Hackentosher

So the power rating of a resistor is the maximum power that resistor can dissipate before it burns. The power dissipated by a resistor is equal to the voltage dropped across that resistor multiplied by the current flowing through it. Using some Ohm's law substitution, we can also find that the power dissipated is equal to the voltage dropped across the resistor squared divided by the resistance, or the current through the resistor multiplied by the resistance. 
 
In your 10w parallel circuit, assuming the voltage remains constant, the two resistors will each pull the same current and dissipate the same amount of power, so I guess your analysis is practically correct. At first read I was a little confused because it seemed like you were saying the power handling of an individual resistor can change depending on its configuration which is not the case. However, from a modeling perspective you can do this by combining resistors. I hope this didn't create more questions than it answered, but I'll be happy to answer more.
 
When resistors are in series, you have to be aware of the voltage dropped across each resistance in the series, and the power dissipated by each compared to each individual rating. Say you have a 5W and a 1W resistor in series, you have to check (using P=V^2/R) that the power dissipated by the 1W will not exceed 1W and the same for the 5W.

This really messed with me on my Golf too. I don't miss that weirdness.
 
 
On another note, I really dig the fact that you can now get decent DIY ceramic coating. I did my car a few weeks ago and despite driving up a gravel road and over a bunch of asphalt, a quick powerwash made it looks clean again!
 

The Art of Electronics is pretty widely regarded as the holy text of practical electronics. It covers the underlying theory that’s important for understanding the interesting stuff. But it does place emphasis on more practical knowledge and circuits. 

The Art of Electronics is pretty widely regarded as the holy text of practical electronics. It covers the underlying theory that’s important for understanding the interesting stuff. But it does place emphasis on more practical knowledge and circuits. 

It's called history, not cultural bullshit. Science is about why things work the way they do as much as how theories (even ones that turned out to be incorrect) shaped our view and guided our research. Giving you this gives you both context of how we arrived at what we now think is correct, as well as teaching you the evolution of thought processes. Even incorrect theories can be a useful stepping stone to the correct ones (e.g. the Bohr atomic model isn't completely correct, but still useful)
 
It's a book. It's literally made specifically to explain these things to you. If you don't care for it, just skip to the bits you want to read and just read those. A good textbook will still have the detail you are looking for. It's just that your knowledge will have no context.

Most books I encounter are like this and that's probably why I hate using books as resources of info. Do you have more specific than electronic books? That's pretty broad 

My UT210-E has a phenomenally accurate DC current clamp. I truly wasn't expecting it to do so, but it was accurate to within 100mA iirc.

I guess the best way to explain it as more like solving a puzzle, where changing details in one part of the design can effect how things are somewhere else. Depending on which pins on your microcontroller/etc. do what, you may want to rotate it to get them closer to where they need to go on the PCB or to prevent excessive amounts of crossing traces with vias. You might need to tweak the design to accommodate changes in part sizes or board shape.
 
It's a design process; there's not a perfect algorithm that creates perfect PCB layouts when you drop in a couple parameters. That's why humans still do a lot of the design process instead of trusting autorouters without checking.

eh? https://www.thingiverse.com/search?q=ender+3+enclosure&type=things&sort=relevant

AFAIK it's used to maintain or generate the correct impedance and signal timing. 
 
For example if you have two traces, one sits right next to the source and the other is on the other side of the board, the closer one would throw some waves in order to be about the same length as the longer one so the signals are roughly the same (if required). 

The battery won't care, but the charger might if the battery tries to pull 2A from it. 

Yeah, it's kinda light on self replication & I bet your right about the price & standards. I love the results & performance because a well tuned voron is beating every comparable printer more expensive than it. My qualm besides having to order parts from Hong Kong & eBay & cross my fingers it's all legit, is that it's still 1k & like you I'm a broke ass University student (I literally just picked up a free last gen PC off craigslist to scrounge parts for my build). I can't afford a replacement part if the kit isn't legit or I make an error in assembly but I know that if I buy an ender 5 pro today, barring an insanely unexpected new comer coming to market, I'd be wanting the voron 2.4 and buy one as soon as I had the dough.

