mcnugget · HackerTrans

You could join the resource industry, there's a labor shortage and there's all sort of vocational training. Some jobs require minimal training others more but you can be up and running in as little as 3 months for something relatively skilled. It's a refreshing feeling to have a job where the deliverables are very specific and day to day like you need to move this crap from here to there and that's it, no thinking about tickets or infrastructure or having to liaise with 8 stakeholders, nah bro supervisor said you need to help the guy move the drill cores, that's it for the next 5 days.

mcnugget

4 年前議論

You can contract the pcb work out on fiver and have the boards made at one of the Chinese board houses nowdays. I think I've seen people on Fiverr that provide turn key solutions you pay for it in turnaround spread and back and forth though.

mcnugget

4 年前議論

Yea, the difference is in capex cost and capabilities so the best you'll get is the ground temperature. Ideally you put a ground source heat pump but the energy needed to run it is high, COP for a ground source heat pump is like 3-6, cop on earth tubes are like 30 because you're only running a fan but you get whatever temperature the ground is.

mcnugget

4 年前議論

The tubes are called earth tubes or ground-earth heat exchangers. If you look for geothermal heating you'll end up getting the wrong information, mostly for ground source heat pumps. The earth tubes aren't strictly speaking geothermal though, they're massive thermal reservoirs that you're taping into. You extract heat and then putting it back later either from day-night cycles or seasonal cycles.

mcnugget

4 年前議論

You wouldn't be able to know how many years exactly from the core drilling visuals, for that you'd need to assay the cores for the grades, build a mining block model and then develop a mining plan from that. It's more of a qualitative "oh dam they've struck gold a lot of it" sort of thing that would move markets. Disclosures to markets in mining need to be done publically and with proper backing of data, legacy of BreX salting their core samples and reporting the motherload of gold mines.

mcnugget

4 年前議論

Dam, didn't think I'd see another mining person on hackernews. Exploration geology that far down is wild. Was it core sampling all the way from grade or only in mineralized zones?

mcnugget

4 年前議論

Make a shield for an Arduino, kicad has a template for the dimensions and positioning of the headers. A fun one is to make your own Arduino board, take the design for the uno and layout your own version and see if it works, there's plenty of guides on how to position stuff and it should get you introduced to the more complicated concepts in PCB design. Order the board from jlcpcb, can't beat them in price for 2 and 4 later PCBs.

mcnugget

4 年前議論

Tried that, management still insisted I get all of it from Fastenal, great pricing and they have an online catalogue, but ffs it takes a week to get stuff in.

mcnugget

4 年前議論

10/10 agree for Canadians McMaster Carr is a godsend. Can order random stock material and have it tomorrow and have a certificate telling me exactly what stuff is with a nice cad model. Their search is the best though, can write some half assed description of what I want and it'll just deisplay what I want. Their mobile website is garbage though.

mcnugget

4 年前議論

Energy input is the other. It takes at minimum the combustion energy to reconfigure the molecules but most of the processes happen at high temperature and pressures which takes energy to do.

mcnugget

4 年前議論

Bit flip probability is inversely proportional to density of the storage media so denser might have you run into issues. Also theres no point on building a recorder that's 10x larger than what you need if you're going to be limited by downlink availability. You could probably get away with all those SD cards in LEO though for a short missions, JWST falls into the category of missions where the price of that storage medium is going to be a rounding error vs the price it would incur if it randomly failed during qualification.

mcnugget

4 年前議論

The worst is when the other guys think you're crazy because they're not suffering the same problems because either the smps they have had a soft start or they overspeced the living crap out of their input stage. I gave up and just spend the 5$ for the IC that provides slew rate control, single IC with a single fet? Oh hell yeah.

mcnugget

4 年前議論

Real world effects of parasitics are underated. Found out the hard way that there's a whole lot of pain involved with hot plugging a battery into a board when there's a modular switch mode power supply onboard. Oh, you have a low esr ceramic cap on the input? Lol, the parasitic inductances of your wire and traces have formed a tank circuit and pushed the input voltage well above the unhappy voltage of something. K, you fixed that part, nope, lol, your inrush current is actually 15A because you had 68uF on the output of the smps and somehow you burnt out the internal fet of the smps module. Goddam nearly flipped a table.

mcnugget

4 年前議論

Until the REM is up and running, then truly never need to go outdoors.

コメント