New dart launcher may be better way to inject animals with drugs
>Electromagnetic prototype could improve manufacturing
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>Here the circuit etc..:
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Fig 6 is horrible.
Hardly anybody does good circuit design these days.
Aside from being ugly, at least three things.
That's fine, since the US never was an empire. But we did mostly conquer the world by being what other people want to be.
Use Street View all over the world. Most places look like a suburb of Houston.
Why?
You were doing good up until some evil bastards mounted a stealth takeover. Now you have some demented freak as president who can barely contain his bowel movements who does everything the deep state tells him to. Stick a piece of paper under his nose and he'll sign it regardless of what it says. You don't see the same coverage of Diaper Joe in the US as the rest of the world sees. I can tell you now the unsanitised version ain't pretty. Diaper Joe and his crack-head son have made America the laughing stock of the world.
Am I the only person here who designs electronics? Sigh, OK.
The resistive voltage divider R2 R3 wastes voltage and power.
The SCR high-side switch is crazy for several reasons.
The optocoupler into the second dc/dc converter makes no sense and is probably unreliable.
Why do some people use optocouplers where both the input and output are grounded? It becomes a low-beta NPN transisor.
Why switch only the second dc/dc converter?
We already have lots of moon dirt. It's not very interesting. The Chinese thing is a political stunt. An expensive one.
Why would dirt from the farside of he moon be any different from the rest of the moon dirt?
Space is mostly vacuum. Why do we need to kill humans to "explore" vacuum?
A recent study suggests that people who go to Mars will have kidney damage.
Most of us don’t make that much down here either. ;)
Cheers
Phil Hobbs
1000 years ago 80% of the population was farmers who barely grew enough to survive. Clothes were so valuable that people were killed for theirs. Most people were illiterate and lived in the dark when the sun went down.
Progress has made us so efficient that probably 80% of the developed-world population now has zero net productivity.
Well, given that 100% of what gets counted as productivity is devoted to things that quickly pass away, it’s hard to get too worked up about that.
Materialism (of either the philosophical or the vernacular sort) ends in futility.(*)
Cheers
Phil “ray of sunshine” Hobbs
(*) Fortunately, both kinds are mistaken.
Well, people do like food, energy, shelter, and transportation. Material things. I'd guess that 20% of our population makes that stuff.
The rest, entertainment and fancy cooking and legal services and art and music and most government and most education is kinda luxuries.
Medicine is a big biz and mostly worth it.
Electronic design is maybe half fluff these days, entertainment.
Those farmers might have been starving, but they had resources. For example, they could grow a large family and sell off the kids if they have a bad harvest. They could organize a mob and pillage the neighbors crops. Every culture has a festival to mark the beginning of the harvest season, which oddly coincides with the beginning of the pillaging season.
That's a rather high price to pay for wearing the latest fashions. Unfortunately, little has changed over the last 1000 years: "BEWARE AND BE SAFE !!! SNEAKERS GETTING ROBBED / STOLEN"
Today, people are more literate but continue to do stupid things. Literacy is not a good substitute for intelligence or a cure for stupidity.
That would be the dark ages. They didn't last long to do much real damage. Also, we still have regular planned power outage holidays to remind us of those days. Here's a map of California showing past PSPS (Public Safety Power Shutoff) events.
In FY 2023 the IRS processed 162 million individual tax returns. That's out of a total population of 333 million. Subtract 74.4 million children age 0 to 17, most of whom are not required to file a return: 162 / (333 - 74.4) = 63% of US adult population is productive or 100 - 63 = 37% are non-productive.
Nearly all ages until most people could afford gas and then electricity. Even tallow candles were too expensive for most folk, and fat/oil was for cooling and eating, not burning.
Just being paid doesn't mean people are productive.
Retired people, and people with passive incomes, and useless people pay taxes too.
That's hilarious. A tumbling dowel pin at 200 feet/sec. That might not even break skin.
Imagine that in a battle with even a .22 rifle. A .22LR is about 1200 f/sec and the rounds arrive pointy-end first.
sure it is a toy made with random development boards and 3D printed plastic, but everything has to start somewhere
It reminds me of a rail gun. Gunpowder packs a lot more energy per volume or mass than capacitors. A lot.
As gasoline packs a lot more energy than batteries.
I wonder why that animal injector thing doesn't just use a spring. I have a blood sample lancet thing that has a spring; it works fine. It's cheap and no batteries are required.
You could use a lower power green laser of say 10mW to temporarily blind your assailant instead, Jan. That blue one you have there is pretty extreme for neutralising a wouldbe thief and would probably burn through half his brain as well!
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