Evil Mad Science Garage Sale
Neat-o! You've found the Evil Mad Science Garage Sale. Here you can sometimes find cheap, interesting, broken, surplus, inappropriate, and/or weird things for sale.

Please read these important policies about the Garage Sale:

  1. If your order contains any any garage sale items, your order shipment may be delayed by up to a week while we dig those items out of the back of the garage and get them to the warehouse. If there are regular items in your order you would like to get sooner, please consider placing a separate order.
  2. All items are sold as-is and are limited to stock on hand.


LEDs

5 mm white LEDs with clear lenses:

Good quality ultrabright white 5 mm clear lens LEDs. Factory new, RoHS compliant (lead free), very bright. Actually really nice and *would be* in the main store, except that the device-to-device variation in white-point color temperature variation is larger than we'd like. Pretty good in non-critical applications, like those involving a single LED or other cases where LED matching isn't critical. We bought *lots* of these, so we're pricing them at deep discount to clear them out.

    Specs:
  • Forward voltage: 3.2 - 3.4 V Typ, 3.8 VMax
  • DC forward current: 30 mA continuous, 100 mA peak (10 ms @ 10% duty)
  • Intensity: 10000-11000 mCd typ.
  • Viewing angle: 20 degrees
5 mm white, clear lens LEDs (200-pack) $20 Add item to Shopping Cart
5 mm white, clear lens LEDs (640-pack) $60 Add item to Shopping Cart

"3-5 W" White LEDs (Surplus):
High-power LEDs. Painfully bright. White, on aluminum "star" breakout. Individually tested to make sure that you don't get a dud. An external heat sink is strongly recommended if you operate these above 0.5 W. A welding helmet is recommended if you intend to look at these.

These were sold to us as 5 W LEDs. However, we don't have a datasheet and suggest actually keeping them below 3 W, just to be on the safe side. Regardless, it's a lot of photons per dollar.

High power LED
LEDs: "3-5 W" Surplus White LED (each) $5 Add item to Shopping Cart


EvilMadScientist Project Parts

3 mm Clear Lens LEDs:

You asked for them, so here they are: LEDs that are perfect for Edge-lit Holiday Cards. 10 each of blue and white, superbright 3 mm clear lens LEDs. Brand new and very bright (appear to be 5000-8000 mCd class). Clear-lens 3 mm (T-1) package with flatted side and short lead to indicate cathode. We'll keep a bunch of these in stock so they won't be subject to the usual garage sale delay.

3 mm Blue and White LEDs (10 of each) $5 Add item to Shopping Cart

Cheap Toothbrushes

Yup, toothbrushes.

These polypropylene-handle, nylon-bristle toothbrushes are *terrible* if you want to brush your teeth, because the bristles don't spring back very well. On the other hand, they are a good pick for BristleBots because (1) you can angle the bristles by hand-- just push hard and (2) the back side is very flat, unlike more expensive toothbrushes that are rounded-- this makes it easier to mount your battery and motor. Also, they're very cheap. New, individually wrapped-- and probably even sealed-- but we don't guarantee them to be clean and/or sterile enough for any particular application.

Cheap Toothbrush $0.25 Add item to Shopping Cart
Cheap Toothbrushes (Box of 144) $25 Add item to Shopping Cart

Practice PCBs

Need to bone up on soldering? Just goofing around and want some boards to practice on? Teaching a class and need some practice boards? We've got you covered. You'll get a pack of five brand new, clean, high quality, lead-free, through-hole circuit boards. (Ones that we're not using because they're obsolete or have minor mistakes in the circuitry.) All boards have places for integrated circuits, LEDs, capacitors, resistors, headers, and other common components. You'll get five boards; could be five of the same or all different; you never know. :)

Practice PCBs $2.50 Add item to Shopping Cart



Electronic Components


Miniature 5V relays

DIL Relays by Hamlin, type HE721E0510. SPDT-CO 5V miniature DIL relay. These are in a plastic DIP-like package. (Through-hole, easy to use.) (7 on hand)

Hamlin HE721E0510 relay $0.75 Add item to Shopping Cart



Electronic Components (Surface Mount)


LM393 (SO-8), tubes of 100.

