@KyranF it seems like "scrapers" saw an opportunity, bought up all the stock, and are now trying to sell them on eBay and Alli-whatever for 4x-40x the cost. Whatever you do, do not buy from those places! I'd rather be without than paying a scraper for being manipulative of a global pandemic.
I always have the feeling that those are people that weaseled their way through some interviews and now need to cover up that their job is waaaaaay over their head. I am usually constantly monioring stacks if any of our people here might have posted something there..
The Rory Award for "Most Reckless Use Of Goto In a Serious Library" goes to this library I just tried to use, which, though a very clever end-of-function goto, always prints an error code, even if it succeded.
It is easy (and certainly human nature) to think the things you see is what there is and anything needs to be found within that domain, as such for a learning experience it's quite important to widen the scope if the visible to a maximum, or one might start seeing a devine creator where really thermal noise is the problem.
Yahoo is shutting the Yahoo Groups down in the middle of December. They are shutting it down completely, and archives (conversations, photos, files) will no longer be available. If there's content which you know is useful, then squirrel it away while you can.
Once I had to measure the pulse current in a big flash lamp (which used polypropylene caps, very high-current pulses.) Thinking "this should be good enough", I bussed 10pcs of 0.1Ω 1/2W metal film resistors in parallel. Worked great, for a few pulses... then the resistors began failing; surface film literally blown off. Got the measurement, but even with anticipating the high pulse current and using what I thought would last longer, these were otherwise totally not suitable.
While the chosen capacitor has similar specs, these are not all of the specs inherent to capacitors. Characteristics such as ripple current, ESR, ESL, even construction details were taken into consideration when selecting the original capacitor. The replacement might work, once, or even for awhile, but is unlikely to be a suitable replacement unless specifically rated for pulse applications.
Any Magnetic Gurus know how to design 2T bipolar 1kW pulses in a cool coil with 33 Hz SINUS pulse near 300 Hz BW ? Here is my failed attempt with thermal issues. It needs to be more like 0.1% PWM not 50% tinyurl.com/yxf25w4b > I am working on acoil design too andDCR,ESR,Ron are all critical
@NickAlexeev . At Motorola back in the late 70's, all of the children born to the engineers in the transmitter group were girl babies. There was jokes (semi-serious) about making tin foil jock straps for the guys.
@Kortuk One time I tasted a beautiful vintage 400V 150mA adjustable supply. It had a nice pop with a general mouth feel of lightly cooked meat and copper. The nose on the supply was an exotic warm dusty phenolic with hints of overheated carbon composition resistors. I would rate it 97/100
Not sure what you mean here. If you throw a big enough atomic structure of rock at a thin enough atomic structure of glass, you've just thrown a rock through a window.
Some ardweenie asked "Why learn basic electronics [when ready-made hardware (Arduinos and such) is so convenient] ?". Dave responds. We should make every new member watch that video.
