Android Headphone Buttons

I wanted a skip backwards button for audiobooks in the car so I used the android headphone button standard.

Physical Power and Relay Buttons for Octoprint

I run octoprint on a pi. I have octoprint controlling a relay for the printer, and I wanted a physical button on the printer to make octoprint toggle it.

Turns out a pi can also have a functional power button to turn it on and off these days too.

Notes on RTKLIB and uBlox C94-M8P

Notes on how far I got trying to use RTKLIB and the uBlox C94-M8P.

I got a realtime RTKNAVI solution that switched between fixed and floating.

Android Bind Mounts

I require symlinks in the user portion of my android storage. Turns out it's a lot more complex than that.

Pulseaudio Output to Arbitrary List of Sinks

I have a headset that has two output devices, a stereo and a mono, with a fade pot to go between them. This means I want voice programs to go to mono, and everything else to go to stereo.

I also have some speakers, and I would like to output to them at the same time.

Joysticks in Linux with joydev and evdev

Linux has two joystick modules, joydev and evdev.

Most joystick calibration tooling is for joydev, but that's deprecated. There aren't any default tools for saving evdev calibrations.

This is my notes on how I got my joystick calibrated.

zw3005 honeywell z-wave lightswitch teardown

Some friends use the TP link kasa lightswitches. I intended to buy one to evaluate, but got confused by someone else talking about what they use(z-wave) while I tried to order it.

I don't use zwave, so I decided to see what would be involved with converting it to be ESP based.

TL;DR: Maybe possible to convert, but way too much effort.

KiCad Art

Putting logos on a kicad board isn't terribly hard, just slightly annoying.

some boards with art

i3Detroit Automation: Snappy Title Pending

Here at i3Detroit, we like learning things. Also we don't like doing extra work. This usually balloons into a lot of extra work and (hopefully) less work later.

i3Detroit Automation System Architecture

We started looking into automation for a few reasons: simplifying the space shutdown procedure, and cost/complication of expanding. Most of our existing lighting circuits are where they were when we started renting the building but some of them have been cumbersome to work with ("no, you can't plug that in there that outlet turns off when the lights do"). When we expand to encompass even more space it gets increasingly difficult to run more and more light switches to control groups of outlets. With networked relays on every light we can specify groupings in software rather than spending 4-5 hours bending conduit, planning a route in our increasingly crowded ceiling and walls, and pulling fairly expensive wire long distances. Doing this in our current space gives proof that we do not need to spend a lot of time re-wiring any building we inhabit, just plug in the lights to whatever outlets are already up there and we can control them in whatever pattern is most convenient.

Frequently people would complain because they come in and find the doors to have been unlocked all night, or the tank of argon has all leaked away, or maybe someone decided to try to heat our colander of a shop to 75F all night long in the middle of winter when no one was there. The benefits of automating things is not just saving time on tasks that get done, but making sure all the tasks actually do get done.

Programming the AT90USBKEY2

In my continuing quest to turn a thinkpad keyboard into a USB keyboard, I decided to try the at90 line of avr chips. Bought a AT90USBKEY2 dev kit, and tried to put TMK on it.

This was another "one" day project. It ended in running the onekey example, so this post is more just "how to use the AT90USBKEY2.

← Newer Page 1 of 2