Recent content by AJ_Dual

Admittedly a complete WAG on my part, but I think the low sensitivity to red is why some cats chase it harder than green. (mine does) It seems more "camouflaged" to the cat, like a brown mouse in brown grass, where the bright green is too obvious and artificial.

The issue though is he is entering into a SCIENCE fair, it's not an ENGINEERING or TECHNOLOGY fair. Not the same thing. We need to help DoctorEvil come up with a hypothesis, and then a method to test it. Now, with the nominal state of the education system these days (as it was when I was...

My vote is for the Luzy.

I'm wondering aloud if some sort of heat-sensitive bi-metal springs could be cleverly worked out to actually provide steering as they warmed up and resist the way operating heat would warp the knife-edge optics mounts.

Eat protein, and high fiber low starch vegetables. Skip the carbs and starches. Your body can't really engage in lipogenesis effectively with dietary proteins and fats, and keeping your insulin levels low also controls hunger pangs in the stomach as well. Lipogenesis, or the laying of extra...

It would seem to me that if the IR is aligned with the visible 532nm or other DPSS frequency, then that's actually safer, since you've got your normal visual aversion to look away or blink. I always figured if the passthrough IR was a safety problem, it would be either if/when there's still...

Hope he at least washed it first.

The IR sensor card would probably be washed out in ambient light. I'd just take all the windows that face that side of the house, and place small AM radios that can run off of AC, and then tape a small external speaker in contact to the glass, and just tune it to a 24/7 news/music station and...

Only if there's enough slav.. I mean, undergrads to clean all the optics afterward.

And the funny thing is those games generally don't have name-brand merchandise prizes in them anyway. Just Chinese knockoffs that look very close to the packaging. Instead of a Sony Play-Station-Portable, in the extremely unlikely chance you win, you get this instead: JXD-S5110b 5" Capacitive...

I'm not a fishtank guy, but I've seen it done on Youtube, The trick is to get a laser with adjustable focus so you can dial it in for max focus right at the depth you need in the tank for the pest organisim. Also, you'd want to point through the tank glass/polymer as straight perpendicular as...

Video of it is here. Seems like I'm spotting a few 445nm's and some 405's too. Fighting/protesting for freedom, assuming it was the "right people" on the ground there in Egypt who were protesting, is IMO more important than "Oh noez... the .gov's gonna take our LAZORS!" LiveLeak.com -...

That would have been my advice as well. My best advice to you is to just let any high power laser conversation go for a few months. You've already learned why not to break your "Kid Mad Scientist Security Protocol" by going for up-front full disclosure with your parents. You should NEVER have...

Ancient Psychic Tandem War Elephant!

Neutral toned sunglasses won't help at all. Whatever limited transmisivity they have is compensated for by your pupil widening. Amber/brown sunglasses might help just a smidge since they start blocking out the green-middle through the blue-violet end of the vis spectrum. Mirroring will help...