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Peltier Heat Pump
High tech comes to Am Sci & Surp!! It is here in the form of a Peltier junction, a thermo-electric device that translates electric power into heat, and perversely, into cool. Apply current @ 3-12 VDC to the gizmo and it extracts thermal energy from one face, thereby cooling it. The heat is dumped onto the other face, thereby heating it. Please note: you must use a heat sink on the hot side or the junction will fry itself, since it can quickly create a 65° C temperature differential in a no load situation. Stack two, or build a cascade to increase the thermal differential created. Or run it backwards. Apply heat or cold to the relevant face and produce a current. Amazing for science projects and experiments. Practical for coffee warmers, beer coolers and mini-refrigerator or warming oven applications. Comes with instructions. Large is 1-9/16" sq. x 3/16" thick.
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89143 LARGER PELTIER JUNCTION |
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Quite A Kit
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
We're really charged up about this modular Electronic Lab from Maxitronix(tm) that appeals to both girls and boys. The 4-in-1 set of interactive action kits includes colorful 5-1/2" x 3" x 1-1/8" plastic housings and components to build an electric bell, motor, generator and meter. As the manual says, they're "safe, solderless, educational and fun!" And the manual is the best we've ever seen. Every part and every step is illustrated and labeled (it doesn't presume you can tell an egg lug from a tapping screw), and it explains HOW each experiment works. Kids trying out the 10 suggested experiments learn to reverse a motor's direction, operate the bell or motor with the generator, use the meter to measure electricity and more. Requires (2) "AA" batteries (not included). This is an exceptional set for boys and girls aged 10 and up.
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91870 ELECTRONIC LAB |
Fractured Flamingos!
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
Pieces of parroquets! You put them back together. Our each is (2) different 200-piece Discovering America jigsaw puzzles, featuring various creatures and plants native to the Western Hemisphere. We'll pick a pair from the collection of (4) puzzles that includes flamingos, persimmons, manatees, Atlantic walruses, blue crabs, Carolina parroquets, the famous ruby-throated hummingbirds, and others. Puzzles are 12" x 16" when completed, and tucked in each box is a folded map, approx 24" x 18", of explorers' sea routes to North America.
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38945 NATIVE PUZZLE |
The Ultra (Violet) Pocket Light
Our pocket-sized mini-flashlight has (8) ultraviolet LEDs and myriad uses, from checking for counterfeit U.S. currency to working the door at hip downtown clubs, spotting radiator and transmission fluid leaks, mineral identification, and (yes, it's true) finding scorpions in the dark. Measures 3-7/8" long x 1-1/8" hexagon, and comes with (3) "AAA" batteries for power and a canvas carrying case with a belt loop. You supply the scorpions.
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93507 MINI-UV |
Blowing Smoke
For fun or science. And it's not actually smoke, but a fog created the same way they do for movies and heavy metal concerts. The Zero Blaster is a ray-gun-shaped, black-light-sensitive pistol that pumps out 2" to 4" dia smoke rings (rotating toroidal vortices, to be exact) that will, one after another, waft up to 12 feet away for hours of good, clean fun. Measures 9" long x 6-1/2" high. The Wizard Stick is a fog-producing wand, 10" long on a 4-5/8" x 2-1/4" base, and comes with an instruction manual for science experiments and special effects, including making wind tunnels and a vapor-ring blaster. Also good as a household draft-finder. Each takes (6) "AA" batteries, not included, and comes with a 3-ounce bottle of non-toxic fog juice, good for 25,000 smoke rings or a whole lot of fog. Better order an extra bottle of Super Zero Fluid, the replacement juice, just in case.
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93586 SUPER ZERO FLUID | |
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93585 WIZARD STICK | |
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93584 ZERO BLASTER |
Write Like A Pirate
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
Put a little aaaaarrrgh in your signature, me bucko. Our each is a package of (3) resin ballpoint pens, 6-1/2" long with assorted, and very detailed, pirate/skull heads on the top. Very Buccaneers-of-the-Caribbean-ish. Good for everyday use, but essential for drawing treasure maps.
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39029 PIRATE PENS |
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Deja Who?
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
What a concept! A 2" x 2" x 2" cube with a clever mechanism inside and each of its (6) sides made up of (9) brightly colored plastic cubes. Twist and turn the cube(s) to mix up the colors, then do it again to return each side to a single, solid color. Hmm. Colors of the movable cubes are white, blue, green, yellow, red - and pink!
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93427 PUZZLE CUBE |
Demo Generator Ray-Gun
Flash Gordon lives! Or at least his ray gun lives! This look-alike hand-held dynamo/generator, with a green-plastic crank, is transparent plastic, so the students can see the parts at work. Measures just over 5" long. Comes polarized 22" test lead with black and red insulated alligator clips. Max voltage is approx 7VDC. If you're using a meter, turn the crank CCW.
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93599 DEMO GENERATOR |
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