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Slide Pot

Nice little slide pot of the sort used for e.g. speaker volume control. Which is to say it is low wattage, probably under a half, but we don't know for sure. It has a 3/8" x 1-3/8" x 1/4" body with a 1/2" long constant resistance between the inside contacts, short between the outside, and 0-200 ohms variable between any inside and any outside contact. Circuit board mount. CTS SA 1315 8914.

24210 SLIDE POT, 0-200 OHMS
$2.00 PKG(4)

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LEDs By The Dozen

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 ! !

6796 LED ASSORTMENT
$2.25 PKG(12)

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Resistors

We have hundreds of thousands of 1/4 watt resistors which we will send an assortment of (100) 1/4 watt resistors of at least (10) different ohm ratings. All have two axial leads, and 5% tolerance. Don't miss out! This is to cheep to pass up.

21970 ASSORTED RESISTORS
$1.50 PKG(100)

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Tornado Tube

Simple, yet clever 1" dia. by 3" long plastic device to demonstrate the vortex effect of a tornado. Partially fill with water one of the two half-gallon size plastic soda bottles which you supply. Screw the bottles into opposite ends of the tube which we supply. Tip so the full bottle is on top and give it a circular starting whirl. Presto! You have a vortex. Call it a tornado if you're a meteorologist, a Charybdis if you're a classicist, or a whirlpool if you're into oceanography. Lots of fun and a fine opportunity to attempt to explain the effects of the earth's rotation on water draining out of a bathtub. The phenomena are related we're told, but good luck!!

6667 TORNADO TUBE
$2.95 EACH

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A Snarl of Magnet Wire

One of those sharpie East Coast outfits pulled a fast one on this poor naive Midwestern dealer. The result is we have a pile of exotic coated copper magnet wire. The coatings and colors vary widely, as does the gauge of the wire. With a couple of exceptions there isn't enough of any one kind among the hundreds in the pile to list separately. So we are offering an assortment and you get whatever we grab. Either way you will get a terrific value, particularly if you have an exotic application and get just what you need. Even if you are just making a garden variety coil or electromagnet you will still find the prices are very good. So go ahead, profit from our misfortune. We are glad to be of service. Sigh.

36227 MAGNET WIRE, 16 GA
$11.95 (100 FT)
36228 MAGNET WIRE, 20 GA
$10.95 (200 FT)
36229 MAGNET WIRE, 24 GA
$8.95 (200 FT)

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Meter That Volt

A nice price for a 0-10 volt DC voltmeter. The black-plastic housing is 4" x 5-1/2" x 3-3/4" high overall, with a slanted gauge face about 3-1/2" x 4". Red and black thumbscrew terminals for positive and negative inputs. Great for small school projects or testing batteries around the house.

91698 VOLTMETER
$9.95 EACH

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4.1 MFD Capacitor

A 4.1 MFD 300 VAC capacitor. Only 1-5/8" long x 3/4" dia., the MGT-67A P.C. mount capacitor has a resistor mounted on its side.

28999 4.1 MFD CAPACITOR
$2.00 EACH

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Tinker With Transistors

Warning!  WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.

Hundreds of experiments. Months of fun. These solderless electronic kits from Maxitronix™ are exceptional. Each comes with a plastic console, myriad pieces and parts, and an entertaining, easy–to–read instruction book that’s so big it’s called an Owner’s Manual. The 300–in–1 kit has a 13” x 9-1/2” console with a built-in speaker, earphone, LED display, meter and more. It starts with the basics about transistors, transformers, diodes, capacitors, oscillators, circuits, etc., offering (300) radio–circuit, sound–effect, digital and other projects. equires (6) “AA” batteries (not included). Anyone from age 10 to adult who likes electronics will lust after these kits!

91934 300-IN-1 KIT
$99.95 EACH
 

Battery Tester

Knowledge is power - in this case, battery power. You'll know from the easy-to-read gauge on this black-plastic handheld mini-tester whether a battery is good, low or needs to be replaced. The 4-1/4" x 2-3/8" x 1" testor reads "AAA," "AA," "C," "D," 9 volt, 1.5 volt button, and other sizes.

91981 BATTERY TESTER
$4.25 EACH

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RF? Maybe

Good things come in little packages. In this case the package is a 1-1/4" x 1-1/4" x 1/2" modulator, and the good things are a circuit board with at least a trimpot, electrolytic capacitor, assorted coils, 3-pin connector, RCA plug and (2) pop-off covers. Have a blast.

34533 MODULATOR
$1.00 EACH

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Kaboom

One of our truly unusual treasures. It's a used 28 VDC single-pole/single-throw toggle switch, possibly military surplus. A sensor mounted on it is labeled Oxygen Warning Switch. We think that means that it switches off in the presence of pure oxygen, the better to keep from blowing something to kingdom come with an errant spark. Overall, it's 3-1/2" x 1-1/2" x 1", not counting the 3/4" toggle. The 3-pole sensor itself is under a black-painted aluminum cover 1-1/2" high x 7/8" dia. (3) leads, (3) holes in its right-angle mounting bracket. We're just not sure what it is that would be blown up if it weren't there.

32864 OXYGEN SWITCH
$1.00 EACH

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