Mike O’Connor

Scala is weird.

Time series chart of the freezer ambient temp as well as the water temperature. The water remained at the same temp from 9:30 until about 1:15, and has finally started getting colder again.

I love it when a plan comes together

Shade tree engineering is the grease that keeps the world spinning. I enjoy living vicariously through your exploits.

Nothing the old grinder and paint can’t fix

I bet the heat from those welds will help too. Tape up the chrome rod real good, though.

He's got all kinds of clever tricks for dismantling hydraulic cylinders. Huge industrial ones.

Cutting Edge Engineering Australia Welcome to our machining, welding & hydraulic repair workshop! RIGHTO GUYS! Kurtis & Karen here from Cutting Edge Engineering, we're a down-to-earth real life machining and fabrication workshop in ...

For no reason in particular, I feel like you would appreciate the content coming out of this guy's machine shop: www.youtube.com/@CuttingEdge...

In my case, I'm using an ESP32 from @adafruit.com, combined with some NTC thermistor-based probes that I scavenged from an oven thermometer kit. So I'm fitting an exponential curve to the observations to characterize the behavior across the temperature range.

YouTube video by Vendetta Prospecting Flashed Before my Eyes!! My First Gold Button | #shorts #24kgoldn #gold

The same is true for other materials, too. When you melt gold, it will 'blink' as it solidifies and its temperature jumps up again: www.youtube.com/shorts/uiEi2...

So, basically, water can exist at 0°C without freezing. And that's because there's heat energy still trapped inside it preventing it from crystalizing. The crystallization process itself is exothermic. If you were to snap your fingers and turn the water into a solid, you'd see a temperature spike.

Screenshot of the temperature history of 2 thermometers. One in yellow is taken from an ambient air temperature sensor inside my freezer. It reads about -10 degrees, and the cyclical pattern of the compressor is visible in the trace of the temperature line. The other, in blue, is the temperature I'm measuring with a probe in an ice cube tray. The temperature dropped steadily until it hit the freezing point of water. It has since plateaued at that temperature while the latent heat of the liquid water is abosorbed by the freezer. Eventually, when it crystalizes, the temperature will continue to drop. but until then, this horizontal line serves as an excellent reference point for 0°C.

Today I used the latent heat of water to precisely calibrate some thermometers I'm using to measure the temperature of the smoker in my garden. Water freezes at 0°C, but before it does, it sits at 0 for a while before crystalizing and continuing to cool off.

I did the same with the seats in mine! It was the designated cargo vessel for my sailing team for a few years, too. We would drive to regattas and fill it with gear. You can fit a lot of junk behind the front seats of a Previa.

The AWD system was one of those viscous coupling setups like the they put in Subarus. In a gravel parking lot, if you turned the wheel hard to one side and dumped the clutch, you could get it to spin in place around it's center of mass.

My first car was my mom's hand-me-down Previa. It was powder blue, had all wheel drive with a manual transmission, and by the end of its life it had flames and a racing stripe painted on it. I loved it so much. One day, we'll be reunited.

This is good to know. I'm using ESPHome for this project, so I donno if this is exposed as an option. But it's something I can fiddle around with at some point. For now, I sidestepped the problem with different pins.

Maybe there's a way to do it. Maybe they're not internal and I just overlooked something. But I sidestepped the problem by using different pins, and freed up the i2c bus for more sensors. Win:Win

A classic case of RTFM

I switched to a different pair of pins and the problem went away immediately. Which is great, because I also plan on using some i2c hardware that makes use of SDA and SCL.

Internal pullups. Was getting wacky readings from a voltage divider circuit and I couldn't figure out why.

Today I learned that the SDA and SCL pins on my Adafruit feather ESP32 are pulled high, making them bad choices for use with the corresponding ADC on those pins. Save yourself the hours of hardware and software debugging - don't do what I do.

Toasted halloumi is among humanities greatest achievements.

450 grams of blackberries in a bowl on my kitchen scale.

Blackberries cooking in a pot on my stove, to become jam.

The finished jam in a jar in my hand

Jam on sourdough toast with butter underneath. Delicious

First batch of blackberries came off the vines this weekend. So I made jam:

Screenshot of my LinkedIn header, with my new title as Machine Learning Engineer

It's official, I've joined the dark side. Can't wait to inundate you all with my AI and Machine Learning hot-takes.

One thing I love about engaging with music content on YouTube is the strategically placed adverts right at the spot where the drop is meant to happen.

It's been 6 months since I saw Snarky Puppy recording the new album and I'm getting unreasonably excited about the release this fall. Can't come soon enough.

You should come see it for real

Rush is pretty good, y’all.

Death Stranding 2 is on another level of weird

More #plotterart on the home-built #penplotter

It's ironic that many of the country's staunches social darwinists are people who, when asked, would enthusiastically reject the Origin of Species as heresy.