If you need to remove components with many pads, like connectors, it can be daunting without Low Temp Solder Wire. Chip Quik.
Btw, I use acetone for cleaning PCBA's, and actually almost every day, and right now, in a professional R&D lab. Residues of soldering wire, after SMT component removal, before new component gets in - it goes away with cotton bud soaked in ace in a few strokes. Never destroyed anything in my whole professional life, 35+ years now, working in consumer and industrial PCBA repair service. Isopropyl works of course, but slowly, and not so clean pcb stays. Depending on the type of soldering wire. I never use lead-free for repairs.
During soldering though hole, you need few seconds to heat up the pcb copper and a component lead. They should be on on the same temp for second or two when solder gets melted around. You can even see pad hole capillary sucking melted solder.
I've seen young people soldering THT, by shortly touching component pin and and a pcb pad. This looks baad.
I built many such oscillators same way. But I used BC107 NPN, connected collector to the ground, emmiter to resistor/capacitornet. Base free. Add LED in series with such connected transistor, and you have LED blinker.
It's fun reading all that posts about dangerous caps, dangerous flyback transformers...
Those fears, and your findings I can read - were/are something normal in my world. I was paid to do that. But faked technology advance, ruined service techicians job. And now mices take over... So you have it. Deal with it. And be afraid - be very afraid :)
Everything went well then. I graduated without computers help - on computers. Today it's vice versa. Today every new os version - just new clicks or taps, for poor little John to make it with less clicks, and this is always presented as biig advance in computer field. Yes, I mean Microsoft and Apple and .... Everything screwed up for the sake of profit for the shareholders. Every new tech carries the burden of shareholders just thinking of profit.
Beside all of that, if you convert let's say 1/10 of cars with internal combustion engines to electric motor cars, there is no electricity to charge them. Which also leads to envirnonmental problems - creating so much electricity (+ CO2 emmision from thermal-electric plants). Just count average low electric car consumption 15kWh/100km.
While true if you haven't noticed it Solar and Wind are taking off at a staggering rate for electrical production. At prices around $15 per MWH they are substantially cheaper than gas/coal/oil electrical production. The economics just work out now in a big way and renewables are so much cheaper fossil fuels days are numbered.
Besides if you just car about the economics and not the potential reduction on the planet they are still cheaper to run over their lifetime compared to petrol.
If renewables are substantially cheaper, why did the UK and the rest of Europe have an energy crisis and record energy prices?
The two things don’t add up, on one hand you have people claiming renewables are cheaper than ever, on the other you have skyrocketing electric bills. If renewables don’t actually decrease energy prices for consumers then claiming it’s cheaper is misleading.
There's a war on and some gas lines were blown up. Consequences: A cold winter last winter, and countries scrambling to build expensive LNG terminals.
Last time I looked in this corner of Europe, it takes about 3-6 months to get an appointment to install solar and/or an electric heat pump. Installers can't keep up with demand, and they can't train new people faster than they're already doing.
That definitely isn't happening because the gas alternatives are so cheap.
Energy prices are high not because people are converting. They're high because of the shock caused by the (then) sudden unexpected war in Ukraine, and people simply can't convert fast enough.
> What senile, old, corrupt and/or stupid politicians decide isn't necessarily the rational choice, and in fact is often the opposite.
For example, these smirking German assholes, who I would have enjoyed seeing being interviewed last winter after Russia knocked the dumb smirks off their faces: https://www.youtube.com/watch?v=FfJv9QYrlwg
Because they don't have enough renewables yet and run on gas. It was gas prices that went ridiculously high after Russian gas was shut off and there wasn't enough.
Big power plants are more efficient than small ones, otherwise everyone would have a generator at home. The question is what difference batteries make.
Of course it isn't. I don't vote for internal combustion technology at all. Both are environmental problem. Looking at all the (ex) hype about electric cars, sometime it looks like electrics - they clean the environment...
Internal combustion will stay for a long time in heavy machinery, sea and air transport, which is also problem, if not prevalent, so electric cars will bring negligible health improvement to planet. And add all the wars - our efforts to lower carbon footprint on this planet are so funny and naive.
In my middle school 1983 we had similar, but with SC/MP uP, hex keyboard, 8 LED output port. We called it scamp, learning machine code and basics of architecture. Advanced students worked on a Cromemco, and we, dumbasses, we learned on that scamp.
