Science/Engineering/Technical forums

I used a comparator and converted the signal to a digital output. I used very tight criteria to avoid false signals. You have to be very wary to ensure optimised EMC protections because amplifying the corona current does, indeed, naturally lend itself to picking up RF interference. I also included a ...

You need a high impedance preamp to help discriminate the pulses. One every few minutes, to background for the boron tubes. The best way to plan what you need to do is to watch the pulse signal on an oscilloscope and decide how to window for the pulses you are typically seeing from it. Depending on ...

In regards machines that mechanically incorporate a series of programmed steps, have you seen Jean-Joseph Merlin's swan, made in 1772/3:

Really? Oh, yes, I fitted a new transorb, slightly the wrong package size but fit for the job, and managed to get it all back together, and just taped it up with insulation tape (because you have to physically break the plastic cage all the boards sit in to get it out - 'not a serviceable part' I ...

For interest, I seem to recall I have pinned up photos of the innards of my PKR-251 somewhere here (when the linear power supply I was using to power it blew a transistor and ran 60V into it - the directional protection diode did its stuff and blew, and all was fine again once replaced).

I got mine ...

"Douglas Coulter, Talent".

Ah! If only someone were to end my name with the word 'talent', I would be happily flattered! :D Instead there is only a string of boring professional letters which has only served to lead me into being persuaded to sign up for equally exploitative industrial roles! ;)

You're not. Looks like the right forum to me. So is the conundrum that nothing truly meets the event horizon in 'any real time-line' your one and only objection to rejecting black holes as a hypothesis?

Hello David, I can see you might end up getting me to go into my description of the geometry of our Universe, here. I think I 'threatened' to do it once before already!

It may square your thinking with the traditional view of the 'Big Bang' for me to say that as I see it there is a 'Big Universe ...

Hi guys. Sorry I've not been around much recently. Thought I might make this contribution: Folks here are here because you have personal knowledge of their previous activities/contributions. So, clearly you need to expand your criteria if you're going to let people from further afield come in. The ...

Some tid-bits I just came across on the Renault UK website:

"Lithium-ion batteries do not suffer from the so-called memory effect resulting from incomplete charge cycles which can ultimately lead to a drop-off in capacity in conventional batteries. These compact, innovative lithium-ion batteries ...