It looks promising. Assuming this one doesn't reset its counter after a certain value it should do the job.
 
Edit: Thanks for pointing me in the right direction, I've found a similar product (couldn't get that exact one where I live) and according to the specs it's exactly what I need.

Maybe a vfd into a rewound variac? I hope you know what you’re doing. 

This has probably already been discussed somewhere in here but the Ford Maverick coming out soon is super interesting to me.
It’s a 4 door hybrid small pickup truck about the size of the old ranger, gets 35mpg and costs $20,000 for a base model, with the hybrid engine.

For comparison a base model Toyota Corolla is $21,000ish
So this is the price of a Corolla but it’s a truck.
I feel like if Ford can make enough of them they definitely have a potentially super popular product on their hands. 
On top of that it’s a whole new sort of look, it looks kinda strange, but it doesn’t share a lot of the same modern pickup truck design elements you see now, like being super tall and having an aggressive flat front facia. It looks very neutral and that’s appealing to many people.
It comes in mostly neutral colors except for 3, a darkish red, yellow orange and a brighter blue.
The interior looks roomy and simple, it has a touchscreen console like all cars do now but the hvac controls are still all analog, the dash only has a small display, there’s not a whole lot going on in there.
Seems nice, they really committed to the economy truck idea, hell the base model only comes with steel rims, you don’t even get hubcaps.
It comes with a sheet of measurements for wooden boards to put in the bed in specific spots to make braces.
Everything Ford shows it doing isn’t like “watch this gargantuan fucker pull 80,000 pounds of RAW AMERICAN STEEL UP A FUCKING MOUNTAIN”, it’s more like “if you open the gate on the back you can fit a few bikes in there”

the engine bay is a mess which may be a concern, I imagine getting to anything in this rats nest would be a pain


“look, it can barely hold these plywood sheets, but it does work sorta”

they know exactly who they’re selling to and I think it’s gonna work out great for them

I resisted diving in to this conversation in my first post on this thread because the question was about a clock not whether RF is harmful. I can see it quickly spiraling out of control and wanted to post this video from respected electrical engineer Mehdi Sadaghdar debunking 5G conspiracies, and thus general RF misinformation, before the thread gets locked. The content of this video also goes into how the EM radiation from sunlight is vastly higher frequency and higher energy than even some of the highest power radio sources in our daily lives, and we're all fine. In general I think it provides a bit of context on some of the physics that make our modern wireless world possible and I recommend watching it in its entirety. He also listed his sources in the description.
OP, I'm sorry you had a cancer case in your family and I am happy to hear of a speedy recovery, but you made a lot of claims in your last post without a scrap of support.  Do you have any citations backing them? You are free to rid your home of wireless devices and I can respect that, but as @mariushm pointed out, your home is already bombarded with RF across the spectrum. Hell, you even suggested solving your alarm clock problem but getting a clock that receives a radio broadcast to synchronize. Putting your phones in a faraday cage wont change the ambient radiation in your home. If you wanted to, you could get an RF spectrum analyzer and measure the difference for yourself. I am very interested if you do have any scientific papers exploring potential links between RF and cancer, as I am an electrical engineering student currently working in the EMI lab of one of the world's largest Aerospace contractors. If you have any resources, I'd love to read them and continue a civil discussion that is not built on unsupported claims, but we're getting pretty off topic from clocks pretty quickly 🙂 

Non ionising radiation at the amount produced by RF transmitters in day to day life does not affect humans.
 
The warning you see on some electronic devices for very short distances, is to prevent heating of your skin/tissue due to microwave radiation, which is purely a thermal effect and doesn't affect DNA (aka doesn't cause cancer). This heating effect is also very weak and plays no role in practice.
 
as @mariushmpointed out, your house is still being radiated by all sorts of other transmitters around you. On top of that, you're still using mains power, which means you're literally inside a mesh-antenna made of power lines.
 
