I have a stirling engine from http://www.gyroscopes.com.
Amazing how little a differential it will run on.
Green lasers are amazing. You can (ca 2007) get 100 mWatts.
Maybe some of this is leaked IR, but you can
- pop a balloon (easiest if proximate as its hard to hold still, and you can't do green balloons)
- spin a radiometer
- burn low-melting plastic --theatre gel, keyboard plastic, etc.
- get reflections off very distant retroreflective street signs
Also have geiger counters, rad sources, some HV stuff, some pyrochem. If its forbidden or dangerous, its cool, face it, and there's no way I can stomache restrictions from the epsilons and gammas that abound. Once made x-rays using ignition coils and vac tubes.
