Experimental Modern and Quantum Physics for Do-It-Yourself Science Enthusiasts 

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USA Science & Engineering Festival in Washington DC

We just came back from the USA Science & Engineering Festival in Washington DC, where we had the pleasure to meet fellow diy Science authors Theo Gray (Mad Science, The Elements, Popular Science’s Gray Matter, etc.) and William Gurstelle (Backyard Ballistics, Whoosh Boom Splat, The Practical Pyromaniac, etc.)

 
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Posted to www.prutchi.com: diy High-Power UV/IR/Visible Flashlight

I just posted detailed instructions for the construction of a high-power (10W) flashlight that has interchangeable LED heads to produce UV, IR, or visible illumination. The URL is http://www.prutchi.com/2012/04/27/d-i-y-high-power-swappable-head-uvirvisible-led-flashlight-with-intensity-control/#more-1091

 
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New Isotope/Geiger Tube Holder at Images Scientific

Images Scientific Corporation just announced a new Geiger counter wand base provides a stable platform to hold the Geiger counter wand for experiments. The physical dimensions of the holder are 2″ wide by 12″ long. The length of the sled has markings in both metric and imperial. The sled isotope holder provides a stable and moveable

 
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Perkin Elmer C30902E SPADs on eBay for $91 (Unrelated to Authors)

Someone (I don’t know the seller) is selling brand new Perkin Elmer C30902E Silicon Avalanche Photodiodes on eBay.  Auction number:  200747161278. These are NOT chilled by a thermoelectric cooler, so their internal noise may be too large for experiments with entangled photons unless you rig some sort of external Peltier element to keep them chilled.  However,

 
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Is That Girl With the Green Hair Talking About Quantum Physics?

We had a very nice book presentation and discussion last night at Barnes & Noble in Marlton, NJ.  Quite a few curious shoppers stopped by while Shanni presented a lecture on diy Quantum Physics.  Thanks to our very few, but very loyal fans 

 
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Lecture on “Do It Yourself Quantum Physics” and Book Signing at Barnes & Noble this Tuesday

We have been invited by Barnes & Noble in Marlton Circle to their Educator’s Night to lecture on “Do It Yourself Quantum Physics”: Educator Event Teachers are invited to meet authors David Prutchi and Shanni Prutchi for a “Do-It-Yourself Quantum Physics” night! Book Talks, thank-you bags, fun and door prizes also. CEUs available for attendance from 6:30 to

 
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Telling Apart 365 nm from 395 nm Ultraviolet LEDs and Flashlights

Today I received an UltraFire WF-502B UV flashlight advertised as emitting at 365 nm.  I was wondering how to tell if it really does, especially since vendors commonly list it as emitting 365-400 nm. Well, I was in Canada last week, and had $25 Canadian left over in my wallet, so I tried this flashlight and compared it to

 
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