I regret to announce that we are now a two hurdy gurdy household

This was a lovely Kaiser-Fraiser that passed me yesterday. #unusualcarsmastodon

First try at brazing using the gas torch and flux rather than the tig.
It's so slow. Like 1/10 the speed of tig brazing. I have better control of where the brazing fillet goes with gas.
People online are all painting flux on the joint but this says heat the rod and dip it in the flux and that seemed to work. I'll try dissolving some of this in alcohol and putting it on the joint the way I do with silver solder, next.

And I have a little lightbulb go on over my head. Wait, what if the output of the power supply I'm using to drive the pin isn't really linear? The two other engineers working with me both make O faces, and I stick a multimeter on the pin, and yeah, we're all chasing a DAC error on the supply, not an offset on our chip. Sigh. (2/2)

I'm trying to characterize a new IC that can act as a voltage controlled current amplifier: it supplies a constant current as a function of the voltage applied to one pin. We want to know how linear its response is, if there's an offset, blahblah. And there's a periodic linearity error. I change the input voltage step size, and the periodicity changes. People stare over my shoulder. Tooth hisses. What did we do wrong in this design? (1/2)

There's a whole flock (tribe? Murder? Convocation?) of cattle egrets up the street. Usually these are solitary and in shallow water, but there are ~20 of them in a baseball field near my house. These are almost waist high when they stretch their necks all the way up.

And it works pretty well! Now I have to swap out the other two because one is bending.

Maybe someone supplies double set screw slotted repair collars for a 50 year old machine. But I have a lathe and a mill.

Many of the front panel knobs go back to a panel in the back that handles the CRT hardware, and they chose to do this by using long aluminum rods that use shaft collars that attach to the potentiometers using a flex coupling. The shaft collars have two set screws and are slotted for driving the plastic flex coupling. The slot is flat bottomed with sharp corners at the base of the slot, which is a good way to make something that cracks.

We have this 50 year old curve tracer which could easily kill you by accident, so nobody used it, and finally someone asked me to make it safer. I did, and now everyone uses it, and last month it broke from overuse and I just got around to fixing it.

Well I have the screen loose. Now I get to start working on the frame bends and getting all the glass out of the insides.

I probably use too much support structure but this thing is all curves and no way it would stick to the bed.

I'm posting this for a friend and in case I forget. If you wreck your android phone, when you get a new one, Google wants you to use 2FA to set up your acct on the new one, and the 2FA options require access your old phone.
Go to your google account on desktop (log in, click on user icon, go to Manage Your Google Account, go to the Devices tab) you can log out of your dead phone. Then Google offers to send you confirmation information to your new phone number.
#AndroidRecovery

Slightly modified swan splint, for supporting finger joints against hyperextension, for arthritis and EDS. I printed this in PLA with 50% infill, and suspect it'll break in use and I'll have to fabricate this from nylon, but it's a good test and seems to work for the pianist who commissioned it.

Polaroid Club with @rhiannonstone

I completely obliterated my phone in a bike wreck today (I'm uninjured, but the phone hit the pavement at about 80 km/h and slid and bounced a very long ways) and wowie is it difficult to set up an account on an android phone these days, when your phone is permanently unavailable.

Some eagle

The bench hardware: three amps (one is mistakenly grounded so it's not recording) and a prototype shield that splits SPI and power and also handles the parallel connection to the LCD. The gps module is visible off to the right. Yes the speed readout is in knots.

I built a three channel thermocouple amplifier interface with a datalogger, display, and GPS module. The Adafruit GPS module and code are amazing, but they're also like 13KB and that sucks up a LOT of an atmega328's memory. So either I get timestamps and speed, or I get datalogging and a display. Or I move to a Mega but then I have to rewire all the SPI (or I finally use that adafruit feather.) Anyway, it all works so now I can measure temperature drop across the radiator while driving.

Tail end of a two meter long bullsnake we met on the lunchtime bike ride yesterday. It was across the road until I encouraged it to go somewhere that it wouldn't get crushed by cars.
Oddly mellow for a bullsnake, too. Usually they coil and hiss and fake strike when I'm trying to get them to move. This one was all oh ok I'll just leave then.