Science/Engineering/Technical forums

I was just wondering what the energy density of fusion in the Sun is, in terms of how that might scale to 'hot' fusion (totally random with an indefinite number of degrees of freedom) tokamak-style power generation here. From quanta I could easily google, the calculation shouldn't require more than ...

chrismb wrote:

He was careful to select the capacitor that he took out first as the one he put in first

I did wonder why he was about to put one back in and then put it down and chose another one. On reviewing, I noticed it was the first one he took out. Good call!

Various posts from forums ...

http://www.youtube.com/user/lasersaber#p/u/13/PoEXCweMxhk

Note that at 3:00 the circuit re-energizes (lights the bulb) at the re-introduction of an electrolytic capacitor, when no battery is attached.

Fraud, or something more significant? He has not published his schematic yet (or at least I have ...

It won't be too long now.

The paradigm is a car with an electric motor, a fuel cell that burns anything from plain ole gasoline to swamp gas and anything in between, fed from a tank very much like what is in your car now. No battery other than that required for acceleration/regen braking.

Bloom ...

Apparently GIF files as attachments are not allowed in private messages. TBD are part number for high speed HV diode, uP count input pin number, and the pin numbers for at least 2 G-M tube terminals.

Seems like you could use a lead shutter over scint plastic to make sure it was only reporting hi-energy gamma, with about the same tradeoff as a big tube.

Joe, not only is that is a beautiful piece of work, it makes me feel so much better about buying this crappy little unit with the GM tube too small and too thick-walled to do anything serious, because, like you mention, it can give us a feel for what we want as features. Mine gets about one count ...

I'll be happy to post a pic of this one by Chaney Electronics. All is does is click and light up (it doesn't actually count anything) and since the speaker is coupled to the output of the H/V rectifier, it has a nasty buzz all the time it is on ... I guess they thought you could tell it was on that ...

Here are some initial thoughts, from a starting point of true ignorance in radiation metrology. Please beat it up as necessary, and I will morph the block diagram.

1) In the 90's, all electronic instrumentation became a computer peripheral. Now more so, except connected by wi-fi or bluetooth to ...

OK, Doug, duly noted. Will move this to the best place I can find in the Metrology forum. I don't really have an agenda on the Altoid can thing, except that this may be a good place to move the price/performance bar up a notch for hand-held devices. And considering most of the heavy lifting will be ...