
Light emitting diodes. Solid state devices that provide the ubiquitous power and indicator lights on your electronic gadgetry. Unlike lamps, there are no filaments that glow. Rather, some two volts of DC power at a miniscule 10 to 20 milliamps of current get the chemistry excited, and they just plain emit. Emit is a good word, too, as they don't really cast light, but glow brightly. We have a nice assortment of 3 and 5 MM diameter sizes in red, green, orange, and yellow. The longer lead is always positive, the shorter always negative, and you always need a current limiting resistor (about 500 to 1,000 ohms for 5 to 9 volt DC sources) to keep the current in the 10-20 MA range. If that's Greek to you you're either going to blow a lot of LED's or learn to change incandescent indicator lamps ! !
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6796 LED ASSORTMENT |
Mystery Boxes of stuff like what you see in the catalog. Maybe we had a little left but not enough to continue the listing. Maybe we only got a few as part of an odd lot. Maybe we just lost some, and just found them in our warehouse. You will get items which originally listed for at least $25.00 total in our catalog (or would have, if we had enough). You pick. The "electro-mechanical" box has things like motors, switches, hardware and components that are useful parts but want to be worked into something bigger. The "consumer" box has more ready-to-go type items, and things that don't have as technical a flavor, like bottles, toys, books and giant rubber bands. The fun is in the mystery and surprise. Perfect if you don't know what to give Aunt Maude and Uncle Ned, or if you can't decide how to bring your order up to the minimum. Every couple of months the contents will keep changing, so even if you have gotten a box before, feel free to order again! (Please note: Ordering multiple boxes at the same time will result in duplicate items.)
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23610 CONSUMER SURPRISE BOX |
The kids need presents for all the grandmas and great-aunts? You volunteer at the nursing home and need token gifts for your L-O-Ls? And your eyes aren't so good, either? Our each is really half a dozen pretty little magnifiers with round lenses and fancy handles. The handles are silver-bright (hard to believe they're aluminum) and all different. Each has a discreet hole in the tip for a jump ring so it could be worn on a necklace -- but it would look just as pretty on a desk. The overall length of the (6) magnifiers varies from about 3-3/4" to 5", the lenses from 1-1/4" to 1-3/4" dia. All are approx 2X magnification. Mary Ann's pick of the month.
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92544 CLASSY MAGNIFIERS |
Originally intended for hospital use (Think Nurse Cratchit. Think cold, wet sponge baths.), these 12” x 9–1/2” x 4–1/4” deep washbasins have rounded ends and flat lips. The #5 plastic is that wonderful institutional–yellow color. But they’re indestructible, short of melting them, and they nest when not in use. Use them to store your craft supplies, the kid’s action figures, the cat’s squeeze toys. Or take up nursing.
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91728 YELLOW WASHBASIN |
Don't know, do you? You need these Freezer Labels with two lines to record the item and date (and snowflake decorations at no extra charge). Or use to identify those goodies you canned, baked, pickled or re-packaged to fool the other mothers at the school bake sale. Our each is a package of (24) 2" x 3" peel-and-stick labels.
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36860 FREEZER LABELS |
And save someone's neck. This deeply textured safety tread is diamond-plate-pattern black rubber, 17" x 3-7/8" x 1/4" thick, with a peel-off self-adhesive back. It can be cut, but won't easily crack or tear. A great way to add traction to truck bumpers, RV steps, ladder steps, etc.
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93119 SELF ADHESIVE RUBBER STAIR TREAD |
New, international-standard, full-sized illuminated student microscope. Professional quality at a student price, it has turret-mounted achromatic objectives, fine and coarse rack-and-pinion focus and substage diaphragm light control, and a metal frame. It is built to international DIN standards and accepts all DIN eyepieces and objectives. With extras like focus stop for slide protection, adjustable tilt and (2) spring clips, it is a fine instrument for most home science work. If you are looking for more magnification purchase the spring loaded 100X (oil immersion) objective lenses. Brings your scopes total magnification up to 1000X magnification. Our (36) piece assorted specimen set comes on (12) slides. All are great additions.
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12016 (36) SPECIMEN SLIDE ASSORTMENT | |
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38569 100X OBJECTIVE LENS (OIL IMMERSION) | |
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52453 400X STUDENT GRADE MONOCULAR MICROSCOPE |
Wire up those bowling trophies, or just rewire those lamps with the ugly black cords. You get a package of (4) white 18-2 AWG lamp cords, 48" long, with plugs on one end. Cheap, cheap.
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38871 LAMP CORD |
Wow! Really Bright! These are the type of LEDs you see in those ultra–bright key–chain flashlights. White 8mm diameter and operate on 3.5- 4.5 volt, 20% viewing angle, and approx. 5000 MCD. Great for electronics, model trains, miniatures, your own flashlight design.
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93076 WHITE 8MM LED |
With extra-sturdy construction, international-standard DIN, fully coated eyepiece and objectives, this is an excellent student microscope. It provides good resolution and centering, and maintains focus when objectives are changed. Stage clips, rack stops, smooth positive mechanical movements, built-in illuminator, coarse and fine focus.
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93724 1000X ADVANCED STUDENT MICROSCOPE |
Toddlers dripping the drawn butter all over their designer togs, are they? You need these 14" x 9" disposable plastic bibs with smiling cartoon lobsters frolicking on the beach. Equally suitable for finger-painting sessions, or lobster-eating adults with no sartorial pride. Each pack is (50) bibs.
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39092 KID'S BIBS |
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