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4hv.org :: Forums :: General Science and Electronics

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LAN_403

Part Scavenger

Fri Feb 17 2006, 01:17AM

Registered Member #79 Joined: Thu Feb 09 2006, 11:35AM
Location: Arkansas
Posts: 673

This one boasts adjustable delay. Just move the mic nearer/farther from the source.

Tesladownunder

Sat Feb 18 2006, 01:27AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

joe doh wrote ...

Peter, dont get excited about your CDs, thats sooo inefficient. I've got a 8" laser flashlamp in my basement that might do the trick if it was mated with your cap and a good, i.e. large, reflector.

Inefficient? I wouldnt be so sure. I imagine the emission spectra of Xenon is more efficient than that of oxygen/nitrogen in air, however, in the case of a CD there is ignition of aluminium as well as a flat plate radiating surface. After all the "flash" in a flash/bang grenade is aluminium.
I have a photodetector that gives 20mV/mW and this might be able to quantitate things better and read the peak light intensity compared with a Xenon tube. Or I could simply use a fresnel lens to try to burn paper.

Peter

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