I have 5+ years of experience prototyping electronic devices from EDA schematic capture/PCB layouts (mainly in KiCad), to firmware development in the Arduino IDE and Circuitpython, to configuring and scripting Linux single-board computers for fully computerized discrete devices.

A USB MIDI controller for event lighting with paginated channel sets, fully illuminated controls, and with latching, momentary, slider/knob, and 8-position XOR/ganged latching inputs.

A device I made to better track my hours at work, and to experiment with RFID chips/readers. It uses an NFC keycard (can support multiple unique user IDs), a precision RTC module, an SD card, and an ESP32 to log my time in/out on a JSON file that I can access securely through a local wifi connection at the end of the pay period to submit my hours.

I wanted a vibey, loud, and visible alarm clock that could store and print reminders at any future date/time, and I wanted to get and use some Nixie tubes before the new-old stock dries up. This does that, has an optional clap-to-wake sleep mode, and can also be used as a virtual dice roller.

It's a clock, a worklight, a bluetooth or 3.5mm stereo speaker, and a weather station (it could be configured to fetch/display data from any number of public APIs). The idea as with many of these isn't streamlined functionalism but a fun combination of vibes and marginal utility.

A kind of conceptually open practice project that grew as it went. I ended up deciding to use a 6" color CRT display, a Raspberry Pi, and a preposterous number of sensors to make a scanner unit with simultaneous display. Includes a LWIR (thermal) camera, a LiDar distance sensor, two light meters, a UV meter, a thermometer, a barometer, a hygrometer, a Geiger counter, and a microelectromechanical (aka MEMS) gas sensor.

I am well aware that I could have a more capable version of this in my pocket using Meshtastic, but as with the last device, the clunky analog nature was part of the idea. This is a linked set of encrypted wireless (LoRA 915MHz) text terminals. Not a walkie-talkie, but a sitty-typey.

A limited but very effective technique in which assets are rendered for when the position of a spectator, a projector, and a surface can be precisely planned for (say, a scene that can only be watched from a specific window) in order to create the optical illusion of fully 3D objects in space.