You pick the 500-Ohm 1/2W, 1K-Ohm 1/2W or the 10K-Ohm panel-mount potentiometer, all from Alpha Products® with dust covers over a 17mm base, panel tabs, 6mm dia x 10mm long shafts, and 3mm solder lugs with washers and nuts. Shafts are knurled and slotted, and single-turn. Turn them with press-fit black plastic knobs, 6mm ID x 16mm dia x 18mm tall with pointers in assorted colors of red, orange, yellow, blue, green and white.

Build your own quartz antenna. These (2) 4-3/8" x 3" x 1-5/16" plastic boxes each have (2) boxes of quartz crystals inside and (2) aluminum U-brackets that are attached to a single screw terminal on one short side of the box. Back in the early 70's, they were originally made to be used in pairs as part of a 300 Ohm antenna. Not sure if they will work with today's TV's but all you need is cabling to connect them and give it a try. Made in Brazil, the antenna capital of South America, probably.

Don't wait or it'll all be gone. You get (4) pieces, 11 feet each, of 18-2 wire, polarized, black with a white stripe and eminently discardable spade-push terminals on both ends. (That's under a nickel a foot, cowboy.) Lamp cord, speaker wire, pretty much anything you run juice to.

Our each is (4) of the blue plastic "D" Cell modular battery holders, approx 3-3/8" x 1-7/16" x 1-1/8" deep without tabs. They slide together either side-to-side or end-to-end or any combination of both, with connecting tabs in both directions. Can be wired parallel or in series. Open tops. Interesting possibilities.

By jiminy. A little jumper cord with a modular plug on one end and flat "T" connectors on the other side at the end of dual leads. Wires are insulated, with 3-1/2" of the 7" length covered by a telephone-wire-style gray jacket.

Nice little pulley unit kit includes (1) pulley each at 50, 30, 25 and 20mm and (3) pulleys at 11mm, plus myriad bushings, a 3VDC motor, (2) belts and a belt guide, base, mounts and assorted hardware. Includes graphic assembly instructions, plus a couple of rudimentary drawings with suggested projects. It's a mechanical science project waiting for a home.

Our 4-position terminal block is rated for 300V and measures 3/4" x 5/8" x 5/8" tall with set-screw terminals and a 3.6mm ID. 300V max rating. CSA.

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This little aluminum heat sink measures 1" square x 5/8" with (4) 5/8" tall fins and a threaded 3/32" bore.

Remember those old school vibration football games, or those fantastic days-of-yore vibrating beds in roadside motels? This is like that, a small vibration motor (10mm dia x 2.5mm) that’s touch-sensitive and produces a pleasant buzzy response. Motor has 1-1/4" power leads, draws approx 60mA at 3VDC. Has 0.75g vibe amplitude. Self-adhesive pad on one face. No shaft.

If a snow globe and a powered speaker had a baby it would be this tornado light show that whirls to the music, with Bluetooth technology. Makes us proud to know there are electronics engineers out there designing this sort of thing. This 8W unit has a rechargeable battery and USB charge cord, a 1-5/8" dia 70-18KHz speaker and an impeller. Inside the 3-1/2” dia globe is, yes, snow and red, green and blue LEDs that react to sound in a whirlwind effect. Has a micro SD card, a standard 1/8” jack, and 32-foot Bluetooth 2.0 capability. The whole shebang stands 7-1/4" tall on an approx 3-1/2" square base.

Here's a brand new selection of sealed lead-acid rechargeable batteries, for when you're pushing something a little bigger than a penlight. All batteries are all direct from the manufacturer with current date codes. All of them have (2) 3/16" wide quick-disconnect terminals on top. Click on battery description for a photo.

Big sack o' springs. You get (10) springs, mostly compression but probably with a few extension springs thrown in for dessert. Great for art projects, kinetic sculpture or creating tension in any number of scenarios. In sizes ranging from 3/4" long x 1/2" dia up to 2-5/8" long x 1-7/8" dia.

These liquid crystal displays are raring to go. As soon as we can get Mary Ann to stop playing with them we'll pick out (5) assorted displays for you. (She keeps zapping them with static electricity to see what pops up. Mary Ann is easily amused.) Sizes range from 1-3/16" x 2" to a few as large as 5" x 10". They're unused. Some have pin leads, some have traces right on the wafer. Either way, they're a terrific bargain.

Stick this pair of white molded rubber angel wings on the back of your phone and it will sit up like a nice angle (call it the angel angle) when you’re surfing for heavenly apps. Measures 2-1/4” x 1-7/8” with a 1” suction cup. Also good for sticking wings on anything else you want to make a little more seraphic. You’ll get (2) of them. Yes, that’s (4) wings total.

Rated for 10A at 250VAC, these normally closed thermal fuses will pop at 128ºC or 262ºF. The fuses themselves are 1/2" long but yours will be wired into leads of assorted lengths, because they were betooken out of coffeemakers of some sort. Never been popped, though, because then they would be useless and who'd buy 'em?

These momentary SPST push-button switches are normally open and measure 11/16" dia x just over 3/16" thick and have a 15/32" shaft with a steel lock-washer & nut plus a pair of 1/8" solder terminals on the bottom. Rated 3A at 125VAC or 1A at 250VAC. You pick red, green or yellow.

Our motorman, CJ, called this reversible 12-24VDC motor strange, mostly because it has the power contacts mounted on the face, bracketing the 11/16" x 1/8" mostly striated shaft, and has no mounting brackets. But that shouldn't stop a clever person like you. (Hint: it was probably made to fit into a sleeve of some sort.) At 12VDC, draws 100mA no load, stalls 850mA and spins approx 900 rpm; at 24VDC, draws 150mA, stalls 2.2A and spins approx 1800 rpm.  Measures 2-1/4" x 1-13/32" dia.