h4nd

I'm doing a wee PCB with some radio boards. Interestingly ,as uProcessors and peripheral devices are getting more complex and more configurable, there's less 'glue' logic and parts these days. I have just now added R31 and R32, so I get some small satisfaction from that

Looks great, but I'm surprised at how far forward you're mounting the turbo. I had no idea that cold trans tunnels was such a problem with these

Great work. I could spin you a PCB to replace those wires in about an hour, right after I do a thing for Runamuck. (If you do a crystal clear wiring diagram, and maybe figure out mechanical support).

Use braid for the Gnd, VCC

That's really timely, as I'm considering modelling some combustion stuff, and OpenFoam is one of the options I was considering. I have some Clause-code for ESP32 video compression to review soon. It'll be really interesting to see how that is, i'll report back.

piiiiixxxxx

I went to the model trains place today, and it was ace. I got yarning to a friend (ex yank) who's a member of the society, and I got started trying to con him into building a 'Turbin' powered loco. He's not stupid: it is of course a terrible idea. No one wants a train that melts bridge decks anymore: https://en.wikipedia.org/wiki/Union_Pacific_GTELs ... and you'd need to find some unobtanium RC turboprop engine to pull the power electricity off the shaft. like these: https://pacificrcjets.com/collections/kingtech-turbines/products/kingtech-k-30tpg4 but he wants to find one of the tiny kubota engines, and build the clubs first actual diesel electric. Anyway, I got to looking at tiny gas turbine engines, (like car turbocharger ones), and of course, everyone's doing it wrong (😁). Radial compressor and turbine makes good sense for small units below 10-20kW, but -hobbyists don't tend to put in heat recuperators (25-40 thermal efficiency gains), and interestingly, china can help here from just $116 https://www.aliexpress.com/item/1005006746007538.html But as I pondered state of the art, i remembered some amazing microwave lenses a dude was working on, using 3d metal printing: https://www.youtube.com/watch?v=3YMRfw0uWlw and I realised, of course! 3d print heat exchangers! Sure enough, someone had thought of it before, so: https://hackaday.com/2022/10/31/3d-printed-heat-exchanger-uses-gyroid-infill-for-cooling/ The other problem is, that people line up the input shaft with the output shaft for easy coupling: so then the (very high speed) airflow has to bend all over the show, and the ratio of in/out RPM is fixed, so the efficiency goes to shit. Piece of cake nowadays to put a modern BLDC motor / generator on each of those shafts, to line up the airflow nice and straight, and allow tuning the ratios for max eff use 3d printed heat-exchanger / recuperator with nice thin walls for efficiency (per kg cheaper), and bang a 2nd turbine after the 1st, to scoop up more of that sweet enthalpy so, turning the turbine blowtorch into part blowtorch, partly more useful turbo generator engine, for your track bogie DC motor needs. and noise. I'm H4nd and that's my story, and I regret to admit that the law considers me an adult.

Wow, that got a hiding. Later in the year, I'll be able to look at stuff like that, but I have a bit of a queue for things I've agreed to do, sorry. It looks like a pretty garden variety 600V 1A diode, Jaycar have something like 'em with and without leads: get a temperature controlled iron with a nice meaty tip, and have a go? (use flux cored 60/40 or thereabouts solder). the real stickler issue, is what else did it take out when it failed?

I'm beginning to think I'm the only one around here with a bastard file. So, I heard you like RF amplifiers, so I put an RF amplifier on your RF Amp. BUT, it is approx 1000x wideband RF gain, and it worked, so there is that.⁩

Looks perfect, just whang a toy RC mother in there to run the needles. Anyway, this animation of a hydraulic schematic is a beautifully clear piece of engineering communication:

Ah yes, those. And how is that steel?

The mech bit and motor choice is the hard bit, I can help after that

I needed to plug a camera into a phone, and it had the wrong thingy. But I had a socket, a broken cable, and an adapter to the right thingy. Also fuxed.

I made a gadget to thrash locks, for a locksmith...

Of course, you could put a 12V Zener || 100nF inline with the ref (Gnd) of a 7812, just check if the heatsink is insulated...