Sonic Alarm

sonic bomb

What a riot! I built one of these about 17 years ago as a joke. My sonic grenade has a 1/8 phono jack ‘pin’ with a green LED in the end that would light up when the main switch was switched. The main switch was covered with one of those cool aircraft switch covers. When the pin was pulled five LEDs would count down and then blast the area with a mind numbing 120dB sonic blast of pain. Everyone loved it. If only I had know that people would buy stuff like this.
This one works about the same except the only way to shut it off is to replace the pin! Sounds like a one use wonder to me, if someone used it one me I know hat I’d be pretty keen on breaking it in to little silent pieces.

[via The Red Ferret Journal]
Sonic alarm

No Pets? No Worries…

Pet Live! TV

You live in Tokyo and your apartment is eight foot on a side. You can’t have a pet due to the rental restrictions (plus it might damage your priceless collection of Newtype and FRUiTS magazines that line the walls!) but you still crave warmth and companionship (a girl friend is out of the question, as to why refer to the magazine collection plus they never live up to the ones you know in the dating sims).
So stop thinking of collecting hentai mini figs of Sailor Moon and go hit PET LIVE! TV. Here you can watch a little mini zoo of animals frolic and sleep all via web cam. You could get your fix of your favorite online critter anywhere you can get connected to the ‘net. I like the meerkat myself but the ferrets are a close second. You can also catch a few movies of cats and dogs, but where is the fun in that?

Meerkat Ferrets Chameleon

PET LIVE! TV
BTW, if you click on the ‘So-Net Channel 749‘ logo you go to a programming page where you can browse other ‘odd’ items that are offered to the happy people of Japan. Like ‘Let’s Coke Play Battle Myth‘ and what must be a real must see program, ‘Boy Meets Cooking‘.
You might want to translate these with Excite if your not into the whole Japanese roulette web page thing.)

N55 Protest Rocket System

N55 Protest Rocket

Lets just for a moment forget the fact that if you wheel one of these up to a demonstration, convention, or rally your going to get all sorts of unwanted attention like getting thrown into a police car or shot in the head by a sniper. But then again, maybe you like that sort of thing… Kids today…
Anyway, other than that the idea is pretty cool. If you want to read a pretty good over view of how a modern high powered rocket works this is it. Because the BATF has made obtaining black powder motors next to impossible, the NO2 (nitrous oxide) and plastic motors have become very popular. Its amazing what will produce thrust if you give it a good oxidizer.

    Technical specifications:

    Maximum speed: approx. 475 m/s or 2600 km/h
    Apogee: 5200 meters at a launch angle of 85 degrees
    Net weight: 8,5 kg
    Fuel weight: 3.8 kg

    Component list:
    Steel tube Ø 102 mm
    Acrylic tube Ø 100 mm
    Rocket head: Fiberglass / epoxy
    Cupper nozzle
    Parachute
    Fuel grain: LPDE polyethylene block
    Oxidizer: N20
    Bolts, nuts
    Launching pad
    Launch Control Box:
    Polyethylene box, electric cords, electric switches

[via we-make-money-not-art ]
Manual for Rocket System