LM393 Dual Comparator, ST Microelectronics. Tube of 100. SO-8 (surface mount) package. Surplus, new in tube. (2 tubes on hand)

LM393 (SO-8), tube of 100 $17 Add item to Shopping Cart

DF04S 1.5A Bridge Rectifiers

DF04S 1.5A Bridge Rectifier. Partial/short tube of 23. SDIP (surface mount) package. Surplus, new in tube. (1 tube on hand)

DF04S 1.5A Bridge Rectifiers (set of 23) $3 Add item to Shopping Cart


Spare Parts Kits

Spare parts for Interactive LED Panels

Repair kit for one Interactive LED Panel. Contains five replacement quad op-amp chips, to replace components that can be easily damaged by reverse voltage.

Interactive Panel Spare Parts $2 Add item to Shopping Cart

Spare parts for Peggy 2

Repair kit for Peggy 2. Complete chip set including preprogrammed ATmega328 and electrolytic capacitors.

Peggy 2 Spare Parts $15 Add item to Shopping Cart



"Factory goof" Interactive LED Panels. $70-85.


Current-generation factory-assembled interactive LED panels but with goofs in the assembly process. (We'd work harder at training our employees, but hey, the sharks need to eat, right?) Each panel would be in fine working condition if not for a few misplaced components. Your mission, should you be good at soldering and choose to accept it: desolder indicated through-hole components and replace them with the correct component or with the same type of component but facing the right direction. (Funny how those LEDs only work when you plug them in the right way.) For each "Factory goof" panel, we'll describe exactly which components need to be replaced and provide replacement components. The benefits? A modest to steep discount, depending on how much repair is needed, and you can "build" interactive panels more quickly than starting from a kit.

Additional caveat 1:
The white LEDs used on this batch of boards are from a different vendor than those on our regular panels. No real operational difference, but they are not a good *visual match* to the LED panels on the main store-- so we encourage you to pick one or the other type, and not mix them in the same setup.

Additional caveat 2:
"Factory goof" panels are supplied without power jack, power switch, or power supply. You'll need to solder on one switch and jack set (sold separately) to one panel in your set to get your panel(s) working, and a power supply that can provide power to as many panels as you are going to hook up together. (As usual, panels that are connected together at their edges can share power connections, so you'll only need one of each.) The jack and switch set are available separately; up to 12 panels connected together and powered through one jack and switch.

OK Panel-- no repair needed
  but with matching LEDs (one in stock)
$85 Add item to Shopping Cart
Unit #1 -- no repair needed
  Kludgy repair visible on one LED
$80 Add item to Shopping Cart
Unit #4
  Needs photosensors (4) replaced
$70 Add item to Shopping Cart


Switch + Jack
The panels above don't have a jack & switch installed, so you'll need one for each set if panels you want to install. (Or hook them to an existing panel installation that has available power.)

If you get (for example) eight panels and want to make two smaller four-panel Interactive LED end tables, you'll need (A) two power supplies, but also (B) two power jacks and switches.

Jack + Switch set $4 Add item to Shopping Cart


Power Supplies sold separately.

US/Canada
Small
Universal
Small
Universal
Large
Powers 1-3 panels 1-3 panels 1-12 panels
Style Wall Plug Wall Plug Corded
Plug US/Canada Multi-plug* US/Canada**
Price $22 $31 $45
Purchase Add item to Shopping Cart Add item to Shopping Cart Add item to Shopping Cart
*Multi-Plug: Includes plugs for US/Canada, UK, Europe, Australia
**Customers outside US/Canada: you will need to supply your own local line cord. ("Wall" AC to IEC C7 "Figure 8" cord, typically < $5.)


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