or above [...]
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Lou1:d – Almost my second keyboard

  • Post date 2021-04-10
  • Categories Experiments
After trying hand-wiring i decided that I wanted to try to make a custom PCB. This would be the first that was a bit more advanced, with a MCU and USB. I also wanted a PCB for the vintage SMK switches I just bought from Ebay. SMK gen2 switches I used EasyEDA to design it since i would be ordering from JLCPCB and there is a nice integration between [...]

CNC engraving

  • Post date 2020-05-24
  • Categories Experiments
During the first months of the Pandemic I bought a small tabletop CNC machine from Switzerland (read: China). It has a working area of 60x40cm and work very well for wood and other softer materials. I've added some things to it, a vacuum-shoe for example. I've used it to make several prototypes of keyboard cases in wood. I've used oak, birch, pinewood, [...]

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