If you don't believe me, borrow an oscilloscope, hook it up to yourself, and be amazed at the huge 50Hz sine wave on the screen. Oh and yes, you're paying for that.1
 
1) They're not
2) they don't allow wireless crap to prevent interference with critical medical equipment, it has nothing to do with the patients being exposed to RF radiation.
3) they actually do allow wireless stuf nowadays anyway.
 
PS: If you want an ultra accurate clock, just use your phone in airplane mode. I assume during the day when you're outside it's not in airplane mode, so it'll be able to synchronise its clock during the day, then during the night it'll be set properly.
 
1 curious if anyone got that reference

I'm sorry you have or had cancer, and I'm happy you got better.... and my comment won't really help and it's unlikely it will change your mind...
 
You are seeing the effects of placebo and medicine... it had nothing to do with wireless and phones. Your rooms, your house, is still bombarded with cellular phone radio waves, no matter if your phone is near or not. 
Your phone is a radio receiver and a radio transmitter ... while idle, it just sits there with the transmitter turned off or just turning it on for a few milliseconds every few seconds ... otherwise it just receives a "ping" from the wireless networks around you "hey, you're still connected to the network, nobody's calling or texting you"  There's more things around you that produce more harmful radiation than your phone.
 
You still have wireless networks around you, wireless signals still go through your walls, through your rooms. The levels of radio waves your wireless cards produce are so low that they can't even penetrates skin or a few cells of fat.
 
Unless you create a Faraday cage (basically mesh of wire or downright cover your walls and windows with aluminum/metal foil to block radio waves) or unless you move somewhere a few miles away from any radio transmitter, you're out of luck.

It's only about $20 for a clock that synchronizes to atomic standards. Obviously I don't mean buying an actual atomic frequency standard.
 
Quartz crystals are viable, although cheap 32K crystals generally have tolerance of around 20–50 ppm, which is a deviation of up to about 10 to 25 minutes per year. The utility frequency that you advise against is typically more accurate than this over the long term. You can of course find lower, the first clock I made was based on a 0.5 ppm (15 seconds per year deviation at most) quartz crystal, but you have to know what to shop for. And if you're not into electronics it will be easier and more effective to buy a $20 atomic alarm clock.

Fusion360 is a much better user experience than FreeCAD, but does have some limitations. OpenSCAD is another good option. 

Fusion 360 if you're not commercial and can work around the free version limitations. If you can get a student license (haven't had to apply for a student account in a while, usually they don't look too close), definitely do it.
 
Otherwise, FreeCAD is kinda taking the maker world by storm after the licensing change with Fusion because it is FOSS. If you're new to CAD and just learning, I would probably start there, but in my experience (and bias) Fusion is more intuitive.

No piece of test gear is perfect. There may be noise in the amplifiers, there may be some EM energy the leads are picking up from the environment. Usually when open circuit, these things are not that big of a deal. Also your probes are very imperfect. Measure a resistor on a board and watch the measurement fluctuate when you wiggle the probes around on the part.
 
Also a 0.002k fluctuation is 2 ohms. I wouldn't classify that as a lot, that's 1%. Most resistors are +/-5% anyway.

No piece of test gear is perfect. There may be noise in the amplifiers, there may be some EM energy the leads are picking up from the environment. Usually when open circuit, these things are not that big of a deal. Also your probes are very imperfect. Measure a resistor on a board and watch the measurement fluctuate when you wiggle the probes around on the part.
 
Also a 0.002k fluctuation is 2 ohms. I wouldn't classify that as a lot, that's 1%. Most resistors are +/-5% anyway.

It really depends, but that's pretty slow for most materials. I usually print about 50-60mm/s. Look up some recommended print settings for the material you're using.