I'm sure plenty of you have some random projects on the go... would be interested to see any if you're up for it. Anything, really. I appreciate all forms of tinkering.
I've had a few fun ones this past couple of years. Mostly kind of weird, but this one's normal: a custom heater for my chicken coop. Modeled it first to get the ideal reflection angles (avoid fighting over a "best" perch spot, ruining the established pecking order) and get those pesky compound miters easily. Also to better work out the wiring to be neat and safe, well above code. It only loads the circuit to 1/5 of its capacity when maxed and the wiring is super overkill. Basically, it is: GFCI > thermostat > relay > infrared beam > sensor > relay > large 40 amp solid state relay > 4X 100W ceramic heat lamps. Simple, but took up an entire 10 connection terminal block due to excessive safety measures. It can't be turned on unless it's below freezing and there's at least one bird on the perch, so no wasted electricity. Also if the GFCI trips or another IR sensor detects a specific wavelength (fire) the door pops open and the birds can leave out of their little door, and I get an alarm plus a text. Kind of dumb considering how it safe it is, but whatever. It was also about tinkering.
Made from mostly aluminum, ceramic, fiberglass lined with that heat shield material that's good for 2000F. I used a dimmer and digital meter to visually tune the output depending on the weather. Output is 3.33 amps at full blast but I've been keeping it at 2.3 amps at most, putting each bulb at 70% load for longevity and to keep temps down... only really needed 2 bulbs but decided on more thermal mass over higher heat. Anyway, it puts out tons of radiant heat straight down yet everything but the bulbs stays cold to the touch. Much safer than any of the crap at supply stores or online, and more fun. It has cooling/ventilation and lighting functions too, basically keeping the interior at summer time in terms of daylight. I let the time waver an hour just to give at least a little natural variance. Egg production shot up (4 to 6 per day year-round with 6 hens) and the chickens love it. They are very dumb but the first relay is loud and they soon learned that "click" = heat. Every now and then on really cold days (like below -30C) one will go and turn it on for a while before coming back outside.
Anyway, that's about it. Not very exciting but still a fun little project.