Recent content by DeepCut

We don't even know the intricacies of lightning so to try and puzzle out the universe will take us a very long time.

Maybe not the correct sub-forum for the question, but is the total amount of water on the planet constant ? I know the basics of meteorology and the whole sky, sea and land cycle but we put so much water into the land, how does that water get recycled ? If it is constant then why is it...

Will we also be getting a new paradigm in physics ? ;+}

I see what you mean about the HPS lamps. And what a handy property of Neon with the AC/DC detection. Seems that tungsten is the most common material for filament electrodes, it has a melting point of over 3K degrees though.

Thanks Nascent :) So one electrode is active if on DC and that is orange, both electrodes are active alternately in AC and that is orange, but both active at the same time (arcing) gives purple. I wonder if that's because the arc is effectively a short-circuit so the current is at it's...

I binned the bulb when i realized it wasn't working, it had blackened on the inside but i didn't examine the electrodes. I'll do it again tomorrow and see what happens to the electrodes.All the best, DC.

That's interesting, I've been wondering what material the electrodes are made of and can't find anything on the web. My current was limited to 2A but i think it happened at around 1.6A.The seup i was testing with developed transient spikes of around 600V but the current was only 150mA on an...

Ah, great, thank you again :)Gary.

No, higher RPM results in more voltage. The problem is solved now, just move the magnet nearer, because the B field drops off in strength in a big way as you move further from the coils. Thank you, DC.

N is the number of turns in the coil, A is the area of the magnet face and B is the magnet strength in Tesla. I think I've got that right.

Thank you Simon. The colour it had was purplish, so I'm thinking around the 450nm range. Here is a picture i took before the bulb blew : I see what you mean now, of course, red, green and blue are its primary emissino spectra so a mixture of thtese is white. Thank you very much for...

Thanks for the answers, sorry i never replied before. Massive life changes took me away for over a year ! DC.

Hello, I was recently pulsing a coil at fairly high voltages (200-600VDC) using DC squarewave, at fairly high frequencies (100Hz - 1.3KHz). The output of the coil had a Neon bulb attached. I wasn't measuring current output at the time. At one point, i don't remember the frequency or...

Hi, i am developing a home-made generator but i am having some trouble with coil design. Going on Faraday's induction formula : V = N A (2 pi RPM/60) B a 50 turn coil with a radius of 20mm going at 20,000 RPM should give me 80 volts or so, in practice i am getting much less than...

Thank you Livect.